Adverse Effects-Contraindications Practice Test 1
Adverse Effects-Contraindications NCLEX Practice Test
Adverse Effects-Contraindications, within the NCLEX test plan under Physiological Integrity → Pharmacological and Parenteral Therapies, reflects the core knowledge domains and conceptual competencies directly related to what the exam evaluates. The targeted number of questions is 50; designed with realistic clinical scenarios and conceptual variety to help you identify both your strengths and improvement areas.
This test is the 1st part of the Adverse Effects-Contraindications section. To explore all practice tests under this topic, use the “Back to Main Topic” button at the end of the page.
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In the Adverse Effects-Contraindications Study Cards section, shared by real NCLEX candidates, you’ll find concise summaries and high-yield insights related to the most tested concepts. It’s a perfect space to reinforce challenging topics and sharpen your recall through quick, focused repetitions. Short, powerful, and repeatable!
Adverse Effects-Contraindications Practice Test 1
The physician has ordered daily high doses of aspirin for a client with rheumatoid arthritis. The nurse instructs the client to discontinue the medication and contact the physician if which of the following symptoms occurs?
- Infection of the gums
- Diarrhea for more than one day
- Numbness in the lower extremities
- Ringing in the ears
Explanation: Answer reason: Ringing in the ears (tinnitus) is an early sign of salicylate toxicity from high-dose aspirin. This indicates potentially harmful serum levels and requires the client to stop the medication and notify the physician immediately.
What is the antidote used for toxicity produced by an overdose of magnesium sulfate?
- Calcium carbonate
- Calcium gluconate
- Aluminum hydroxide
- Charcoal
Explanation: Answer reason: Calcium gluconate is the antidote for magnesium sulfate toxicity because it counteracts the neuromuscular and cardiac depressant effects of excess magnesium, rapidly restoring normal muscle and cardiac function.
What is the treatment for magnesium sulfate toxicity in eclampsia?
- Vitamin K injection
- Fibrinogen
- Protamine sulfate
- Calcium gluconate
Explanation: Answer reason: Calcium gluconate reverses the life-threatening neuromuscular and cardiac depression caused by magnesium sulfate toxicity, making it the immediate treatment of choice in eclampsia.
A client with a history of hypertension is prescribed lisinopril. Which potential side effect should the nurse instruct the client to report?
- Dry cough
- Weight gain
- Increased appetite
- Constipation
Explanation: Answer reason: ACE inhibitors (e.g., lisinopril) commonly cause a persistent dry cough due to bradykinin accumulation.
A client has been prescribed morphine sulfate for pain. What is the primary nursing consideration during morphine sulfate therapy?
- Monitor for signs of bleeding.
- Assess for increased intracranial pressure.
- Monitor liver function.
- Monitor respiratory rate.
Explanation: Answer reason: Morphine is an opioid that can cause dose-dependent respiratory depression; the priority nursing action is to monitor respiratory rate and depth and to hold the dose if respirations are depressed.
When teaching a client with tuberculosis who is taking INH about follow-up home care, the nurse should emphasize that a laboratory appointment for which of the following tests is critical?
- Liver function
- Kidney function
- Blood sugar
- Cardiac enzymes
Explanation: Answer reason: Isoniazid (INH) can cause hepatocellular injury and hepatitis; therefore, regular liver function tests are critical.
The physician has ordered intravenous fluids with potassium for a client admitted with gastroenteritis and dehydration. Before adding potassium to the intravenous fluids, the nurse should?
- Assess the urinary output
- Obtain arterial blood gases
- Perform a dextrostick.
- Obtain a stool culture.
Explanation: Answer reason: IV potassium is contraindicated in patients with poor renal function; verify adequate urine output (e.g., >30 mL/hr) to prevent dangerous hyperkalemia.
The client is experiencing symptoms of tardive dyskinesia. The nurse would expect to see?
- Rapid tongue movements
- Uncontrolled hand tremors during meals.
- Behavioral changes
- Repetitive slapping movements
Explanation: Answer reason: Tardive dyskinesia is characterized by involuntary orofacial movements such as tongue protrusion, rapid tongue movements, lip smacking, and chewing motions. This best matches rapid tongue movements.
Which statement is true regarding oxygen administration for a client with chronic obstructive pulmonary disease (COPD) experiencing dyspnea and low PaO2?
- High concentrations of oxygen will cause coughing and dyspnea.
- High oxygen concentrations may inhibit the hypoxic stimulus to breathe.
- Increased oxygen use will cause the client to become dependent on oxygen.
- Administration of oxygen is contraindicated in clients who are using bronchodilators.
Explanation: Answer reason: COPD patients partly rely on the hypoxic drive to breathe; administering high concentrations of oxygen can suppress this drive, leading to hypoventilation and CO2 retention. The other statements are false.
Which of the following drugs should be avoided in patients with diabetes?
- Theophylline
- Terbutaline
- Propranolol
- Salbutamol
Explanation: Answer reason: Nonselective beta-blockers like propranolol can mask hypoglycemia symptoms and inhibit glycogenolysis, increasing the risk and complicating diabetes management; therefore, they should be avoided in diabetic patients.
A client with a history of chronic obstructive pulmonary disease (COPD) has been prescribed oxygen therapy. What nursing intervention is important to prevent oxygen toxicity?
- Administering oxygen continuously.
- Adjust the oxygen flow rate as ordered.
- Providing oxygen through a nasal cannula.
- Encouraging deep breathing exercises
Explanation: Answer reason: To prevent oxygen toxicity, oxygen must be titrated to the lowest effective dose and adjusted strictly according to prescription and monitoring parameters. Continuous or unnecessary high-flow oxygen increases risk; device choice or deep breathing alone does not prevent toxicity.
The physician has prescribed Chloromycetin (chloramphenicol) for a client with bacterial meningitis. Which laboratory report should the nurse monitor most carefully?
- Serum creatinine
- Urine specific gravity
- Complete blood count
- Serum sodium
Explanation: Answer reason: Chloramphenicol can cause serious bone marrow suppression and aplastic anemia. The priority is monitoring for hematologic toxicity via a complete blood count.
Aminoglycosides have the following unwanted effects?
- Pancytopenia
- Hepatotoxicity
- Ototoxicity and nephrotoxicity
- Irritation of the gastrointestinal mucosa
Explanation: Answer reason: Aminoglycosides such as gentamicin are associated with damage to the kidneys and the inner ear.
The dose-related adverse effect of ethosuximide is?
- Gastrointestinal reactions, such as anorexia, pain, nausea, and vomiting
- Exacerbated grand-mal epilepsy
- Transient lethargy or fatigue
- All of the above
Explanation: Answer reason: Ethosuximide commonly causes dose-related GI upset (pain, nausea, vomiting), transient lethargy/fatigue, and can worsen concomitant generalized tonic–clonic (grand mal) seizures; therefore, all listed effects apply.
A newly admitted client has been diagnosed with depression. She complains of "twitching muscles" and a "racing heart," and states she stopped taking Zoloft a few days ago because it was not helping her depression. Instead, she began taking her husband's Parnate. The nurse should immediately assess for?
- Pulmonary edema
- Atrial fibrillation
- Mental status changes
- Muscle weakness
Explanation: Answer reason: Switching from sertraline (an SSRI) to tranylcypromine (Parnate), an MAOI, without a washout risks serotonin syndrome. Early findings include mental status changes (agitation, confusion), along with autonomic hyperactivity and neuromuscular twitching. Therefore, immediate assessment for mental status changes is a priority.
A client with paranoid schizophrenia has an order for Thorazine (chlorpromazine) 400 mg orally twice daily. Which of the following symptoms should be reported to the physician immediately?
- Fever, sore throat, and weakness
- Dry mouth, constipation, and blurred vision.
- Lethargy, slurred speech, and thirst
- Fatigue, drowsiness, and photosensitivity
Explanation: Answer reason: Chlorpromazine can cause agranulocytosis. Fever, sore throat, and weakness suggest infection or neutropenia and require immediate provider notification. The other options list common, less urgent side effects (anticholinergic effects, sedation, photosensitivity).
What is the most common side effect of lamotrigine?
- Weight gain
- Tremors
- Neutropenia
- Skin rash
Explanation: Answer reason: Lamotrigine commonly causes a rash, with a risk of serious reactions like Stevens–Johnson syndrome. Weight gain, tremors, and neutropenia are not common effects.
Which medication prescription should the nurse question for a client with type 2 diabetes mellitus?
- Metformin
- Glipizide
- Prednisone
- Sitagliptin
Explanation: Answer reason: Prednisone is a glucocorticoid that increases blood glucose and can precipitate hyperglycemia; its use should be questioned in a client with type 2 diabetes. Metformin, glipizide, and sitagliptin are antidiabetic agents.
Which of the following is a complication of tocolytic agents?
- Uterine rupture
- Hyperstimulation of the uterus
- Increased peristaltic movement
- Pulmonary edema
Explanation: Answer reason: Tocolytics—especially beta-agonists like terbutaline—can cause maternal cardiovascular and pulmonary complications, notably pulmonary edema. Uterine rupture and hyperstimulation are linked to uterotonics, not tocolytics.
What is the reason for stopping the injection of Ceftriaxone and Sulbactam?
- Vomiting
- Urinary infection
- Bleeding
- Antibiotics
Explanation: Answer reason: Active bleeding indicates a serious adverse effect and a contraindication to continuing ceftriaxone–sulbactam, and warrants stopping the medication and notifying the provider. The other options are not valid reasons to stop therapy.
A client has been prescribed hydrochlorothiazide for hypertension. What dietary education should the nurse provide regarding hydrochlorothiazide?
- Increase sodium intake.
- Avoid foods high in potassium.
- Consume a diet rich in magnesium.
- Monitor for signs of fluid retention.
Explanation: Answer reason: Hydrochlorothiazide is a thiazide diuretic that can cause loss of potassium and magnesium. Patients should not avoid potassium; instead, increasing intake of magnesium-rich foods helps prevent hypomagnesemia, making magnesium-focused dietary teaching the best choice among the options provided.
The nurse is assessing a client who is on long-term glucocorticoid therapy. Which of the following findings would the nurse expect?
- Buffalo hump
- Increased muscle mass
- Peripheral edema
- Jaundice
Explanation: Answer reason: Chronic glucocorticoid use can cause iatrogenic Cushing syndrome with abnormal fat distribution, including a dorsocervical fat pad (buffalo hump) and truncal obesity. It does not increase muscle mass; instead, it causes muscle wasting. Jaundice and significant peripheral edema are not expected to be hallmark findings.
The nurse is performing discharge teaching for a client who is on isoniazid (INH). Which diet selection would let the nurse know that the teaching has been ineffective?
- Tuna casserole
- Ham salad sandwich
- Baked potato
- Broiled beef roast
Explanation: Answer reason: Isoniazid can interact with tyramine-rich foods, potentially causing headache and hypertension. Cured and aged meats like ham are high in tyramine, indicating ineffective teaching. The other choices are acceptable.
A client is admitted to the surgical unit following a transurethral prostatectomy (TURP). The nurse administers a B&O suppository to help prevent bladder spasms. The nurse would observe the client for?
- Insomnia and hyperactivity
- Physiological dependence on the drug.
- Nausea and vomiting
- Diarrhea and abdominal cramping
Explanation: Answer reason: B&O (belladonna and opium) suppositories combine an anticholinergic with an opioid. Common adverse effects include sedation and gastrointestinal upset, such as nausea and vomiting. Diarrhea is unlikely (opioids cause constipation); insomnia or hyperactivity is not typical, and dependence is not an immediate concern after a single dose.
All of the following drugs are used in the treatment of severe congestive heart failure, except?
- Verapamil
- Digoxin
- Dobutamine
- Dopamine
Explanation: Answer reason: Verapamil (a non-dihydropyridine calcium channel blocker) has negative inotropic effects and is contraindicated in severe heart failure, whereas digoxin, dobutamine, and dopamine are positive inotropes used in acute decompensated heart failure.
Which of the following symptoms contraindicate the use of haloperidol (Haldol) and warrant withholding the dose?
- Drowsiness, lethargy, and inactivity
- Dry mouth, nasal congestion, and blurred vision
- Rash, blood dyscrasias, and severe depression
- Hyperglycemia, weight gain, and edema.
Explanation: Answer reason: Severe depression is a contraindication to haloperidol, and a rash or blood dyscrasia is a serious adverse reaction; its presence warrants withholding the dose and notifying the provider.
Prior to administering tPA (alteplase) to a client admitted for a cerebrovascular accident (CVA), it is critical that the nurse assess?
- Neurological signs
- Mental status
- Blood pressure
- PT/PTT
Explanation: Answer reason: Before thrombolytic therapy with tPA, coagulation studies (PT/PTT/INR) must be checked to rule out bleeding risk and contraindications. Other assessments are important but are not the critical prerequisite.
A child is treated with calcium disodium edetate (calcium EDTA) for lead poisoning. Which of the following must the nurse assess first?
- Serum potassium level
- Blood calcium level
- Urinary output
- Deep tendon reflexes
Explanation: Answer reason: Calcium disodium EDTA is nephrotoxic; the priority assessment is to monitor renal function by measuring urine output.
The nurse is assessing a client who has been taking Haldol (haloperidol) for several months. Which of the following is a side effect of this medication and must be reported immediately to the physician?
- Muscle flaccidity
- Dystonic reaction
- Mood swings
- Dry, harsh cough.
Explanation: Answer reason: Haloperidol can cause acute dystonia (an extrapyramidal reaction), which may threaten the airway and requires immediate reporting and treatment with anticholinergics.
Which of the following lab studies should be performed periodically if the client is taking warfarin sodium (Coumadin)?
- Stool specimen for occult blood.
- White blood cell count
- Blood glucose
- Erythrocyte count
Explanation: Answer reason: Warfarin increases risk of bleeding; periodic fecal occult blood testing helps detect occult GI bleeding. WBC and glucose are unrelated, and erythrocyte count is less sensitive and nonspecific for occult bleeding.
The doctor has prescribed Exelon (rivastigmine) for the client with Alzheimer's disease. Which side effect is most often associated with this drug?
- Urinary incontinence
- Headaches
- Confusion
- Nausea
Explanation: Answer reason: Rivastigmine is a cholinesterase inhibitor. The most common adverse effects are gastrointestinal, particularly nausea and vomiting.
A client is being discharged on Coumadin after hospitalization for a deep vein thrombosis. Which food would the nurse recognize should be restricted while the client is on this medication?
- Lettuce
- Apples
- Potatoes
- Macaroni
Explanation: Answer reason: Warfarin’s effect is reduced by foods high in vitamin K. Leafy greens, like lettuce, are rich in vitamin K and should be limited or kept consistent, unlike apples, potatoes, or macaroni.
A patient prescribed oral cyclosporine should be advised to avoid?
- Meat
- Eggs
- Grapefruit juice
- Green leafy vegetables
Explanation: Answer reason: Grapefruit juice inhibits CYP3A4, increasing cyclosporine levels and the risk of toxicity (e.g., nephrotoxicity).
A patient's potassium is 6.2. Their renal function is normal. You are reviewing their home medications. Which of the following would be least likely to cause a potassium of 6.2?
- HCTZ
- Spironolactone
- Lisinopril
- Losartan
Explanation: Answer reason: HCTZ (a thiazide diuretic) tends to lower serum potassium, causing hypokalemia. Spironolactone is potassium-sparing, and ACE inhibitors (lisinopril) and ARBs (losartan) can increase potassium, making them more likely causes of hyperkalemia.
Which medication on the client's list requires follow-up with the primary healthcare provider when the client is newly prescribed warfarin?
- Loratadine
- Saw palmetto
- Furosemide
- Pantoprazole
Explanation: Answer reason: Saw palmetto has antiplatelet and anticoagulant effects and can potentiate warfarin, increasing bleeding risk; it requires provider follow-up. The other listed drugs have minimal interaction with warfarin.
Which of the following medications is least likely to have anticholinergic effects?
- Atropine
- Diphenhydramine (Benadryl)
- Metoclopramide (Reglan)
- Scopolamine
Explanation: Answer reason: Atropine and scopolamine are antimuscarinics, and diphenhydramine has strong anticholinergic properties. Metoclopramide is a dopamine antagonist prokinetic with minimal or no anticholinergic effect, making it the least likely.
A client is prescribed amitriptyline for depression. What is the primary nursing consideration during amitriptyline therapy?
- Monitor for signs of bleeding.
- Assess for increased intracranial pressure.
- Monitor liver function
- Monitor for anticholinergic effects.
Explanation: Answer reason: Amitriptyline is a tricyclic antidepressant with prominent anticholinergic adverse effects (dry mouth, constipation, urinary retention, blurred vision, tachycardia). Monitoring and teaching about these effects are the primary nursing considerations.
A patient has taken a drug due to which he is developing deafness. Identify that drug from the following?
- Ketoconazole
- 5-fluorouracil
- Doxycycline
- Both A and B
Explanation: Answer reason: Ototoxicity, leading to hearing problems, is classically linked to some antibiotics. Among the listed options, Ketoconazole (a tetracycline) can cause vestibular or ototoxic adverse effects, whereas ketoconazole and 5-fluorouracil are not associated with deafness.
A hypertensive client is started on atenolol (Tenormin). The nurse instructs the client to report immediately?
- Rapid breathing
- Slow, bounding pulse
- Jaundiced sclera
- Weight gain
Explanation: Answer reason: Atenolol is a beta blocker that can cause bradycardia. A slow, bounding pulse indicates potentially dangerous bradycardia and should be reported immediately.
Which laboratory test result should the nurse monitor in a client receiving fondaparinux?
- INR
- PT
- Creatinine
- PTT
Explanation: Answer reason: Fondaparinux is renally eliminated and does not require routine PT/INR or aPTT monitoring. Renal function should be monitored. Check serum creatinine.
Which sign should the nurse monitor in a patient receiving an osmotic diuretic that indicates a risk for dehydration?
- Hypertension
- Weight gain
- Edema
- Dry mucous membranes.
Explanation: Answer reason: Osmotic diuretics promote diuresis and can cause fluid loss. A key sign of dehydration is dry mucous membranes. The other options indicate fluid overload, not dehydration.
A client is prescribed simvastatin for hypercholesterolemia. What laboratory value should the nurse monitor closely during simvastatin therapy?
- Serum potassium level
- Liver function tests
- Blood urea nitrogen (BUN)
- Serum sodium level
Explanation: Answer reason: Statins, including simvastatin, can cause hepatotoxicity. The nurse should monitor liver enzymes (AST and ALT) to detect liver injury during therapy.
A client is prescribed enalapril for hypertension. What education should the nurse provide regarding enalapril?
- Take the medication with food.
- Increase potassium intake while on the medication.
- Expect an immediate reduction in blood pressure.
- Report a persistent dry cough to the healthcare provider.
Explanation: Answer reason: ACE inhibitors, like enalapril, commonly cause a persistent dry cough due to bradykinin accumulation and should be reported. Potassium should not be increased because of the risk of hyperkalemia; it does not need to be taken with food; blood pressure reduction is not immediate.
The most common dose-related adverse effects of carbamazepine are?
- Diplopia, ataxia, and nausea
- Gingival hyperplasia, hirsutism
- Sedation; physical and psychological dependence.
- Hemeralopia, myasthenic syndrome
Explanation: Answer reason: Carbamazepine's common dose-related toxicities are neurologic (diplopia, ataxia) and gastrointestinal upset (nausea). Gingival hyperplasia and hirsutism are associated with phenytoin; sedation and dependence are typical of barbiturates and benzodiazepines; hemeralopia and myasthenic syndrome are not characteristic.
A nurse is caring for a client who is receiving methyldopa hydrochloride (Aldomet) intravenously. Which of the following assessment findings would indicate to the nurse that the client may be having an adverse reaction to the medication?
- Headache
- Mood changes
- Hyperkalemia
- Palpitations
Explanation: Answer reason: Methyldopa is a central alpha-2 agonist with CNS adverse effects, such as sedation, depression, and mood changes. These mental status alterations signal an adverse reaction. Hyperkalemia and palpitations are not characteristic adverse effects of methyldopa, and headache is nonspecific.
The client has a prescription for a calcium carbonate compound to neutralize stomach acid. The nurse should assess the client for?
- Constipation
- Hyperphosphatemia
- Hypomagnesemia
- Diarrhea
Explanation: Answer reason: Calcium carbonate antacids commonly cause constipation and can lead to hypercalcemia or kidney stones. They do not cause diarrhea (magnesium salts do), and are not associated with hyperphosphatemia or hypomagnesemia.
A client with hyperthyroidism is taking lithium carbonate to inhibit the release of thyroid hormone. Which complaint by the client should alert the nurse to a problem with the client's medication?
- The client complains of blurred vision.
- The client complains of increased thirst and increased urination.
- The client reports increased weight gain over the past year.
- The client complains of rhinorrhea.
Explanation: Answer reason: Lithium can cause nephrogenic diabetes insipidus, leading to polyuria and polydipsia. Increased thirst and urination signal a medication-related problem requiring evaluation.
Which supplemental medication is most frequently ordered with furosemide (Lasix)?
- Chloride
- Digoxin
- Potassium
- Sodium
Explanation: Answer reason: Furosemide is a loop diuretic that increases urinary potassium loss, risking hypokalemia; potassium supplementation is commonly prescribed to prevent this.
Which laboratory tests should the client receive before prophylactic drug therapy for tuberculosis is started?
- Serum creatinine and blood urea nitrogen (BUN)
- Aspartate aminotransferase (AST, SGOT) and alanine aminotransferase (ALT, SGPT)
- Complete blood count (CBC) and hematocrit.
- Serum potassium level
Explanation: Answer reason: Tuberculosis prophylaxis commonly includes isoniazid (INH) (and sometimes rifampin). INH is associated with hepatotoxicity (asymptomatic transaminase elevation to clinical hepatitis). Baseline liver enzymes (AST/ALT) are needed before therapy to identify pre-existing liver disease and to provide a comparison if symptoms of hepatitis develop (e.g., fatigue, anorexia, nausea, dark urine, jaundice, right upper quadrant pain). Serum creatinine/BUN are not the primary baseline tests for INH prophylaxis, and CBC/hematocrit do not monitor the major serious toxicity of INH. Potassium monitoring is not relevant to TB prophylactic therapy.
A client with AIDS who is receiving antiretroviral therapy tells the nurse he regularly takes echinacea to boost his immune system. The nurse should tell the client:
- Herbals can interfere with the action of antiretroviral medications.
- Supplements have been proven effective in prolonging life.
- Herbals have been shown to decrease the viral load.
- Supplements appear to prevent the replication of the virus.
Explanation: Answer reason: Echinacea and other herbal supplements can interact with antiretroviral medications by altering drug metabolism and effectiveness. There is no evidence that these supplements prolong life, decrease viral load, or prevent viral replication in clients with HIV/AIDS. Because interference with prescribed antiretroviral therapy can reduce treatment effectiveness, clients should be advised accordingly.
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