You choose the safer drug action, the vital sign to check, and the teaching that belongs at the bedside. Five of the 15 questions include the correct answer and rationale. The other ten keep answers in the study hub. Continue with the LPN exams exam guide or more LPN exams practice questions.
Five pharmacology questions with answers
Cover the key. Write the first action. Then open the rationale and name why the other choices fail.
Question 1
Which of the following drugs would be appropriate for the treatment of acute iridocyclitis in a patient with eye pain and vision issues?
A. Indomethacin
B. Apraclonidine
C. Timolol
D. Dexamethasone
Show answer and rationale
Correct answer: D — Dexamethasone
The correct answer is D: Dexamethasone.
1. Acute iridocyclitis is an inflammation of the iris and ciliary body, requiring a potent anti-inflammatory drug like a corticosteroid.
2. Dexamethasone is a potent corticosteroid that helps reduce inflammation in the eye, making it suitable for treating acute iridocyclitis.
3. Indomethacin (A) is a nonsteroidal anti-inflammatory drug (NSAID) which may not be as effective in controlling the inflammation in the eye.
4. Apraclonidine (B) and Timolol (C) are both used to lower intraocular pressure in conditions like glaucoma, not for treating inflammation like in acute iridocyclitis.
In summary, Dexamethasone is the appropriate choice for treating acute iridocyclitis due to its potent anti-inflammatory properties, while the other options are not as effective for this specific condition
Question 2
Which medication is the first-line drug for migraine prevention?
A. Propranolol
B. Topiramate
C. Ergotamine
D. Metoclopramide
Show answer and rationale
Correct answer: A — Propranolol
The correct answer is A: Propranolol. Propranolol is a beta-blocker that has shown efficacy in preventing migraines by reducing the frequency and severity of attacks. It is considered the first-line drug for migraine prevention due to its well-established effectiveness and safety profile. Propranolol works by reducing the excitability of the nervous system and preventing the dilation of blood vessels in the brain, which are key factors in migraine pathophysiology.
Topiramate (B) is also commonly used for migraine prevention, but it is usually considered as a second-line option after propranolol due to its side effects and tolerability issues. Ergotamine (C) is used for acute migraine treatment, not prevention. Metoclopramide (D) is primarily used for treating nausea and vomiting associated with migraines, not for prevention.
Question 3
This graph illustrates the dose-response relationship for the effect of the beta agonist isoproterenol on an isolated perfused heart, both alone and in the presence of different fixed concentrations of Drug X. Based upon the data shown, Drug X is most likely a(n):
A. Beta agonist
B. Competitive antagonist
C. Irreversible antagonist
D. Noncompetitive antagonist
Show answer and rationale
Correct answer: B — Competitive antagonist
The correct answer is B: Competitive antagonist. This can be determined by observing that the presence of Drug X shifts the dose-response curve for isoproterenol to the right without affecting the maximal response. This indicates competitive antagonism, where Drug X competes with isoproterenol for the same receptor site without affecting the efficacy of isoproterenol.
Choice A (Beta agonist) is incorrect because the graph does not show any direct agonistic effect of Drug X. Choice C (Irreversible antagonist) is incorrect because the effect of Drug X is reversible, as shown by the ability of isoproterenol to still elicit a response in the presence of Drug X. Choice D (Noncompetitive antagonist) is incorrect because noncompetitive antagonists typically reduce the maximal response of the agonist, which is not seen in this graph.
Question 4
A patient has experienced insomnia for months, and the physician has prescribed a medication to help with this problem. The nurse expects which drug to be used for long-term treatment of insomnia?
A. secobarbital (Seconal), a barbiturate
B. diazepam (Valium), a benzodiazepine
C. midazolam (Versed), a benzodiazepine
D. eszopiclone (Lunesta), a nonbenzodiazepine sleep aid
Show answer and rationale
Correct answer: D — eszopiclone (Lunesta), a nonbenzodiazepine sleep aid
The correct answer is D: eszopiclone (Lunesta), a nonbenzodiazepine sleep aid. Eszopiclone is a preferred long-term treatment for insomnia due to its lower risk of dependence and tolerance compared to benzodiazepines and barbiturates. Eszopiclone acts on the GABA receptors to promote sleep without causing the same level of sedation or cognitive impairment as benzodiazepines or barbiturates. It is also less likely to cause rebound insomnia upon discontinuation.
Incorrect Choices:
A: secobarbital (Seconal), a barbiturate - Barbiturates have a high potential for tolerance, dependence, and overdose, making them unsuitable for long-term insomnia treatment.
B: diazepam (Valium), a benzodiazepine - Benzodiazepines can lead to tolerance, dependence, and withdrawal symptoms, making them less ideal for long-term insomnia treatment.
Question 5
A nurse is preparing to administer regular insulin and NPH insulin. What is the proper sequence of events the nurse should follow?
A. Inspect the vials for contamination.
B. Withdraw regular insulin first, then NPH.
C. Inject air into the NPH insulin vial first.
D. Roll the NPH insulin vial between the hands to mix.
Show answer and rationale
Correct answer: A — Inspect the vials for contamination.
The correct sequence of events for administering regular insulin and NPH insulin begins with inspecting the vials for contamination to ensure patient safety. Rolling the NPH insulin vial between the hands to mix and injecting air into the NPH insulin vial should follow the inspection step. Afterward, the nurse should inject air into the regular insulin vial and then withdraw the regular insulin first. Option A is the correct answer as it outlines the initial crucial step in the administration process. Option B is incorrect as it provides the incorrect order of withdrawing the insulins. Option C is incorrect as injecting air into the NPH insulin vial should come after inspecting the vials. Option D is incorrect as rolling the NPH insulin vial should be done after inspecting the vials and injecting air into the NPH insulin vial.
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Question 6
The indication for interferon gamma administration is:
A. Idiopathic nephrotic syndrome
B. Hepatitis C virus infection
C. Chronic granulomatous disease
D. Hairy cell leukemia
Correct answer:
Interferon gamma is indicated for Chronic Granulomatous Disease (CGD) due to its role in enhancing the immune response against intracellular pathogens. CGD is a genetic disorder where phagocytes are unable to produce reactive oxygen species, leading to recurrent infections. Interferon gamma helps activate macrophages to improve host defense against pathogens in CGD patients.
Incorrect choices:
A: Idiopathic nephrotic syndrome - Interferon gamma is not indicated for this condition as it is primarily used for immune modulation, not for kidney-related issues.
B: Hepatitis C virus infection - While interferon alpha is used for hepatitis C, interferon gamma is not the primary treatment for this viral infection.
D: Hairy cell leukemia - Interferon alpha is the preferred treatment for hairy cell leukemia, not interferon gamma.
A 60-year-old female with osteoarthritis is prescribed ibuprofen. Ibuprofen works by:
A. Increasing the synthesis of prostaglandins
B. Inhibiting the action of COX enzymes, reducing inflammation and pain
C. Binding to opioid receptors in the brain
D. Blocking the reuptake of serotonin
Correct answer:
The correct answer is B because ibuprofen inhibits the action of COX enzymes, specifically COX-1 and COX-2, which are responsible for the production of prostaglandins. Prostaglandins are lipid compounds that play a key role in inflammation and pain. By inhibiting COX enzymes, ibuprofen reduces the production of prostaglandins, thereby decreasing inflammation and pain.
Choice A is incorrect because ibuprofen actually decreases the synthesis of prostaglandins by inhibiting COX enzymes instead of increasing their synthesis.
Choice C is incorrect because ibuprofen does not bind to opioid receptors in the brain like opioid medications do.
Choice D is incorrect because ibuprofen does not block the reuptake of serotonin, which is a mechanism of action seen in certain antidepressant medications, not NSAIDs like ibuprofen.
A patient has been prescribed warfarin (Coumadin) in addition to a heparin infusion. The patient asks the nurse why he has to be on two medications. The nurseâ„¢s response is based on which rationale?
A. The oral and injection forms work synergistically.
B. The combination of heparin and an oral anticoagulant results in fewer adverse effects
C. Oral anticoagulants are used to reach an adequate level of anticoagulation when heparin alone is unable to do so.
D. Heparin is used to start anticoagulation so as to allow time for the blood levels of warfarin to reach adequate levels.
Correct answer:
The correct answer is D. Heparin is a fast-acting anticoagulant used to immediately start anticocoagulation, while warfarin takes time to reach therapeutic levels. By starting heparin first, it allows time for warfarin to build up in the blood gradually. This ensures continuous anticoagulation without an initial lag period, reducing the risk of clot formation.
A: This is incorrect as the oral and injection forms do not work synergistically. They have different mechanisms of action and are used for different purposes.
B: This is incorrect because combining heparin and an oral anticoagulant does not necessarily result in fewer adverse effects. Adverse effects depend on various factors.
C: This is incorrect as heparin alone can achieve adequate anticoagulation levels. Warfarin is typically added for long-term management.
A client diagnosed with post-traumatic stress disorder is receiving paliperidone (Invega). Which symptoms should a nurse identify that would warrant the need for this medication?
A. Flat affect and anhedonia.
B. Persistent anorexia and 10 lb weight loss in 3 weeks.
C. Flashbacks of killing the enemy.
D. Distant and guarded in relationships.
Correct answer:
The correct answer is C because flashbacks of killing the enemy are indicative of the intrusive symptoms of post-traumatic stress disorder (PTSD), which can be effectively treated with antipsychotic medications like paliperidone. These symptoms are often associated with severe distress and impairment in daily functioning.
Choice A (flat affect and anhedonia) typically aligns more with symptoms of depression rather than PTSD. Choice B (persistent anorexia and weight loss) is more related to physical symptoms rather than the core symptoms of PTSD. Choice D (distant and guarded in relationships) may suggest avoidance symptoms of PTSD, but it does not specifically warrant the use of paliperidone. Therefore, choice C is the most appropriate response based on the symptoms indicative of PTSD that would require this medication.
Clomiphene acts to induce ovulation by which of the following mechanisms?
A. Diminishing ER-mediated negative feedback at the pituitary
B. Increasing the action of ERa in the hypothalamus
C. Increasing the amount of ERa
D. Decreases gonadotropin secretion
Correct answer:
Clomiphene (choice A), a selective estrogen receptor modulator (SERM), induces ovulation by blocking estrogen receptors in the hypothalamus and pituitary, diminishing negative feedback. This increases gonadotropin (FSH/LH) release, stimulating ovarian follicle development, crucial for infertility treatment. Increasing ERa action (choice B) or amount (choice C) would suppress gonadotropins, countering its purpose. Decreasing gonadotropin secretion (choice D) is the opposite effect, as clomiphene boosts it. By disrupting estrogen's inhibitory signal, clomiphene mimics a low-estrogen state, prompting the pituitary to enhance ovulation. This mechanism distinguishes it from other fertility drugs, highlighting its role in anovulatory conditions like polycystic ovary syndrome, where precise hormonal manipulation is key to success.
Clomiphene acts to induce ovulation by which of the following mechanisms?
A. Diminishing ER-mediated negative feedback at the pituitary
B. Increasing the action of ERa in the hypothalamus
C. Increasing the amount of ERa
D. Decreases gonadotropin secretion
Correct answer:
Clomiphene (choice A), a selective estrogen receptor modulator (SERM), induces ovulation by blocking estrogen receptors in the hypothalamus and pituitary, diminishing negative feedback. This increases gonadotropin (FSH/LH) release, stimulating ovarian follicle development, crucial for infertility treatment. Increasing ERa action (choice B) or amount (choice C) would suppress gonadotropins, countering its purpose. Decreasing gonadotropin secretion (choice D) is the opposite effect, as clomiphene boosts it. By disrupting estrogen's inhibitory signal, clomiphene mimics a low-estrogen state, prompting the pituitary to enhance ovulation. This mechanism distinguishes it from other fertility drugs, highlighting its role in anovulatory conditions like polycystic ovary syndrome, where precise hormonal manipulation is key to success.
A 57-year old patient presents to your office complaining about poor appetite, anhedonia, persistent depressed mood and increased sleep latency. He reports chronic neuropathic pain in the feet unrelieved by analgesics. Which of the following medications may address the patient's symptoms of poor sleep, depressed mood, poor appetite and neuropathic pain?
A. Lorazipam
B. Amitriptyline
C. Trazadone
D. Escitalopram
Correct answer:
The correct answer is B: Amitriptyline. This tricyclic antidepressant is commonly used to manage neuropathic pain, improve sleep quality, and treat depression. Amitriptyline can help alleviate the patient's symptoms of poor sleep, depressed mood, poor appetite, and neuropathic pain due to its dual mechanism of action that involves inhibiting the reuptake of serotonin and norepinephrine.
A: Lorazepam is a benzodiazepine used for anxiety and insomnia, but it does not address neuropathic pain or depression symptoms.
C: Trazodone is a sedating antidepressant often used for insomnia, but it may not be as effective for neuropathic pain as amitriptyline.
D: Escitalopram is a selective serotonin reuptake inhibitor (SSRI) used for depression and anxiety, but it may not be as effective for neuropathic pain as amitriptyline.
Which of the following nonopioid agents is an antidepressant with analgesic activity?
A. Fluoxetine
B. Moclobemide
C. Tranylcypramine
D. Amitriptyline
Correct answer:
The correct answer is D: Amitriptyline. Amitriptyline is a tricyclic antidepressant that is commonly used for both depression and chronic pain conditions due to its analgesic properties. It works by increasing the levels of certain neurotransmitters in the brain, such as serotonin and norepinephrine, which can help alleviate both mood symptoms and pain.
Choice A (Fluoxetine) is an SSRI antidepressant that does not have significant analgesic properties. Choice B (Moclobemide) is a reversible MAOI antidepressant that also lacks analgesic effects. Choice C (Tranylcypramine) is an irreversible MAOI antidepressant and does not have analgesic activity.
In summary, amitriptyline is the correct answer because it is an antidepressant with proven analgesic effects, while the other choices do not possess these dual properties.
A client with a history of atrial fibrillation is prescribed warfarin (Coumadin). Which laboratory value should the nurse monitor to assess the effectiveness of the medication?
A. Activated partial thromboplastin time (aPTT)
B. Prothrombin time (PT) and international normalized ratio (INR)
C. Platelet count
D. Erythrocyte sedimentation rate (ESR)
Correct answer:
Prothrombin time (PT) and international normalized ratio (INR) are the laboratory values used to monitor the effectiveness of warfarin therapy. These values help ensure that the client is within the therapeutic range for anticoagulation. PT measures the time it takes for blood to clot, while INR standardizes PT results to minimize variations between laboratories. Monitoring these values is crucial to prevent complications such as bleeding or clot formation. Activated partial thromboplastin time (aPTT) (Choice A) is more commonly used to monitor heparin therapy. Platelet count (Choice C) assesses the number of platelets in the blood and is not specific to warfarin therapy. Erythrocyte sedimentation rate (ESR) (Choice D) is a non-specific marker of inflammation and is not used to monitor the effectiveness of warfarin therapy.
The healthcare provider is teaching a client with hypertension about lifestyle modifications. Which recommendation should the healthcare provider include?
A. Limit alcohol consumption to one drink per day.
B. Increase sodium intake to maintain blood pressure.
C. Exercise vigorously for at least 30 minutes daily.
D. Avoid high potassium foods like bananas.
Correct answer:
Limiting alcohol intake is an essential lifestyle modification recommended for managing hypertension. Excessive alcohol consumption can raise blood pressure, so limiting it to one drink per day is beneficial in controlling hypertension. Alcohol moderation is a key part of a heart-healthy lifestyle for individuals with high blood pressure. Choice B is incorrect because increasing sodium intake can actually worsen hypertension by retaining water and increasing blood pressure. Choice C is incorrect because while exercise is important for overall health, moderate-intensity exercise is recommended for individuals with hypertension to avoid excessive strain on the heart. Choice D is incorrect because high potassium foods like bananas are actually beneficial for individuals with hypertension as they can help lower blood pressure.
LPN exams pharmacology practice questions, set 9 for nursing students in the United States. Fifteen items. Five include answers and rationales in American English.
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