Which of the following instructions regarding lithium therapy should be included in a nurse’s discharge teaching? (Select the one tha does not apply.)
Rationale:
D: Restrict sodium content. Lithium therapy requires stable sodium levels, so restricting sodium can lead to fluctuations in lithium levels, potentially resulting in toxicity or ineffective treatment.
A: Avoid excessive use of beverages containing caffeine. Caffeine can increase lithium levels and should be limited, making this instruction essential for managing therapy effectively.
B: Maintain a consistent sodium intake. Consistent sodium intake helps stabilize lithium levels, preventing adverse effects and maintaining therapeutic efficacy, which is crucial for patient safety.
C: Consume at least 2,500 to 3,000 mL of fluid per day. Adequate fluid intake is vital to prevent dehydration, which can elevate lithium levels and lead to toxicity during treatment.
What does the nurse know to be correct concerning the use of mannitol in patients?
Rationale:
Mannitol decreases intracranial pressure. This osmotic diuretic draws water out of the brain and into the bloodstream, effectively reducing swelling and pressure within the cranial cavity, improving patient outcomes in neurological conditions.
B: It increases intraocular pressure. While mannitol can affect fluid dynamics, its primary role is to lower pressure rather than increase it, especially concerning intracranial pressure.
C: It causes sodium and potassium retention. Mannitol primarily promotes diuresis, leading to the excretion of sodium and potassium rather than their retention, which is contrary to its mechanism of action.
D: It causes diuresis in several days. Mannitol acts rapidly to induce diuresis, typically within hours, making the notion of several days overly extended and inaccurate regarding its therapeutic effects.
A nurse is caring for a female diagnosed with a mental disorder who has been prescribed medication. Which fact will most impact the nurse’s assessment for possible side effects?
Rationale:
A: Women are at higher risk for tardive dyskinesia while taking conventional antipsychotic medications. This fact is crucial for the nurse's assessment as it identifies a specific vulnerability in female patients, guiding monitoring efforts for early detection of this potentially severe side effect associated with the prescribed treatment.
B: Women experience more severe side effects than men while taking atypical antidepressants. This statement lacks specificity regarding the particular side effects linked to the medications in question, diminishing its relevance in assessing the patient's condition.
C: Women are more susceptible to developing a dependence on most psychiatric medications than are men. While this highlights a concern, it does not directly address the immediate side effects of the conventional antipsychotics being administered.
D: Women are less susceptible to developing the common side effects of antipsychotic medications than are men. This contradicts existing evidence regarding gender differences in medication responses, leading to a misleading understanding of potential risks for the patient.
A patient has been taking naltrexone (ReVia) as part of the treatment for addiction to heroin. The nurse expects that the naltrexone will have which therapeutic effect for this patient?
Rationale:
Naltrexone prevents the euphoric effects of opioid drugs, making it effective in treating heroin addiction by blocking the receptors that opioids would normally activate. This reduces the likelihood of relapse by eliminating the pleasurable sensations associated with drug use.
A: Naltrexone prevents the cravings for opioid drugs. While cravings may be reduced, naltrexone primarily blocks the effects of opioids rather than solely addressing cravings directly.
B: Naltrexone works as a safer substitute for the heroin until the patient completes withdrawal. Naltrexone does not serve as a substitute; it actively blocks opioid effects rather than providing a safer alternative.
C: The patient will experience flushing, sweating, and severe nausea if he takes heroin while on naltrexone. This statement inaccurately emphasizes withdrawal symptoms rather than the primary mechanism of blocking euphoria from opioid use.
A patient is in an urgent-care center with an acute asthma attack. The nurse expects that which medication will be used for initial treatment?
Rationale:
A short-acting beta2 agonist such as albuterol (Proventil) is typically used for initial treatment during an acute asthma attack due to its rapid bronchodilation effects.
A: An anticholinergic such as ipratropium (Atrovent) provides additional bronchodilation but is not the first-line treatment in acute situations, making it less effective for immediate relief.
C: A long-acting beta2 agonist such as salmeterol (Serevent) is designed for maintenance therapy, lacking the rapid onset required for acute asthma attacks, thus delaying symptom relief.
D: A corticosteroid such as fluticasone (Flovent) is utilized for long-term control and inflammation reduction but does not provide the swift bronchodilation necessary for urgent asthma management.
The situation when failure to continue administering the drug results in serious psychological and somatic disturbances is called?
Rationale:
The situation when failure to continue administering the drug results in serious psychological and somatic disturbances is called abstinence syndrome.
Abstinence syndrome accurately describes withdrawal symptoms experienced when a drug is suddenly discontinued, leading to significant physical and mental health challenges. This phenomenon is commonly associated with dependency on substances, where abrupt cessation triggers a range of distressing effects, highlighting the drug's impact on the body's functioning and mental state.
A: Tachyphylaxis Involves a rapid decrease in response to a drug after repeated doses, not the psychological or physical disturbances seen with drug withdrawal.
B: Sensibilization Refers to an increased response to a drug after repeated exposure, focusing on heightened effects rather than withdrawal symptoms associated with drug cessation.
D: Idiosyncrasy Describes an unusual or atypical reaction to a drug that is specific to an individual, lacking the broader withdrawal implications inherent in abstinence syndrome.
The effect of the drug on parasympathetic function declines rapidly in all organs EXCEPT:
Rationale:
The eye remains significantly affected by the drug on parasympathetic function longer than other organs. This extended effect is due to the eye's unique anatomical and physiological characteristics, which maintain parasympathetic responsiveness despite the drug's decline in other areas.
B: Heart The heart's parasympathetic function diminishes quickly due to its high metabolic demands and the rapid response required for maintaining cardiac output during various physiological states.
C: Smooth muscle organs Smooth muscle organs exhibit a swift decline in parasympathetic function, as they often respond rapidly to hormonal signals and local stimuli, overshadowing the drug's prolonged effects.
D: Glands Glands tend to show a rapid decrease in parasympathetic action as well, largely due to their adaptive mechanisms, which prioritize immediate responses over sustained parasympathetic stimulation.
Which of the following sympathomimetics is preferable for the emergency therapy of cardiogenic shock?
Rationale:
Dobutamine is preferable for the emergency therapy of cardiogenic shock. Its unique properties include potent inotropic effects with less vasoconstriction, improving cardiac output while minimizing potential increases in afterload, making it ideal for this condition.
A: Epinephrine primarily increases heart rate and causes vasoconstriction, which can worsen myocardial oxygen demand in cardiogenic shock rather than improving overall cardiac function effectively.
C: Isoproterenol primarily functions as a potent beta-agonist, significantly increasing heart rate, which can lead to arrhythmias and is not optimal for managing cardiogenic shock's underlying issues.
D: Methoxamine is predominantly an alpha-agonist, leading to increased vascular resistance and potentially elevating afterload, which can further compromise cardiac output in patients experiencing cardiogenic shock.
Which of the following hypnotic drugs is used intravenously as anesthesia?
Rationale:
Thiopental is used intravenously as anesthesia. This drug is a short-acting barbiturate, ideal for induction in anesthesia due to its rapid onset and ability to induce unconsciousness quickly, making it a preferred choice in surgical settings.
B: Phenobarbital functions primarily as an anticonvulsant and sedative, lacking the rapid anesthetic properties necessary for intravenous use in surgical procedures. Its longer duration is less suitable for anesthesia.
C: Flurazepam is primarily utilized for treating insomnia and anxiety, not as an anesthetic. Its effects are not immediate enough for intravenous anesthesia, making it inappropriate for surgical applications.
D: Zolpidem is primarily prescribed for short-term management of sleep disorders. Its formulation and action are not suitable for intravenous anesthesia, limiting its use in surgical contexts significantly.
The principal central nervous system effect of the opioid analgesics with affinity for a mu receptor is:
Rationale:
All of the above. Opioid analgesics binding to mu receptors produce multiple central nervous system effects, including analgesia for pain relief, respiratory depression impacting breathing, and euphoria enhancing mood, demonstrating their broad pharmacological impact.
A: Analgesia Producing pain relief alone does not encompass the full range of effects associated with mu receptor activation, missing respiratory depression and euphoria.
B: Respiratory depression Highlighting only respiratory depression overlooks analgesia and euphoria, which are also significant effects resulting from opioid action at mu receptors.
C: Euphoria Focusing solely on euphoria neglects the essential analgesic and respiratory effects that opioids exert through mu receptor interaction, indicating a partial understanding of their action.
Which of the following antidepressants is a selective serotonin reuptake inhibitor?
Rationale:
Fluoxetine is a selective serotonin reuptake inhibitor (SSRI). SSRIs, including fluoxetine, specifically target serotonin reabsorption in the brain, enhancing mood regulation and alleviating symptoms of depression through increased serotonin availability.
A: Phenelzine is a monoamine oxidase inhibitor (MAOI), which functions differently by preventing the breakdown of neurotransmitters, rather than selectively inhibiting serotonin reuptake.
B: Desipramine belongs to the tricyclic antidepressant class, affecting multiple neurotransmitters rather than specifically targeting serotonin reuptake, thus lacking the selective mechanism of SSRIs.
C: Maprotiline acts primarily as a norepinephrine reuptake inhibitor and does not focus on serotonin reuptake, making it distinct from selective serotonin reuptake inhibitors like fluoxetine.
Substances causing narco- and glue sniffings are all of the following EXCEPT:
Rationale:
Substances causing narco- and glue sniffings are all of the following EXCEPT antipsychotic drugs. Antipsychotic medications are primarily used to manage severe mental health disorders and do not induce the psychoactive effects associated with recreational inhalants, unlike stimulants, psychedelics, and sedatives, which can lead to mind-altering experiences and potential addiction.
A: Stimulants These substances enhance alertness and energy, often leading to misuse for their euphoric effects, making them common in recreational settings alongside inhalants.
C: Psychedelics Known for altering perception and consciousness, psychedelics can be misused in similar contexts as inhalants, contributing to their classification as substances of concern in recreational drug use.
D: Sedative drugs These substances depress the central nervous system, promoting relaxation and euphoria, which can encourage their misuse in conjunction with inhalants, exacerbating the risks associated with their combined use.
Choose an emetic drug of central action:
Rationale:
D: Apomorphine hydrochloride is an emetic drug that acts centrally to induce vomiting by stimulating the chemoreceptor trigger zone in the brain, effectively prompting the vomiting reflex in response to various stimuli.
A: Ipecacuanha derivatives primarily induce vomiting through peripheral mechanisms, acting on the gastrointestinal tract rather than central pathways, which differentiates them from central acting emetics.
B: Promethazine functions mainly as an antihistamine and antiemetic, but it does not stimulate the central vomiting centers, making it unsuitable as a central emetic agent.
C: Tropisetron is a 5-HT3 receptor antagonist used to prevent nausea and vomiting, particularly in chemotherapy, but it does not have emetic properties nor acts centrally to induce vomiting.
All these drug groups useful in angina both decrease myocardial oxygen requirement (by decreasing the determinations of oxygen demand) and increase myocardial oxygen delivery (by reversing coronary arterial spasm), EXCEPT:
Rationale:
All these drug groups useful in angina both decrease myocardial oxygen requirement and increase myocardial oxygen delivery, EXCEPT Potassium channel openers (Minoxidil).
Potassium channel openers primarily function to lower vascular resistance and improve blood flow but do not specifically target myocardial oxygen demand reduction or coronary artery spasm reversal, making them less effective for angina management.
A: Nitrates and nitrite drugs (Nitroglycerin, Isosorbide dinitrate) effectively relieve angina by dilating coronary arteries and decreasing myocardial oxygen demand, directly addressing both aspects of oxygen requirement and delivery.
B: Calcium channel blockers (Nifedipine, Nimodipine) lower myocardial oxygen demand by reducing heart rate and contractility while also preventing coronary artery spasm, thus enhancing oxygen delivery to cardiac tissues.
C: Beta-adrenoceptor-blocking drugs (Atenolol, Metoprolol) decrease heart rate and contractility, lowering myocardial oxygen demand, and also improve oxygen delivery by indirectly reducing myocardial workload during angina episodes.
Vasopressin possesses the following:
Rationale:
Vasopressin possesses antidiuretic property. This hormone promotes water reabsorption in the kidneys, reducing urine output and concentrating urine, thus effectively regulating the body's fluid balance and preventing dehydration.
B: Vasodilatation property. This option misrepresents vasopressin's primary function, as it primarily causes vasoconstriction, thereby increasing blood pressure rather than promoting dilation of blood vessels.
C: Release of a thyroid hormone into the plasma. This choice confuses vasopressin with thyroid hormones, which are unrelated; vasopressin's role does not involve thyroid hormone regulation or release.
D: Diuretic property. This option contradicts vasopressin's antidiuretic function, as a diuretic promotes increased urine production, which is opposite to what vasopressin accomplishes in the body.
Ketoprofen is a propionic acid derivative that inhibits both cyclooxygenase (nonselectively) and lipoxygenase. This statement is:
Rationale:
Ketoprofen is a propionic acid derivative that inhibits both cyclooxygenase (nonselectively) and lipoxygenase. This statement is true.
Ketoprofen’s classification as a propionic acid derivative is accurate, and its action of inhibiting cyclooxygenase and lipoxygenase aligns with its pharmacological profile, confirming the statement's validity. The dual inhibition plays a significant role in its anti-inflammatory and analgesic effects, supporting the assertion made.
B: FALSE This option contradicts the factual classification and mechanism of action of Ketoprofen, which indeed inhibits both cyclooxygenase and lipoxygenase, validating the original statement.
C: None Choosing this option overlooks the clear factual accuracy of the statement regarding Ketoprofen’s properties and mechanisms, which are well-established in pharmacological literature.
D: All of the above This option incorrectly implies that multiple choices can be simultaneously correct, while only one option accurately reflects the truth about Ketoprofen's biochemical actions.
Which of the following antivitamins prevent a vitamin K from exerting its typical metabolic effects?
Rationale:
All of the above. Each of the listed antivitamins—cholestyramine, coumarins, and antibiotics—disrupt vitamin K's metabolic functions, inhibiting its role in blood coagulation and other essential processes, ultimately leading to potential deficiencies.
A: Cholestiramine Binds to bile acids, thereby reducing the absorption of fat-soluble vitamins, including vitamin K, significantly impairing its metabolic effects and leading to potential health complications.
B: Coumarins Act as anticoagulants by inhibiting vitamin K-dependent clotting factor synthesis, directly obstructing vitamin K's metabolic functions and causing a reduction in its physiological efficacy.
C: Antibiotics Disrupt gut flora, which can interfere with the synthesis and absorption of vitamin K, diminishing its availability and effectiveness in metabolic processes crucial for health.
Which of the following statements refers to cholecalciferol:
Rationale:
D: Mechanism of action: 1. Genomic effects 2. Cytoplasmic effects. Cholecalciferol, also known as vitamin D3, functions through genomic and non-genomic pathways, which are essential for calcium homeostasis and bone health regulation.
A: Frequent monitoring of both calcium and phosphorus serum levels is necessary in case of intravenous administration. This statement pertains to administration practices rather than the specific actions or mechanisms of cholecalciferol.
B: Has potent anti-osteoclast activity – mechanism unknown. While cholecalciferol influences bone metabolism, the statement does not accurately describe its proven mechanisms, which are primarily genomic and cytoplasmic.
C: Can usually lower serum calcium levels in 48 hours. Cholecalciferol typically raises serum calcium levels through its role in calcium absorption, contradicting the assertion made in this statement.
All of antibiotics are aminoglycosides, EXCEPT:
Rationale:
C: Clindamycin is not an aminoglycoside but a lincosamide antibiotic, which works differently by inhibiting bacterial protein synthesis, unlike the aminoglycosides that target ribosomal function more directly.
A: Gentamycin belongs to the aminoglycoside class, used primarily for treating serious infections caused by gram-negative bacteria by disrupting protein synthesis in bacteria.
B: Streptomycin is classified as an aminoglycoside antibiotic, effective against tuberculosis and other infections, functioning by binding to the bacterial ribosome and inhibiting protein synthesis.
D: Neomycin is also an aminoglycoside, commonly used topically for skin infections and works by interfering with bacterial protein synthesis, similar to other drugs in this category.
Tick the drug for cestodosis (tapeworm invasion) treatment:
Rationale:
Praziquantel is the drug indicated for the treatment of cestodosis. This medication effectively targets tapeworms by increasing their permeability to calcium ions, ultimately leading to paralysis and death of the parasites, thereby facilitating their elimination from the host.
A: Piperazine Acts primarily against roundworms, not effective for tapeworms, and lacks the specific action required for cestodosis treatment, making it unsuitable for this purpose.
C: Pyrantel Primarily effective against nematodes, it does not possess the necessary mechanism to disrupt or eliminate cestodes, rendering it ineffective in treating tapeworm infections.
D: Ivermectin Primarily used for treating ectoparasites and some nematodes, it does not target tapeworms, thus failing to provide the necessary therapeutic action for cestodosis.
Which of the following actions most likely mediated the therapeutic effect of both drugs in the patient's disease?
Rationale:
Upregulation of hepatic low-density lipoprotein (LDL) receptors. This mechanism enhances the liver's ability to clear LDL cholesterol from the bloodstream, thereby reducing cholesterol levels and contributing to the therapeutic effects of the drugs.
A: Decreased intestinal reabsorption of bile acids. While this action can lower cholesterol levels, it primarily affects bile acid recycling rather than directly influencing LDL cholesterol clearance from circulation.
B: Decreased conversion of cholesterol to bile acids. This process impacts cholesterol metabolism but does not directly enhance the liver's capacity to remove circulating LDL cholesterol, limiting its therapeutic relevance.
C: Decreased synthesis of cholesterol by the liver. Although reducing cholesterol synthesis can lower overall cholesterol levels, this action does not directly improve the clearance of LDL cholesterol from the bloodstream.
A patient to be commenced on oral anticoagulant therapy for DVT would be treated with
Rationale:
Oral anticoagulant therapy with warfarin for a goal international normalized ratio (INR) of 2-3. This target range is established for effective treatment of deep vein thrombosis (DVT), balancing anticoagulation efficacy with bleeding risk.
B: Oral anticoagulant therapy with warfarin for a goal INR of 2.5-3.5. This range is too high for DVT treatment, increasing the risk of serious bleeding complications unnecessarily.
C: Oral anticoagulant therapy with aspirin for a goal INR of 2-3. Aspirin is not a suitable anticoagulant for DVT management as it lacks the necessary properties to effectively prevent thrombus formation.
The client asks about side effects of taking digoxin. How does the nurse respond?
Rationale:
Anorexia can be a side effect of digoxin. This medication can affect gastrointestinal function, leading to a reduced appetite, which is medically recognized as anorexia, thus making it a notable side effect for patients.
B: Tachycardia can be a side effect of digoxin. Digoxin typically slows heart rate, so tachycardia is not a common adverse reaction associated with its therapeutic use.
C: Constipation can be a side effect of digoxin. While gastrointestinal effects are possible, constipation is not specifically linked to digoxin and may arise from other factors.
D: Urinary retention can be a side effect of digoxin. Digoxin does not directly cause urinary retention; instead, its primary effects involve cardiac function rather than urinary dynamics.
A medical student is doing a summer research project that involves administeringß2‚‚-receptor agonists to rats to determine the physiologic changes. Which of the following would be expected following steady state intravenous dosing of agent X, aß2‚‚-receptor agonist?
Rationale:
B: Hyperglycemia. Steady-state intravenous dosing of a ß2-receptor agonist like agent X typically stimulates glycogenolysis and gluconeogenesis in the liver, leading to an increase in blood glucose levels, thus causing hyperglycemia.
A: Bronchoconstriction. ß2-receptor agonists primarily induce bronchodilation, not bronchoconstriction, by relaxing bronchial smooth muscle, which counters any potential constrictive responses in the airways.
C: Hypertension. While some adrenergic responses can influence blood pressure, ß2-receptor agonists predominantly cause vasodilation in peripheral vessels, which would not directly result in hypertension.
D: Uterine spasm. ß2-receptor agonists are known to relax uterine smooth muscle rather than induce spasm, making them useful in certain obstetric scenarios to delay premature labor.
A 57-year-old man with a 40 pack-year history of smoking develops small cell lung cancer. He begins to show signs of hyponatremia, and his urine is highly concentrated. The diagnosis of SIADH is made. Administration of which of the following metal ions may help?
Rationale:
C: Lithium aids in the management of SIADH by inhibiting the action of antidiuretic hormone (ADH) on the kidneys, leading to increased urine output and helping to correct hyponatremia effectively.
A: Cobalt does not have a recognized role in treating SIADH and lacks evidence supporting its efficacy in managing hyponatremia associated with small cell lung cancer.
B: Iron does not impact ADH activity and therefore does not provide therapeutic benefits for SIADH or help in addressing the complications of hyponatremia in affected patients.
D: Magnesium has no established connection to the regulation of ADH or the treatment of SIADH, making it ineffective in addressing the underlying issues of hyponatremia in this scenario.
Anti-platelet drugs include which of the following:
Rationale:
B: Ticlopidine is an anti-platelet drug that inhibits platelet aggregation, thus playing a crucial role in preventing thrombus formation. It is commonly used in patients at risk for cardiovascular events, enhancing blood flow.
A: Nimodipine primarily acts as a calcium channel blocker, targeting cerebral blood vessels rather than platelet function. Its role does not involve anti-platelet activity, focusing instead on managing conditions like subarachnoid hemorrhage.
C: Neostigmine functions as an acetylcholinesterase inhibitor, enhancing cholinergic transmission. Its therapeutic applications are centered around myasthenia gravis and postoperative ileus, not in modifying platelet activity.
D: Pirenzepine is a selective M1 muscarinic antagonist used mainly in treating peptic ulcers. It does not influence platelet function or aggregation, thus lacking any role as an anti-platelet agent.
Under which circumstance should a nurse administer a prn dose of benztropine?
Rationale:
C: When the client exhibits tremors and shuffling gait. Benztropine is an anticholinergic medication primarily used to manage extrapyramidal symptoms like tremors and rigidity associated with certain medications, particularly in Parkinson's disease.
A: When the client becomes aggressive. Aggression may require different interventions, such as sedatives or behavioral management, rather than specifically targeting motor symptoms with benztropine.
B: When the client needs to be calmed down before bedtime. While calming is important, benztropine specifically addresses movement disorders, not general anxiety or sleep issues, making it unsuitable for this situation.
D: When the client complains of constipation. Constipation is not an indication for benztropine, as this medication does not alleviate gastrointestinal issues and could even exacerbate such symptoms due to its anticholinergic effects.
What should the nurse do when a patient is taking furosemide?
Rationale:
Assess blood pressure before administration. Monitoring blood pressure is crucial when a patient is on furosemide, as it can cause significant changes in fluid balance and hemodynamics, potentially leading to hypotension.
A: Instruct the patient to change positions quickly when getting out of bed. Rapid position changes can lead to dizziness or falls, especially in patients on diuretics, increasing the risk of injury.
C: Administer the drug at bedtime for maximum effectiveness. Timing furosemide administration at night can disrupt sleep due to increased urination, counteracting its therapeutic benefits during waking hours.
D: None. This option does not provide any actionable guidance, neglecting essential nursing responsibilities required for safe patient care while on furosemide.
A nurse who administers antipsychotic medication should be ready to explain which neurotransmitters and how they are processed in the brain?
Rationale:
B: Serotonin and dopamine. Antipsychotic medications primarily target dopamine pathways in the brain while also influencing serotonin levels, which are crucial in managing symptoms of psychotic disorders.
A: Dopamine and GABA. While dopamine is relevant in antipsychotic treatment, GABA does not play a primary role in the mechanism of action for these medications.
C: Synaptic neurovesicles and neurodendrites. This option refers to structures involved in neurotransmission but does not specify neurotransmitters pertinent to antipsychotic medication effects.
D: Monoamine oxidase inhibitors and serotonin. Monoamine oxidase inhibitors are a different class of medication and do not directly relate to the primary neurotransmitters targeted by antipsychotics.
The nurse is presenting a substance-abuse lecture for teenage girls and is asked about “roofies.†The nurse recognizes that this is the slang term for which substance?
Rationale:
Flunitrazepam is the slang term "roofies," commonly associated with its use as a date-rape drug. This substance, a powerful sedative, can incapacitate individuals, making it particularly dangerous in social settings.
A: cocaine Cocaine is a stimulant that increases energy and alertness, significantly differing from the sedative effects of flunitrazepam, which is known for causing drowsiness and confusion.
C: secobarbital Secobarbital is a barbiturate that depresses the central nervous system, but it is not referred to as "roofies," which specifically denotes flunitrazepam's notorious use.
D: methamphetamine Methamphetamine is a potent stimulant that leads to increased alertness and energy, contrasting sharply with the sedative nature of flunitrazepam, which induces sleepiness and relaxation.
Which of the following instructions regarding lithium therapy should be included in a nurse’s discharge teaching? (Select the one tha does not apply.)
Rationale:
Avoiding sodium restriction is crucial in lithium therapy, as maintaining adequate sodium levels helps prevent lithium toxicity. A consistent sodium intake supports the drug's efficacy and mitigates side effects, ensuring patient safety.
A: Avoid excessive use of beverages containing caffeine. Caffeine can potentially increase lithium levels, leading to adverse effects, making this advice essential for safe lithium therapy management.
B: Maintain a consistent sodium intake. Consistency in sodium consumption is vital for lithium stability, preventing fluctuations that could lead to toxicity or reduced effectiveness, thus making this guidance relevant.
C: Consume at least 2,500 to 3,000 mL of fluid per day. Adequate hydration helps dilute lithium levels, reducing the risk of toxicity; therefore, this recommendation is critical for safe treatment.
What does the nurse know to be correct concerning the use of mannitol in patients?
Rationale:
It decreases intracranial pressure. Mannitol is an osmotic diuretic that effectively reduces intracranial pressure by drawing fluid out of the brain tissue, promoting fluid excretion through the kidneys, and thereby alleviating pressure-related complications.
B: It increases intraocular pressure. Mannitol is primarily used to decrease pressure, not increase it; therefore, it does not contribute to heightened intraocular pressure.
C: It causes sodium and potassium retention. Mannitol functions as a diuretic, encouraging the excretion of sodium and potassium rather than leading to their retention within the body.
D: It causes diuresis in several days. Mannitol acts rapidly, typically inducing diuresis within hours, not days, making this statement inaccurate regarding the expected response time.
A nurse is caring for a female diagnosed with a mental disorder who has been prescribed medication. Which fact will most impact the nurse’s assessment for possible side effects?
Rationale:
Women are at higher risk for tardive dyskinesia while taking conventional antipsychotic medications. This fact highlights the importance of monitoring female patients closely for this specific side effect, which can significantly impact their quality of life and treatment efficacy.
B: Women experience more severe side effects than men while taking atypical antidepressants. While severity of side effects varies, this statement does not directly address the unique risk of tardive dyskinesia associated with conventional antipsychotics.
C: Women are more susceptible to developing a dependence on most psychiatric medications than are men. Dependence is a concern, but it does not specifically pertain to the evaluation of tardive dyskinesia related to antipsychotic medications.
D: Women are less susceptible to developing the common side effects of antipsychotic medications than are men. This contradicts established knowledge, as studies indicate that women often face increased risks for certain side effects, including tardive dyskinesia.
A patient has been taking naltrexone (ReVia) as part of the treatment for addiction to heroin. The nurse expects that the naltrexone will have which therapeutic effect for this patient?
Rationale:
Naltrexone prevents the euphoric effects of opioids, ensuring that if a patient uses heroin while on the medication, they will not experience the desired high, thus aiding in addiction treatment.
A: Naltrexone prevents the cravings for opioid drugs. While naltrexone mitigates the effects of opioids, its primary role is to block the euphoric response rather than directly suppress cravings.
B: Naltrexone works as a safer substitute for the heroin until the patient completes withdrawal. Naltrexone does not serve as a substitute; it actively blocks the effects of opioids, facilitating recovery.
C: The patient will experience flushing, sweating, and severe nausea if he takes heroin while on naltrexone. Although some side effects can occur, the primary therapeutic effect is blocking euphoria rather than causing adverse reactions.
A patient is in an urgent-care center with an acute asthma attack. The nurse expects that which medication will be used for initial treatment?
Rationale:
B: A short-acting beta2 agonist such as albuterol (Proventil) is the first-line treatment for acute asthma attacks due to its rapid bronchodilation effect, providing immediate relief from airway constriction and improving breathing.
A: An anticholinergic such as ipratropium (Atrovent) serves as an adjunct therapy rather than a primary treatment and does not provide the quick relief necessary during an acute asthma episode.
C: A long-acting beta2 agonist such as salmeterol (Serevent) is inappropriate for acute situations as it is intended for maintenance therapy, not for immediate symptom relief during an asthma attack.
D: A corticosteroid such as fluticasone (Flovent) takes time to exert its anti-inflammatory effects and is not suitable for urgent relief in the face of an acute asthma attack.
The situation when failure to continue administering the drug results in serious psychological and somatic disturbances is called?
Rationale:
Abstinence syndrome describes the situation when failure to continue administering the drug results in serious psychological and somatic disturbances. This syndrome occurs when dependence on a substance leads to withdrawal symptoms upon cessation.
A: Tachyphylaxis involves a rapid decrease in drug response due to frequent administration, not a withdrawal phenomenon resulting from stopping the drug entirely.
B: Sensibilization refers to an increased response to a drug after repeated exposure, contrasting with the concept of withdrawal and its associated disturbances.
D: Idiosyncrasy denotes an abnormal reaction to a drug that is unique to an individual, not related to the withdrawal symptoms experienced after stopping drug administration.
The effect of the drug on parasympathetic function declines rapidly in all organs EXCEPT:
Rationale:
The eye experiences a slower decline in parasympathetic function compared to other organs. This is due to its unique anatomical and physiological characteristics, which maintain a more prolonged response to the drug's effects, allowing for sustained activity in the pupil and lens.
B: Heart The heart exhibits a rapid decline in parasympathetic function, as the drug's effects diminish quickly, leading to increased heart rate and reduced vagal tone.
C: Smooth muscle organs Smooth muscle organs respond swiftly to the drug, resulting in a rapid decrease in parasympathetic activity, which leads to decreased contraction and motility in these areas.
D: Glands Glands show a quick reduction in parasympathetic function, causing a rapid decrease in secretion rates and overall glandular activity due to the drug's diminishing effects.
Which of the following sympathomimetics is preferable for the emergency therapy of cardiogenic shock?
Rationale:
Dobutamine is preferable for the emergency therapy of cardiogenic shock.
Dobutamine primarily acts as a positive inotrope, enhancing cardiac contractility without significantly increasing heart rate or causing excessive vasoconstriction, making it ideal for managing cardiogenic shock effectively and safely.
A: Epinephrine Stimulates alpha and beta receptors, causing increased heart rate and vasoconstriction, which may lead to excessive myocardial oxygen demand and worsen the patient’s condition.
C: Isoproterenol Primarily acts on beta receptors, leading to increased heart rate and reduced vascular resistance, which can compromise cardiac output during cardiogenic shock and is less effective than dobutamine.
D: Methoxamine Functions mainly as a selective alpha-agonist, resulting in increased blood pressure but lacks the necessary inotropic support for the failing heart seen in cardiogenic shock.
Which of the following hypnotic drugs is used intravenously as anesthesia?
Rationale:
Thiopental is used intravenously as anesthesia. This barbiturate acts rapidly, inducing unconsciousness for surgical procedures, making it a preferred choice in anesthesia practice due to its quick onset of action.
B: Phenobarbital primarily serves as an anticonvulsant rather than an anesthetic agent, focusing on seizure control instead of inducing anesthesia for surgical interventions, limiting its application in this context.
C: Flurazepam is mainly utilized for treating insomnia, providing sedative effects rather than anesthesia. Its use is inappropriate for surgical settings where rapid unconsciousness is required.
D: Zolpidem is specifically indicated for short-term insomnia treatment and lacks the necessary properties to be employed as an anesthetic agent in intravenous settings for any surgical procedures.
The principal central nervous system effect of the opioid analgesics with affinity for a mu receptor is:
Rationale:
Analgesia, respiratory depression, and euphoria are all principal central nervous system effects of opioid analgesics with mu receptor affinity. This multifaceted impact characterizes their pharmacological profile and therapeutic applications.
A: Analgesia Only highlights one of the multiple central effects opioids exert, neglecting the significant respiratory depression and euphoria also associated with mu receptor activation.
B: Respiratory depression Focuses solely on a critical but singular effect, overlooking analgesia and euphoria, which are equally important components of opioid action on the central nervous system.
C: Euphoria Limits the scope by addressing only the pleasurable aspect of opioid effects, disregarding the essential roles of analgesia and respiratory depression in their overall central nervous system influence.
Which of the following antidepressants is a selective serotonin reuptake inhibitor?
Rationale:
Fluoxetine is a selective serotonin reuptake inhibitor. This medication specifically targets the serotonin transporter, enhancing serotonin levels in the synaptic cleft, which is essential for alleviating symptoms of depression.
A: Phenelzine This agent is a monoamine oxidase inhibitor, which functions by preventing the breakdown of neurotransmitters, rather than selectively inhibiting serotonin reuptake.
B: Desipramine As a tricyclic antidepressant, desipramine impacts multiple neurotransmitters but does not selectively inhibit serotonin reuptake, thus differing from SSRIs like fluoxetine.
C: Maprotiline This drug is a tetracyclic antidepressant that primarily affects norepinephrine reuptake, lacking the selective action on serotonin that characterizes SSRIs such as fluoxetine.
Substances causing narco- and glue sniffings are all of the following EXCEPT:
Rationale:
Substances causing narco- and glue sniffings are all of the following EXCEPT antipsychotic drugs. Antipsychotic medications primarily target severe mental disorders and do not produce the euphoric or intoxicating effects associated with inhalants and similar substances, making them distinct from the other categories listed.
A: Stimulants These substances elevate mood and energy levels, often leading to misuse in contexts similar to glue sniffing, where individuals seek heightened sensations or altered consciousness.
C: Psychedelics These compounds alter perception and cognition, drawing users to seek mind-expanding experiences, which can overlap with the motivations behind substance abuse in inhalant use scenarios.
D: Sedative drugs Sedatives induce relaxation and drowsiness, attracting users who want to escape reality or relieve stress, paralleling the allure of inhalants for similar calming effects.
Choose an emetic drug of central action:
Rationale:
Apomorphine hydrochloride is an emetic drug of central action. This medication stimulates the chemoreceptor trigger zone in the brain, effectively inducing vomiting, making it suitable for treating certain types of poisoning.
A: Ipecacuanha derivatives Primarily induce vomiting through peripheral mechanisms, acting directly on the gastrointestinal tract rather than central pathways, which limits their use in specific toxicological situations.
B: Promethazine Functions mainly as an antihistamine with antiemetic properties, but it does not act as an emetic. Its role is to prevent nausea rather than induce vomiting.
C: Tropisetron Primarily serves as an antiemetic by blocking serotonin receptors, alleviating nausea and vomiting, but it does not induce vomiting, thus not fitting the emetic classification.
All these drug groups useful in angina both decrease myocardial oxygen requirement (by decreasing the determinations of oxygen demand) and increase myocardial oxygen delivery (by reversing coronary arterial spasm), EXCEPT:
Rationale:
D: Potassium channel openers (Minoxidil) do not exert the dual effect of reducing myocardial oxygen demand and enhancing oxygen delivery, as their primary action is unrelated to coronary artery function in angina.
A: Nitrates and nitrite drugs (Nitroglycerin, Isosorbide dinitrate) effectively alleviate angina by dilating coronary arteries and decreasing myocardial oxygen demand, meeting both criteria specified in the question.
B: Calcium channel blockers (Nifedipine, Nimodipine) contribute to angina relief through vasodilation and decreased contractility, thereby lowering oxygen consumption while improving oxygen supply, fulfilling both conditions outlined.
C: Beta-adrenoceptor-blocking drugs (Atenolol, Metoprolol) primarily reduce heart rate and contractility, diminishing oxygen demand significantly, while they also improve oxygen delivery through better perfusion, matching the requirements.
Vasopressin possesses the following:
Rationale:
Vasopressin possesses antidiuretic property. This hormone functions primarily to regulate water retention in the body, reducing urine output by increasing water reabsorption in the kidneys, thus maintaining fluid balance.
B: Vasodilatation property. Vasopressin primarily induces vasoconstriction, not vasodilation, which is contrary to its established physiological role in blood pressure regulation and fluid retention.
C: Release of a thyroid hormone into the plasma. Vasopressin does not influence thyroid hormone secretion; its primary function relates to water balance and vascular resistance, unrelated to thyroid activity.
D: Diuretic property. Rather than promoting diuresis, vasopressin acts to decrease urine production, counteracting diuretic effects by enhancing water reabsorption in the renal system.
Ketoprofen is a propionic acid derivative that inhibits both cyclooxygenase (nonselectively) and lipoxygenase. This statement is:
Rationale:
Ketoprofen is a propionic acid derivative that inhibits both cyclooxygenase (nonselectively) and lipoxygenase. This statement is TRUE.
Ketoprofen's classification as a propionic acid derivative and its mechanism of action involving nonselective inhibition of cyclooxygenase and inhibition of lipoxygenase confirm the accuracy of the statement. These properties contribute to its effectiveness in managing pain and inflammation, supporting the truth of the assertion provided in the question.
B: FALSE This option fails to recognize that ketoprofen indeed functions as a nonselective cyclooxygenase inhibitor and also inhibits lipoxygenase, making it a misrepresentation of its pharmacological action.
C: None This choice does not align with the factual statement provided, as it ignores the verifiable details about ketoprofen's classification and its inhibitory effects, thus lacking relevance.
D: All of the above This selection suggests that multiple options can be correct simultaneously, which contradicts the singular truth of the statement regarding ketoprofen's properties and actions in this context.
Which of the following antivitamins prevent a vitamin K from exerting its typical metabolic effects?
Rationale:
All of the above. Each of these antivitamins disrupt the normal metabolic functions of vitamin K through different mechanisms, collectively inhibiting its ability to support coagulation and other essential processes in the body.
A: Cholestiramine. This compound binds bile acids, potentially reducing absorption of vitamin K and thereby diminishing its availability for metabolic activities.
B: Coumarins. They act as vitamin K antagonists, interfering with its metabolism and preventing the synthesis of vitamin K-dependent clotting factors.
C: Antibiotics. Certain antibiotics can disrupt gut microbiota, leading to decreased synthesis and absorption of vitamin K, impairing its metabolic effects.
Which of the following statements refers to cholecalciferol:
Rationale:
D: Mechanism of action: 1. Genomic effects 2. Cytoplasmic effects. Cholecalciferol, or vitamin D3, exerts its effects through both genomic pathways, influencing gene expression, and cytoplasmic actions, facilitating calcium absorption and metabolism.
A: Frequent monitoring of both calcium and phosphorus serum levels is necessary in case of intravenous administration. This statement is more relevant to therapies involving calcium or phosphorus supplements rather than cholecalciferol specifically.
B: Has potent anti-osteoclast activity – mechanism unknown. While cholecalciferol influences bone metabolism, its primary role is not directly linked to anti-osteoclast activity, which is not its defining characteristic.
C: Can usually lower serum calcium levels in 48 hours. Cholecalciferol typically functions to raise calcium levels, promoting absorption rather than lowering them, contradicting the physiological role of vitamin D.
All of antibiotics are aminoglycosides, EXCEPT:
Rationale:
C: Clindamycin. Clindamycin is not an aminoglycoside; it belongs to the lincosamide class of antibiotics, which have a different mechanism of action compared to aminoglycosides like gentamycin and streptomycin.
A: Gentamycin. Gentamycin is classified as an aminoglycoside, well-known for its efficacy against a variety of bacterial infections through its unique protein synthesis inhibition mechanism.
B: Streptomycin. Streptomycin is also an aminoglycoside, primarily used to treat tuberculosis and certain bacterial infections due to its effectiveness in disrupting bacterial protein synthesis.
D: Neomycin. Neomycin belongs to the aminoglycoside family, commonly utilized in topical formulations for its potent antibacterial properties, particularly against gram-negative bacteria.
Tick the drug for cestodosis (tapeworm invasion) treatment:
Rationale:
Praziquantel is the drug for cestodosis treatment. This medication effectively targets and disrupts the integument of tapeworms, leading to their paralysis and subsequent elimination from the host's body, making it the preferred choice for treating such infections.
A: Piperazine primarily treats nematode infections and lacks efficacy against cestodes, rendering it unsuitable for tapeworm infestations and their specific therapeutic needs.
C: Pyrantel is effective against certain roundworms but does not target tapeworms, thus failing to provide the necessary treatment for cestodosis.
D: Ivermectin is mainly used for parasitic infections caused by nematodes and ectoparasites, lacking the specific action required to combat tapeworms effectively.
Which of the following actions most likely mediated the therapeutic effect of both drugs in the patient's disease?
Rationale:
D: Upregulation of hepatic low-density lipoprotein (LDL) receptors. This action enhances the liver's ability to clear LDL cholesterol from the bloodstream, significantly improving lipid profiles and reducing cardiovascular risks associated with the patient's condition.
A: Decreased intestinal reabsorption of bile acids. While this may impact cholesterol metabolism, it does not directly address the therapeutic mechanism that lowers LDL cholesterol levels effectively in this context.
B: Decreased conversion of cholesterol to bile acids. This process does not facilitate the reduction of circulating LDL levels; instead, it may lead to increased cholesterol availability rather than its clearance from the bloodstream.
C: Decreased synthesis of cholesterol by the liver. Although reducing cholesterol production is beneficial, this choice overlooks the crucial role of LDL receptor upregulation in efficiently removing LDL from circulation.
A patient to be commenced on oral anticoagulant therapy for DVT would be treated with
Rationale:
Oral anticoagulant therapy with warfarin for a goal international normalized ratio (INR) of 2-3. This target INR range is clinically validated as effective for preventing recurrent deep vein thrombosis (DVT) while minimizing the risk of bleeding complications associated with anticoagulation therapy.
B: Oral anticoagulant therapy with warfarin for a goal INR of 2.5-3.5. This higher INR range increases the likelihood of adverse bleeding events, making it unsuitable for standard DVT treatment.
C: Oral anticoagulant therapy with aspirin for a goal INR of 2-3. Aspirin is not an appropriate anticoagulant for DVT management and does not achieve the desired anticoagulation effects needed for treatment.
The client asks about side effects of taking digoxin. How does the nurse respond?
Rationale:
Anorexia can be a side effect of digoxin. This medication is known to affect the gastrointestinal system, leading to symptoms such as decreased appetite, which may manifest as anorexia in some patients using digoxin.
B: Tachycardia can be a side effect of digoxin. Although digoxin can influence heart rate, it typically causes bradycardia, not tachycardia, making this option misleading regarding digoxin's physiological effects.
C: Constipation can be a side effect of digoxin. While gastrointestinal disturbances can occur, constipation is not a widely recognized or common side effect associated with digoxin therapy, rendering this choice inaccurate.
D: Urinary retention can be a side effect of digoxin. Urinary retention is not typically associated with digoxin, as its primary action involves heart function rather than affecting urinary patterns, making this statement misleading.
A medical student is doing a summer research project that involves administeringß2‚‚-receptor agonists to rats to determine the physiologic changes. Which of the following would be expected following steady state intravenous dosing of agent X, aß2‚‚-receptor agonist?
Rationale:
Hyperglycemia would be expected following steady state intravenous dosing of agent X, a ß2-receptor agonist.
This outcome occurs because ß2-receptor agonists stimulate glycogenolysis and gluconeogenesis in the liver, leading to increased blood glucose levels. The enhanced adrenergic signaling promotes metabolic shifts that elevate glucose availability for energy, particularly during physiological stress or exercise, which is consistent with the pharmacological action of ß2-agonists.
A: Bronchoconstriction would not occur, as ß2-receptor agonists typically lead to bronchial dilation rather than constriction, promoting airway relaxation and improved airflow in the lungs.
C: Hypertension is unlikely since ß2-receptor agonists primarily induce vasodilation in blood vessels, leading to reduced vascular resistance and potentially lowering blood pressure instead of causing an increase.
D: Uterine spasm is not expected, as ß2-receptor agonists generally relax uterine muscles rather than induce spasms, which would be contrary to their intended therapeutic effects in obstetric settings.
A 57-year-old man with a 40 pack-year history of smoking develops small cell lung cancer. He begins to show signs of hyponatremia, and his urine is highly concentrated. The diagnosis of SIADH is made. Administration of which of the following metal ions may help?
Rationale:
C: Lithium may be beneficial in treating SIADH as it can promote diuresis and increase serum sodium levels, counteracting the effects of excess antidiuretic hormone secretion in patients with this condition.
A: Cobalt does not have a recognized role in managing SIADH and lacks efficacy in correcting sodium imbalances associated with this syndrome.
B: Iron is primarily involved in oxygen transport and metabolism, having no significant impact on fluid balance or sodium levels in patients with SIADH.
D: Magnesium plays a role in numerous biochemical processes but does not directly address the underlying issues of hyponatremia related to SIADH.
Anti-platelet drugs include which of the following:
Rationale:
B: Ticlopidine. Ticlopidine functions as an anti-platelet drug by inhibiting platelet aggregation, thus reducing the risk of thrombotic events. Its mechanism aids in preventing strokes and heart attacks, making it essential in cardiovascular therapy.
A: Nimodipine primarily acts as a calcium channel blocker, used to prevent vasospasm in subarachnoid hemorrhage, lacking direct anti-platelet properties essential for thrombus prevention.
C: Neostigmine serves as a cholinesterase inhibitor, primarily utilized in myasthenia gravis treatment and reversing neuromuscular blockade. It does not possess anti-platelet activity relevant to thrombus management.
D: Pirenzepine is an anticholinergic medication aimed at reducing gastric acid secretion. Its pharmacological profile does not encompass anti-platelet effects, rendering it unsuitable for thrombus-related prevention.
Under which circumstance should a nurse administer a prn dose of benztropine?
Rationale:
When the client exhibits tremors and shuffling gait. Benztropine is an anticholinergic used to manage extrapyramidal symptoms, which include movement disorders such as tremors and rigidity associated with certain medications.
A: When the client becomes aggressive. Aggression does not pertain to the neurological symptoms that benztropine addresses, thus requiring alternative behavioral interventions or medications for management.
B: When the client needs to be calmed down before bedtime. Calming a client before bedtime typically requires sedatives or sleep aids rather than an anticholinergic medication like benztropine, which is not its intended use.
D: When the client complains of constipation. Constipation is not a condition treated by benztropine; it typically requires dietary adjustments or laxatives rather than an anticholinergic medication.
What should the nurse do when a patient is taking furosemide?
Rationale:
B: Assess blood pressure before administration. Monitoring blood pressure is crucial when a patient is on furosemide, as this diuretic can lead to hypotension due to fluid loss, ensuring patient safety.
A: Instruct the patient to change positions quickly when getting out of bed. Rapid position changes can increase the risk of dizziness and falls, especially in patients on diuretics like furosemide.
C: Administer the drug at bedtime for maximum effectiveness. Furosemide can cause increased urination, making nighttime dosing inappropriate as it disrupts sleep and can lead to potential complications.
D: None. This option suggests that no action is necessary, which overlooks the importance of monitoring vital signs like blood pressure to prevent adverse effects from furosemide.
A nurse who administers antipsychotic medication should be ready to explain which neurotransmitters and how they are processed in the brain?
Rationale:
B: Serotonin and dopamine are crucial neurotransmitters involved in mood regulation and psychotic disorders. Antipsychotic medications primarily target these neurotransmitters to alleviate symptoms by modulating their levels and receptor interactions in the brain.
A: Dopamine and GABA. While dopamine is relevant, GABA focuses on inhibitory functions rather than the primary mechanisms targeted by antipsychotic medications, which mainly involve serotonin modulation.
C: Synaptic neurovesicles and neurodendrites. This choice describes components of neuronal structure rather than specific neurotransmitters that antipsychotic medications interact with, making it inappropriate for this context.
D: Monoamine oxidase inhibitors and serotonin. Although serotonin plays a role in mood regulation, monoamine oxidase inhibitors are a different class of medication that does not directly align with typical antipsychotic treatments.
The nurse is presenting a substance-abuse lecture for teenage girls and is asked about “roofies.†The nurse recognizes that this is the slang term for which substance?
Rationale:
Flunitrazepam is the slang term referred to as "roofies."
Flunitrazepam, commonly known as "roofies," is a powerful sedative often associated with drug-facilitated sexual assault due to its incapacitating effects. It is crucial to educate teenagers about its dangers and risks, making this substance relevant to discussions on substance abuse among young girls.
A: cocaine. Cocaine is a stimulant that does not match the sedative properties associated with “roofies” and is not linked to the same misuse context.
C: secobarbital. Secobarbital is a barbiturate that can lead to sedation but lacks the specific notoriety and slang association directly tied to “roofies” in popular culture.
D: methamphetamine. Methamphetamine is a potent stimulant and does not share the same sedative effects or the alarming reputation that “roofies” have among young people.