Gulf Exam PrepLICENSING PRACTICE

Clinical Sciences practice

40 questions · untimed. Every drug fact is tied to a DailyMed label. Use Report a mistake on any question if you spot an error.

Read the free Clinical Sciences notes for this quiz — drug tables, antidotes, lab values and worked calculations, with a free PDF.

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All questions in Clinical Sciences practice

  1. A 58-year-old man with type 2 diabetes attends a hospital diabetes clinic. He takes metformin 1 g twice daily. Recent blood tests show eGFR 28 mL/min/1.73 m², with no acute illness. He asks whether he can simply continue his current tablets unchanged. What is the most appropriate action regarding metformin?

    • Continue current metformin dose unchanged
    • Continue metformin and recheck eGFR yearly
    • Stop metformin and review diabetes therapy
    • Double metformin dose and recheck in a month
    Show answer

    Stop metformin and review diabetes therapy. DailyMed metformin labels contraindicate use in eGFR below 30 mL/min/1.73m² due to lactic acidosis risk.

    • Continue current metformin dose unchanged: Incorrect: the label contraindicates metformin below eGFR 30, so continuing unchanged is unsafe.
    • Continue metformin and recheck eGFR yearly: Incorrect: yearly recheck does not address the contraindication at eGFR 28.
    • Double metformin dose and recheck in a month: Incorrect: increasing the dose would increase lactic acidosis risk at eGFR 28.

    Source: DailyMed — METFORMIN HYDROCHLORIDE TABLET, FILM COATED label, 4 Contraindications; 5 Warnings and Precautions — Lactic Acidosis · Read the note for this topic · Report a mistake (sple-cs-001)

  2. A 67-year-old woman with atrial fibrillation is reviewed in an anticoagulation clinic before starting long-term anticoagulant therapy. The prescriber explains that her chosen drug blocks vitamin K recycling, needs regular INR blood tests, and is affected by diet changes. Which drug has she been prescribed?

    • Warfarin
    • Aspirin
    • Clopidogrel
    • Enoxaparin
    Show answer

    Warfarin. Warfarin inhibits VKORC1, reducing factors II, VII, IX, X; labels require INR monitoring.

    • Aspirin: Aspirin irreversibly inhibits COX-1 and needs no INR monitoring.
    • Clopidogrel: Clopidogrel blocks the P2Y12 receptor and needs no INR monitoring.
    • Enoxaparin: Enoxaparin is a low-molecular-weight heparin monitored by anti-Xa in special cases, not INR.

    Source: DailyMed — WARFARIN SODIUM TABLET label, 2 Dosage and Administration — INR monitoring; 12 Clinical Pharmacology · Read the note for this topic · Report a mistake (sple-cs-002)

  3. A 62-year-old man taking simvastatin 40 mg daily for hypercholesterolaemia is prescribed clarithromycin for a chest infection at an urgent-care clinic. Two days later the pharmacist checks his medicines for interactions before dispensing the antibiotic. What is the main interaction concern with this combination?

    • CYP3A4 induction lowering statin exposure
    • Renal excretion competition for simvastatin
    • Gastric pH elevation impairing absorption
    • CYP3A4 inhibition raising statin exposure
    Show answer

    CYP3A4 inhibition raising statin exposure. Clarithromycin is a strong CYP3A4 inhibitor; simvastatin labels contraindicate strong CYP3A4 inhibitors due to myopathy risk.

    • CYP3A4 induction lowering statin exposure: Incorrect: clarithromycin inhibits rather than induces CYP3A4.
    • Renal excretion competition for simvastatin: Incorrect: this combination is not a renal excretion competition interaction.
    • Gastric pH elevation impairing absorption: Incorrect: this combination is not a gastric pH absorption interaction.

    Source: DailyMed — SIMVASTATIN TABLET, FILM COATED label, 4 Contraindications — Strong CYP3A4 inhibitors · Read the note for this topic · Report a mistake (sple-cs-003)

  4. A 24-year-old woman develops lip swelling, wheeze and hypotension minutes after eating peanuts in a restaurant. A first-aider has an epinephrine auto-injector and asks the pharmacist by phone exactly how it should be given for anaphylaxis. Which route and site should be advised?

    • Subcutaneous into abdominal wall
    • Intramuscular into mid-outer thigh
    • Intramuscular into deltoid muscle
    • Intravenous bolus into arm vein
    Show answer

    Intramuscular into mid-outer thigh. Epinephrine injection labels direct IM administration into the anterolateral thigh for anaphylaxis.

    • Subcutaneous into abdominal wall: Subcutaneous abdominal injection is not the labelled first-line route and site.
    • Intramuscular into deltoid muscle: Intramuscular deltoid injection is not the labelled auto-injector site; the anterolateral thigh is specified.
    • Intravenous bolus into arm vein: Intravenous bolus is not the auto-injector route for anaphylaxis.

    Source: DailyMed — EPIPEN (EPINEPHRINE) INJECTION EPIPEN JR (EPINEPHRINE) INJECTION label, 2 Dosage and Administration — Intramuscular injection into the anterolateral thigh · Read the note for this topic · Report a mistake (sple-cs-004)

  5. A 74-year-old man taking dabigatran for atrial fibrillation arrives in the emergency department with a major gastrointestinal bleed. His last dose was six hours ago and urgent reversal of anticoagulation is needed before endoscopy. Which specific reversal agent should be given?

    • Protamine
    • Vitamin K
    • Idarucizumab
    • Naloxone
    Show answer

    Idarucizumab. Idarucizumab is the specific reversal agent for dabigatran per its label.

    • Protamine: Protamine reverses heparin.
    • Vitamin K: Vitamin K reverses warfarin effect.
    • Naloxone: Naloxone reverses opioids.

    Source: DailyMed — PRAXBIND (IDARUCIZUMAB) INJECTION label, 1 Indications and Usage — Reversal of dabigatran anticoagulation · Read the note for this topic · Report a mistake (sple-cs-005)

  6. A 45-year-old woman with rheumatoid arthritis takes weekly methotrexate and attends clinic with mouth ulcers and fatigue. Her blood count shows new pancytopenia. The rheumatologist suspects antifolate toxicity from her weekly treatment. Which enzyme does methotrexate inhibit to produce its therapeutic and toxic effects?

    • Dihydrofolate reductase
    • Xanthine oxidase
    • HMG-CoA reductase
    • Angiotensin-converting enzyme
    Show answer

    Dihydrofolate reductase. Methotrexate inhibits dihydrofolate reductase, blocking tetrahydrofolate and DNA synthesis.

    • Xanthine oxidase: Xanthine oxidase is inhibited by allopurinol.
    • HMG-CoA reductase: HMG-CoA reductase is inhibited by statins.
    • Angiotensin-converting enzyme: Angiotensin-converting enzyme is inhibited by ACE inhibitors.

    Source: DailyMed — METHOTREXATE INJECTION, SOLUTION label, 12 Clinical Pharmacology — Mechanism of Action (dihydrofolate reductase inhibition) · Read the note for this topic · Report a mistake (sple-cs-006)

  7. A 70-year-old man is prescribed levofloxacin for pneumonia at a community pharmacy. As he collects it, he mentions he plays tennis twice a week and asks what serious warnings he should know about tendon and nerve problems. Which drug class carries the boxed warning for these effects?

    • Macrolides
    • Tetracyclines
    • Sulfonamides
    • Fluoroquinolones
    Show answer

    Fluoroquinolones. Fluoroquinolone labels carry boxed warnings for tendinitis/tendon rupture and CNS effects.

    • Macrolides: Macrolide labels emphasise QT and interactions instead.
    • Tetracyclines: Tetracycline labels emphasise teeth/bone and photosensitivity.
    • Sulfonamides: Sulfonamide labels emphasise hypersensitivity/haematologic effects.

    Source: DailyMed — LEVOFLOXACIN TABLET, FILM COATED label, Boxed Warning — Tendinitis, Tendon Rupture, Peripheral Neuropathy and CNS Effects · Read the note for this topic · Report a mistake (sple-cs-007)

  8. A 52-year-old woman with hypothyroidism takes levothyroxine each morning. She has just been started on supplements for low bone density and anaemia, and her TSH has risen since she began taking everything together at breakfast. Which products must she separate from levothyroxine by at least four hours?

    • Folic acid and vitamin B12 tablets
    • Calcium carbonate and iron salts
    • Vitamin D and magnesium tablets
    • Zinc lozenges and vitamin C tablets
    Show answer

    Calcium carbonate and iron salts. Levothyroxine labels state iron and calcium supplements/antacids can decrease absorption; separate by 4 hours.

    • Folic acid and vitamin B12 tablets: Folic acid and vitamin B12 are not the labelled binding interaction with levothyroxine.
    • Vitamin D and magnesium tablets: Vitamin D and magnesium are not the labelled pair that must be separated by four hours.
    • Zinc lozenges and vitamin C tablets: Zinc lozenges and vitamin C are not the labelled binding interaction with levothyroxine.

    Source: DailyMed — LEVOTHYROXINE SODIUM TABLET label, 7 Drug Interactions — Iron and calcium products decrease levothyroxine absorption · Read the note for this topic · Report a mistake (sple-cs-008)

  9. A 59-year-old man started lisinopril for hypertension three months ago and now reports a persistent dry, tickly cough with no fever, sputum or wheeze. His chest examination and X-ray are normal. Which mediator accumulation best explains this cough?

    • Histamine
    • Serotonin
    • Bradykinin
    • Leukotrienes
    Show answer

    Bradykinin. Lisinopril labels describe cough likely due to increased bradykinin from ACE (kininase II) inhibition.

    • Histamine: Histamine accumulation does not explain ACE-inhibitor cough.
    • Serotonin: Serotonin accumulation does not explain ACE-inhibitor cough.
    • Leukotrienes: Leukotriene accumulation does not explain ACE-inhibitor cough.

    Source: DailyMed — ZESTORETIC (LISINOPRIL AND HYDROCHLOROTHIAZIDE) TABLET label, 6 Adverse Reactions — Cough; Clinical Pharmacology (bradykinin) · Read the note for this topic · Report a mistake (sple-cs-009)

  10. A 64-year-old woman with type 2 diabetes starts empagliflozin and returns to the pharmacy two weeks later with genital itching and light-headedness on standing. She asks whether these problems could be related to her new tablet. Which drug class explains both effects in its label warnings?

    • SGLT2 inhibitors
    • Sulfonylureas
    • Meglitinides
    • Glucosidase inhibitors
    Show answer

    SGLT2 inhibitors. SGLT2 inhibitor labels (e.g. empagliflozin) warn of genital mycotic infections and volume depletion/hypotension.

    • Sulfonylureas: Sulfonylurea labels emphasise hypoglycaemia/weight gain.
    • Meglitinides: Meglitinides emphasise hypoglycaemia.
    • Glucosidase inhibitors: AGIs emphasise gastrointestinal effects.

    Source: DailyMed — JARDIANCE (EMPAGLIFLOZIN) TABLET, FILM COATED label, 5 Warnings and Precautions — Genital Mycotic Infections and Volume Depletion · Read the note for this topic · Report a mistake (sple-cs-010)

  11. A 31-year-old man is brought to the emergency department with pinpoint pupils, slow breathing and reduced consciousness after using heroin. The team gives naloxone, an emergency injection that reverses his respiratory depression while supportive care is arranged. Toxicity from which drug class does naloxone reverse?

    • Benzodiazepines
    • Barbiturates
    • Anticholinergics
    • Opioid analgesics
    Show answer

    Opioid analgesics. Naloxone is an opioid antagonist labelled for opioid overdose reversal.

    • Benzodiazepines: Flumazenil is the benzodiazepine antagonist, used with cautions.
    • Barbiturates: No specific barbiturate reversal agent exists.
    • Anticholinergics: Physostigmine is used for anticholinergic toxicity in selected cases.

    Source: DailyMed — BUPRENORPHINE AND NALOXONE TABLET label, 1 Indications and Usage — Opioid overdose reversal · Read the note for this topic · Report a mistake (sple-cs-011)

  12. A 66-year-old man with angina uses sublingual glyceryl trinitrate for chest pain. He asks his pharmacist whether he can also take tablets he bought online for erectile dysfunction, and is told one option could cause severe hypotension with his nitrate. Which drug must he not combine with nitrates?

    • Atorvastatin
    • Sildenafil
    • Metoprolol
    • Furosemide
    Show answer

    Sildenafil. Sildenafil labels contraindicate concomitant nitrates in any form due to hypotension.

    • Atorvastatin: Statins have no nitrate contraindication.
    • Metoprolol: Beta-blocker and nitrate combinations are commonly used in angina.
    • Furosemide: Loop diuretic and nitrate combinations are commonly used in cardiac disease.

    Source: DailyMed — SILDENAFIL TABLET, FILM COATED label, 4 Contraindications — Concomitant organic nitrates · Read the note for this topic · Report a mistake (sple-cs-012)

  13. A 68-year-old woman of Han Chinese descent with chronic kidney disease is about to start allopurinol for gout in a nephrology clinic. Before the first dose, the team considers genetic screening because of the risk of severe skin reactions. Which screening does the allopurinol label advise considering for this patient before the first dose?

    • HLA-B*15:02 allele testing
    • HLA-B*27:05 allele testing
    • HLA-B*58:01 allele testing
    • HLA-DRB1 allele testing
    Show answer

    HLA-B*58:01 allele testing. Allopurinol labels advise considering HLA-B*58:01 screening in higher-risk ancestry groups before starting.

    • HLA-B*15:02 allele testing: HLA-B*15:02 screening is associated with carbamazepine risk, not the allopurinol label advice here.
    • HLA-B*27:05 allele testing: HLA-B*27:05 is associated with spondyloarthritis assessment, not allopurinol screening.
    • HLA-DRB1 allele testing: HLA-DRB1 testing is not the pharmacogenomic screening advised before allopurinol.

    Source: DailyMed — ALLOPURINOL TABLET label, 5 Warnings and Precautions — Severe cutaneous reactions; pharmacogenomic screening (HLA-B*58:01) · Read the note for this topic · Report a mistake (sple-cs-013)

  14. A 38-year-old man is dispensed an antibiotic for a dental abscess and tells the pharmacist he plans to attend a wedding this weekend where alcohol will be served. He must be counselled to avoid alcohol during treatment because of a disulfiram-like reaction. Which antibiotic requires this counselling?

    • Metronidazole
    • Amoxicillin
    • Azithromycin
    • Doxycycline
    Show answer

    Metronidazole. Metronidazole labelling has warned against alcohol during therapy due to disulfiram-like reactions.

    • Amoxicillin: Amoxicillin has no such alcohol warning.
    • Azithromycin: Azithromycin has no such warning.
    • Doxycycline: Doxycycline warnings centre on photosensitivity/oesophagitis.

    Source: DailyMed — METRONIDAZOLE TABLET label, 5 Warnings and Precautions — Alcohol interaction (disulfiram-like reaction) · Read the note for this topic · Report a mistake (sple-cs-014)

  15. A 57-year-old woman with type 2 diabetes uses insulin glargine at bedtime and asks the diabetes nurse whether she can draw it into the same syringe as her rapid-acting insulin to reduce injections. What does the glargine label advise?

    • Mix glargine with NPH insulin in one syringe
    • Shake glargine vial vigorously before each dose
    • Freeze glargine pens for long-term storage
    • Do not mix with other insulins in one syringe
    Show answer

    Do not mix with other insulins in one syringe. Glargine labels state do not dilute or mix with any other insulin or solution.

    • Mix glargine with NPH insulin in one syringe: Mixing glargine with NPH in one syringe is prohibited by the label.
    • Shake glargine vial vigorously before each dose: Glargine should not be shaken vigorously; follow label handling.
    • Freeze glargine pens for long-term storage: Insulin must not be frozen; frozen insulin is discarded.

    Source: DailyMed — INSULIN GLARGINE-ALDY INJECTION, SOLUTION label, 2 Dosage and Administration — Do not dilute or mix with other insulins · Read the note for this topic · Report a mistake (sple-cs-015)

  16. A 29-year-old man starting treatment for pulmonary tuberculosis phones his clinic worried that his urine and tears have turned orange-red and his soft contact lenses look stained. He otherwise feels well. Which of his tuberculosis medicines explains this effect?

    • Isoniazid
    • Rifampin
    • Pyrazinamide
    • Ethambutol
    Show answer

    Rifampin. Rifampin labels warn urine, sweat, tears may turn reddish-orange.

    • Isoniazid: INH counselling centres on hepatotoxicity/neuropathy.
    • Pyrazinamide: Pyrazinamide centres on hepatotoxicity/hyperuricaemia.
    • Ethambutol: Ethambutol centres on ocular toxicity.

    Source: DailyMed — RIFAMPIN CAPSULE label, 17 Patient Counseling Information — Discoloration of body fluids · Read the note for this topic · Report a mistake (sple-cs-016)

  17. A 46-year-old woman stable on lithium carbonate for bipolar disorder buys ibuprofen for back pain. A week later she develops tremor, nausea and unsteady gait, and her lithium level is high. What interaction most likely caused this rise in lithium levels?

    • Increased lithium clearance lowering serum levels
    • NSAID-induced hepatic metabolism of lithium
    • Reduced renal lithium clearance raising levels
    • Reduced lithium protein binding raising levels
    Show answer

    Reduced renal lithium clearance raising levels. NSAID labels/lithium labels warn NSAIDs can reduce renal lithium clearance and raise serum lithium.

    • Increased lithium clearance lowering serum levels: NSAIDs reduce rather than increase renal lithium clearance.
    • NSAID-induced hepatic metabolism of lithium: Lithium is renally cleared and is not hepatically metabolised.
    • Reduced lithium protein binding raising levels: Lithium is not significantly protein bound; the interaction is reduced renal clearance.

    Source: DailyMed — LITHIUM CARBONATE TABLET, EXTENDED RELEASE label, 7 Drug Interactions — NSAIDs decrease renal lithium clearance · Read the note for this topic · Report a mistake (sple-cs-017)

  18. A 22-year-old woman with severe nodular acne is considered for oral treatment in a dermatology clinic. Because the most effective option can cause major birth defects, it can only be supplied under a strict pregnancy-prevention programme with regular testing. Which drug is this?

    • Isotretinoin capsules
    • Tretinoin cream
    • Adapalene gel
    • Benzoyl peroxide gel
    Show answer

    Isotretinoin capsules. Isotretinoin is teratogenic with a restricted distribution/pregnancy-prevention programme (iPLEDGE).

    • Tretinoin cream: Topical tretinoin is not supplied under the oral isotretinoin pregnancy-prevention programme.
    • Adapalene gel: Adapalene gel is not supplied under the oral isotretinoin pregnancy-prevention programme.
    • Benzoyl peroxide gel: Benzoyl peroxide gel is not the teratogenic programme drug.

    Source: DailyMed — ZENATANE (ISOTRETINOIN) CAPSULE, GELATIN COATED label, Boxed Warning — Embryo-Fetal Toxicity; REMS pregnancy-prevention programme · Read the note for this topic · Report a mistake (sple-cs-018)

  19. An 80-year-old man taking digoxin and furosemide for heart failure presents with nausea, visual disturbance and palpitations. Blood tests show potassium 3.0 mmol/L and a raised digoxin level. Which electrolyte abnormality most likely potentiated his digoxin toxicity?

    • Hyperkalaemia
    • Hypermagnesaemia
    • Hypercalcaemia
    • Hypokalaemia
    Show answer

    Hypokalaemia. Digoxin labels warn hypokalaemia increases myocardial sensitivity to digoxin and toxicity risk.

    • Hyperkalaemia: Hyperkalaemia can be a sign in acute digoxin toxicity, not the potentiating abnormality shown here.
    • Hypermagnesaemia: Low magnesium can potentiate digoxin toxicity; raised magnesium is not the abnormality shown here.
    • Hypercalcaemia: Raised calcium can increase digoxin sensitivity, but the low potassium shown here is the potentiator.

    Source: DailyMed — DIGOXIN TABLET label, 5 Warnings and Precautions — Risk factors for digoxin toxicity (hypokalaemia) · Read the note for this topic · Report a mistake (sple-cs-019)

  20. A 63-year-old man takes his first dose of an alpha-blocker for hypertension at night and feels faint when he gets up to use the bathroom. His blood pressure drops markedly on standing, a classic first-dose effect with this type of drug. Which drug is responsible?

    • Amlodipine
    • Doxazosin
    • Losartan
    • Indapamide
    Show answer

    Doxazosin. Alpha-blocker labels (prazosin/doxazosin) warn of marked first-dose orthostatic hypotension/syncope.

    • Amlodipine: Calcium-channel blockers can cause oedema and headache, not the classic first-dose syncope warning.
    • Losartan: ARB warnings centre on fetal toxicity, acute kidney injury and hyperkalaemia.
    • Indapamide: Thiazide-like diuretic warnings centre on electrolyte disturbance.

    Source: DailyMed — PRAZOSIN HYDROCHLORIDE CAPSULE label, 5 Warnings and Precautions — First-dose postural hypotension and syncope · Read the note for this topic · Report a mistake (sple-cs-020)

  21. A 34-year-old woman with epilepsy stable on carbamazepine starts a combined oral contraceptive. Two months later she has an unplanned pregnancy, and her neurologist explains her seizure medicine lowered contraceptive hormone levels. By what mechanism did carbamazepine cause this failure?

    • CYP2D6 inhibition reducing hormone clearance
    • UGT inhibition reducing hormone clearance
    • CYP3A4 induction increasing hormone clearance
    • CYP1A2 inhibition reducing hormone clearance
    Show answer

    CYP3A4 induction increasing hormone clearance. Carbamazepine labels describe potent CYP3A4 induction and autoinduction, lowering many substrate levels.

    • CYP2D6 inhibition reducing hormone clearance: Carbamazepine induces rather than inhibits contraceptive hormone clearance through this route.
    • UGT inhibition reducing hormone clearance: UGT inhibition would raise rather than lower hormone levels and is not the labelled mechanism.
    • CYP1A2 inhibition reducing hormone clearance: CYP1A2 inhibition would raise rather than lower hormone levels.

    Source: DailyMed — CARBAMAZEPINE TABLET, FILM COATED, EXTENDED RELEASE label, 7 Drug Interactions; 12 Clinical Pharmacology — CYP3A4 enzyme induction · Read the note for this topic · Report a mistake (sple-cs-021)

  22. A 71-year-old woman taking metformin is booked for a CT scan with iodinated contrast. She also has an acute chest infection and worsening kidney function on recent blood tests. The radiology team asks pharmacy whether her diabetes medicine needs special handling. Which drug requires a contrast-related hold plan?

    • Metformin
    • Glipizide
    • Pioglitazone
    • Acarbose
    Show answer

    Metformin. Metformin labels give procedures for iodinated contrast and acute conditions risking renal dysfunction/lactic acidosis.

    • Glipizide: Sulfonylurea concern is hypoglycaemia.
    • Pioglitazone: Pioglitazone concerns fluid retention/bladder warnings.
    • Acarbose: Acarbose concerns GI effects.

    Source: DailyMed — METFORMIN HYDROCHLORIDE TABLET, FILM COATED label, 5 Warnings and Precautions — Lactic Acidosis; hold for iodinated contrast procedures · Read the note for this topic · Report a mistake (sple-cs-022)

  23. A 41-year-old man with treatment-resistant schizophrenia takes clozapine and attends for regular blood monitoring. His latest absolute neutrophil count has fallen dangerously low, so treatment is interrupted urgently. Which severe haematological risk is named in the clozapine boxed warning?

    • Tardive dyskinesia with long-term use
    • Neuroleptic malignant syndrome
    • QT prolongation with torsades risk
    • Severe neutropenia with agranulocytosis
    Show answer

    Severe neutropenia with agranulocytosis. Clozapine labels carry boxed warning for severe neutropenia with ANC monitoring requirements.

    • Tardive dyskinesia with long-term use: Tardive dyskinesia is a recognised antipsychotic risk but not the clozapine boxed ANC warning.
    • Neuroleptic malignant syndrome: Neuroleptic malignant syndrome is a recognised antipsychotic risk but not the boxed ANC warning.
    • QT prolongation with torsades risk: QT prolongation is not the defining clozapine boxed warning requiring ANC monitoring.

    Source: DailyMed — VERSACLOZ (CLOZAPINE) SUSPENSION label, Boxed Warning — Severe Neutropenia (Agranulocytosis); ANC monitoring · Read the note for this topic · Report a mistake (sple-cs-023)

  24. A 19-year-old woman with asthma uses a fluticasone inhaler twice daily and develops white patches in her mouth and a hoarse voice. Her technique is otherwise good and she uses a spacer. Which simple step after each dose reduces this problem?

    • Swallow extra water before each inhaled dose
    • Rinse mouth with water and spit after each dose
    • Use inhaler at bedtime instead of morning dose
    • Share inhaler with family if mouthpiece rinsed
    Show answer

    Rinse mouth with water and spit after each dose. Inhaled corticosteroid labels advise rinsing mouth after inhalation to reduce candidiasis/dysphonia.

    • Swallow extra water before each inhaled dose: Rinsing is done after the dose and the water is spat out, not swallowed beforehand.
    • Use inhaler at bedtime instead of morning dose: Timing remains as prescribed; bedtime substitution does not prevent oral candidiasis.
    • Share inhaler with family if mouthpiece rinsed: Inhalers must never be shared, even if the mouthpiece is rinsed.

    Source: DailyMed — FLOVENT HFA (FLUTICASONE PROPIONATE) AEROSOL, METERED label, 17 Patient Counseling Information — Rinse mouth after inhalation (oral candidiasis prevention) · Read the note for this topic · Report a mistake (sple-cs-024)

  25. A 69-year-old man taking warfarin has a stable INR and asks his pharmacist whether he must stop eating green vegetables completely. He enjoys spinach several times a week and does not want his anticoagulation to become unstable. What is the correct dietary advice?

    • Avoid all green vegetables for whole treatment
    • Double the warfarin dose after a spinach meal
    • Keep vitamin K intake consistent week to week
    • Stop warfarin whenever vitamin K foods are eaten
    Show answer

    Keep vitamin K intake consistent week to week. Warfarin labels advise consistent vitamin K intake; changes alter INR.

    • Avoid all green vegetables for whole treatment: Avoiding all vitamin K foods is not required; consistent intake is advised.
    • Double the warfarin dose after a spinach meal: The warfarin dose must never be self-adjusted for a single meal.
    • Stop warfarin whenever vitamin K foods are eaten: Warfarin must not be stopped for vitamin K foods; consistency and reporting changes matter.

    Source: DailyMed — WARFARIN SODIUM TABLET label, 7 Drug Interactions; 17 Patient Counseling Information — Consistent vitamin K intake · Read the note for this topic · Report a mistake (sple-cs-025)

  26. A 35-year-old woman taking isoniazid for tuberculosis reports dark urine, itching and yellowing of the eyes two months into treatment. Her liver enzymes are markedly raised, so the TB team stops treatment and monitors her liver function closely. Which drug caused this reaction?

    • Isoniazid
    • Cephalexin
    • Nitrofurantoin
    • Penicillin V
    Show answer

    Isoniazid. Isoniazid labels carry hepatotoxicity warning with monitoring and alcohol caution.

    • Cephalexin: Cephalexin lacks the defining tuberculosis hepatotoxicity monitoring warning.
    • Nitrofurantoin: Nitrofurantoin has chronic hepatic warnings, but isoniazid is the tuberculosis hepatotoxin in this regimen.
    • Penicillin V: Penicillin V lacks this hepatotoxicity warning.

    Source: DailyMed — ISONIAZID TABLET label, Boxed Warning — Severe and Fatal Hepatitis (hepatotoxicity) · Read the note for this topic · Report a mistake (sple-cs-026)

  27. A 58-year-old man receiving gentamicin for a severe infection develops reduced urine output and ringing in his ears. Blood tests show rising creatinine, and hearing testing is arranged urgently by the treating team. Which toxicities are the principal label warnings for this antibiotic?

    • Photosensitivity and oesophagitis
    • Hepatotoxicity and pancreatitis
    • Hypoglycaemia and lactic acidosis
    • Nephrotoxicity and ototoxicity
    Show answer

    Nephrotoxicity and ototoxicity. Gentamicin labels warn of nephrotoxicity and ototoxicity (vestibular/cochlear).

    • Photosensitivity and oesophagitis: Photosensitivity and oesophagitis are tetracycline counselling points, not gentamicin warnings.
    • Hepatotoxicity and pancreatitis: Hepatotoxicity and pancreatitis are not the principal gentamicin label warnings.
    • Hypoglycaemia and lactic acidosis: Hypoglycaemia and lactic acidosis are diabetes-drug counselling points, not gentamicin warnings.

    Source: DailyMed — GENTAMICIN SULFATE IN SODIUM CHLORIDE (GENTAMICIN SULFATE) INJECTION, SOLUTION label, Boxed Warning / 5 Warnings and Precautions — Nephrotoxicity and Ototoxicity · Read the note for this topic · Report a mistake (sple-cs-027)

  28. A 30-year-old woman taking a blood-pressure tablet tells her pharmacist she has just had a positive pregnancy test. She is in her second trimester and asks whether she can keep taking the same tablet, which acts on the renin-angiotensin system. Which drug must be stopped in pregnancy?

    • Folic acid
    • Lisinopril
    • Labetalol
    • Methyldopa
    Show answer

    Lisinopril. ACE inhibitor labels warn drugs acting on RAAS can cause fetal injury/death, especially 2nd/3rd trimester.

    • Folic acid: Folate is recommended in pregnancy, not stopped for fetal toxicity.
    • Labetalol: Labetalol is used for hypertension in pregnancy.
    • Methyldopa: Methyldopa is used for hypertension in pregnancy.

    Source: DailyMed — ZESTORETIC (LISINOPRIL AND HYDROCHLOROTHIAZIDE) TABLET label, Boxed Warning — Fetal Toxicity in pregnancy (drugs acting on the renin-angiotensin system) · Read the note for this topic · Report a mistake (sple-cs-028)

  29. A 60-year-old woman taking atorvastatin reports new unexplained muscle pain and weakness with fever and dark urine. She is advised to seek urgent care and have muscle and kidney blood tests checked the same day. Which serious statin complication is being excluded?

    • Tendon rupture
    • Nephrolithiasis
    • Rhabdomyolysis
    • Retinopathy
    Show answer

    Rhabdomyolysis. Statin labels advise reporting unexplained muscle symptoms due to myopathy/rhabdomyolysis risk.

    • Tendon rupture: Tendon rupture is a fluoroquinolone warning, not the statin emergency here.
    • Nephrolithiasis: Kidney stones are not the statin complication suggested by muscle pain with dark urine.
    • Retinopathy: Retinopathy is not the statin complication suggested by muscle pain with dark urine.

    Source: DailyMed — ATORVASTATIN CALCIUM TABLET, FILM COATED label, 5 Warnings and Precautions — Myopathy and Rhabdomyolysis · Read the note for this topic · Report a mistake (sple-cs-029)

  30. A 65-year-old man has a coronary stent and takes an antiplatelet drug to prevent stent thrombosis. Genetic testing shows he is a CYP2C19 poor metabolizer, and platelet-function testing shows little drug effect despite good adherence. Which antiplatelet drug shows this CYP2C19 prodrug problem?

    • Clopidogrel
    • Aspirin
    • Ticagrelor
    • Prasugrel
    Show answer

    Clopidogrel. Clopidogrel labels state it is a prodrug activated via CYP enzymes including CYP2C19; poor metabolisers have reduced effect.

    • Aspirin: Aspirin is directly active and does not need CYP2C19 prodrug activation.
    • Ticagrelor: Ticagrelor is directly active and is not a CYP2C19-activated prodrug.
    • Prasugrel: Prasugrel is also a prodrug, but the CYP2C19 poor-metaboliser boxed warning for diminished effect is clopidogrel.

    Source: DailyMed — CLOPIDOGREL BISULFATE TABLET label, Boxed Warning — Diminished antiplatelet effect in CYP2C19 poor metabolizers (prodrug activation) · Read the note for this topic · Report a mistake (sple-cs-030)

  31. A 67-year-old woman takes clopidogrel after a coronary stent and is also prescribed omeprazole for stomach protection. Her cardiologist asks pharmacy to review the combination because the stomach drug may weaken her antiplatelet protection. Which enzyme interaction explains this concern?

    • CYP3A4 induction
    • CYP2D6 inhibition
    • P-glycoprotein efflux
    • CYP2C19 inhibition
    Show answer

    CYP2C19 inhibition. Labels describe omeprazole as CYP2C19 inhibitor reducing clopidogrel active metabolite exposure.

    • CYP3A4 induction: CYP3A4 induction is not the omeprazole and clopidogrel interaction.
    • CYP2D6 inhibition: CYP2D6 inhibition is not the omeprazole and clopidogrel interaction.
    • P-glycoprotein efflux: P-glycoprotein efflux does not explain reduced clopidogrel active metabolite formation.

    Source: DailyMed — OMEPRAZOLE (OMEPRAZOLE MAGNESIUM) CAPSULE, DELAYED RELEASE label, 7 Drug Interactions — CYP2C19 inhibition reduces clopidogrel active metabolite · Read the note for this topic · Report a mistake (sple-cs-031)

  32. A 73-year-old woman with osteoporosis is prescribed a once-weekly tablet and asks how to take it safely. She usually has tea and toast as soon as she wakes up and then lies back down, which would be unsafe with this medicine. Which drug requires strict upright, empty-stomach administration?

    • Calcium carbonate
    • Alendronate
    • Cholecalciferol
    • Raloxifene
    Show answer

    Alendronate. Alendronate labels: take with plain water on waking, remain upright ≥30 min, nothing else by mouth, to avoid oesophageal injury.

    • Calcium carbonate: Calcium carbonate has no upright empty-stomach rule.
    • Cholecalciferol: Cholecalciferol has no upright empty-stomach rule.
    • Raloxifene: Raloxifene lacks the oesophageal upright administration rule.

    Source: DailyMed — ALENDRONATE (ALENDRONATE SODIUM TABLET) TABLET label, 2 Dosage and Administration — Take with plain water and remain upright for at least 30 minutes · Read the note for this topic · Report a mistake (sple-cs-032)

  33. A 49-year-old man with primary hypothyroidism has his levothyroxine dose increased after a high TSH result. He asks at his clinic review when the blood test should be repeated to judge whether the new dose is right. When should TSH be rechecked?

    • TSH rechecked the next day
    • TSH rechecked after one week
    • TSH rechecked after six weeks
    • TSH rechecked after six months
    Show answer

    TSH rechecked after six weeks. Levothyroxine labels/guidance: TSH assessed ~6 weeks after dose change due to long half-life/steady state.

    • TSH rechecked the next day: Next-day TSH cannot reflect the new steady state after a dose change.
    • TSH rechecked after one week: One week is too early to judge the new levothyroxine dose at steady state.
    • TSH rechecked after six months: Six months is too long to wait before judging a dose change.

    Source: DailyMed — LEVOTHYROXINE SODIUM TABLET label, 2 Dosage and Administration — TSH monitoring after initiation or dose change (steady state) · Read the note for this topic · Report a mistake (sple-cs-033)

  34. A 27-year-old woman who is 20 weeks pregnant is prescribed an antibiotic for an infection and asks the pharmacist to check it is safe for her baby. One option can permanently discolour developing teeth and affect bone growth. Which antibiotic must be avoided?

    • Doxycycline
    • Amoxicillin
    • Cefuroxime
    • Azithromycin
    Show answer

    Doxycycline. Tetracycline labels warn use in pregnancy can cause fetal harm, tooth discoloration and bone growth effects.

    • Amoxicillin: Beta-lactams are generally used in pregnancy when indicated and lack this warning.
    • Cefuroxime: Cephalosporins lack the tetracycline fetal teeth and bone warning.
    • Azithromycin: Macrolides lack the tetracycline fetal teeth and bone warning.

    Source: DailyMed — DOXYCYCLINE HYCLATE TABLET, FILM COATED DOXYCYCLINE HYCLATE CAPSULE DOXYCYCLINE POWDER, FOR SUSPENSION label, 8 Use in Specific Populations — Pregnancy (fetal bone and tooth effects) · Read the note for this topic · Report a mistake (sple-cs-034)

  35. A 55-year-old man with diabetes stores his in-use insulin pen in a freezer compartment by mistake while travelling. When he returns, he asks the pharmacist whether he can still use it once it has thawed out, and is told the storage error matters. Which storage condition is prohibited for in-use insulin?

    • Stored at room temperature
    • Protected from direct heat
    • Stored in a refrigerator
    • Stored in a freezer
    Show answer

    Stored in a freezer. Insulin labels state do not freeze; discard if frozen.

    • Stored at room temperature: In-use insulin may be kept at room temperature for the labelled in-use period.
    • Protected from direct heat: Protecting insulin from direct heat and light is correct practice.
    • Stored in a refrigerator: Unopened insulin is refrigerated per label; refrigeration is not the prohibited condition.

    Source: DailyMed — INSULIN GLARGINE-ALDY INJECTION, SOLUTION label, 16 How Supplied / Storage and Handling — Do not freeze insulin · Read the note for this topic · Report a mistake (sple-cs-035)

  36. A 42-year-old man taking tuberculosis treatment reports blurred vision and difficulty telling red from green. The TB clinic stops one drug and arranges urgent eye testing, including visual acuity and colour vision checks, because of dose-related ocular toxicity. Which drug caused this toxicity?

    • Rifampin
    • Ethambutol
    • Isoniazid
    • Streptomycin
    Show answer

    Ethambutol. Ethambutol labels require vision testing; optic neuritis can cause decreased acuity/red-green discrimination loss.

    • Rifampin: Rifampin counselling is orange fluids/interactions.
    • Isoniazid: INH is hepatic/neuropathy.
    • Streptomycin: Streptomycin is oto/nephrotoxicity.

    Source: DailyMed — ETHAMBUTOL HYDROCHLORIDE TABLET label, 4 Contraindications / 5 Warnings and Precautions — Optic neuritis and visual monitoring · Read the note for this topic · Report a mistake (sple-cs-036)

  37. A 50-year-old woman taking phenelzine for depression is given pethidine (meperidine) after surgery and develops agitation, fever, muscle rigidity and very high blood pressure. The anaesthetist recognises a dangerous interaction with her antidepressant. Which syndrome and combination caused this emergency?

    • Neuroleptic malignant syndrome
    • Anticholinergic toxicity syndrome
    • Serotonin syndrome
    • Opioid withdrawal syndrome
    Show answer

    Serotonin syndrome. MAOI labels contraindicate/warn against serotonergic opioids and sympathomimetics due to serotonin syndrome/hypertensive crisis.

    • Neuroleptic malignant syndrome: Neuroleptic malignant syndrome follows dopamine blockade, not this MAOI and serotonergic opioid combination.
    • Anticholinergic toxicity syndrome: Anticholinergic toxicity does not explain this MAOI interaction emergency.
    • Opioid withdrawal syndrome: Opioid withdrawal does not explain fever, rigidity and hypertension after pethidine with an MAOI.

    Source: DailyMed — PHENELZINE SULFATE TABLET, FILM COATED label, 4 Contraindications; 7 Drug Interactions — Serotonergic agents and serotonin syndrome · Read the note for this topic · Report a mistake (sple-cs-037)

  38. A 33-year-old man with diabetes starts isoniazid for tuberculosis and is given an extra vitamin tablet to protect his nerves. Without it, he was told he could develop tingling and numbness in his hands and feet. Which vitamin is used for this prophylaxis?

    • Pyridoxine
    • Cyanocobalamin
    • Ascorbic acid
    • Phytonadione
    Show answer

    Pyridoxine. INH labels recommend pyridoxine to prevent peripheral neuropathy, especially in at-risk patients.

    • Cyanocobalamin: Cyanocobalamin treats vitamin B12 deficiency, not isoniazid neuropathy prophylaxis.
    • Ascorbic acid: Ascorbic acid is vitamin C and is not isoniazid prophylaxis.
    • Phytonadione: Phytonadione is vitamin K and is used for coagulation, not neuropathy prophylaxis.

    Source: DailyMed — ISONIAZID TABLET label, 5 Warnings and Precautions — Peripheral neuropathy; pyridoxine prophylaxis · Read the note for this topic · Report a mistake (sple-cs-038)

  39. A 76-year-old woman taking furosemide for heart failure attends a medicines review with muscle cramps and dizziness. Her recent blood tests show low potassium and worsening kidney function, so her dose is reviewed. Which monitoring does the furosemide label require?

    • Blood glucose and HbA1c monitoring
    • Liver enzymes and bilirubin monitoring
    • INR and prothrombin time monitoring
    • Electrolytes and renal function monitoring
    Show answer

    Electrolytes and renal function monitoring. Loop diuretic labels warn of electrolyte/fluid depletion; monitor electrolytes, renal function and BP.

    • Blood glucose and HbA1c monitoring: Glucose can shift with diuretics but glucose monitoring alone misses fluid and electrolyte depletion.
    • Liver enzymes and bilirubin monitoring: Liver monitoring alone is not the furosemide label requirement here.
    • INR and prothrombin time monitoring: INR monitoring applies to warfarin, not furosemide monitoring here.

    Source: DailyMed — FUROSEMIDE TABLET label, 5 Warnings and Precautions — Fluid and electrolyte monitoring (potassium, renal function, blood pressure) · Read the note for this topic · Report a mistake (sple-cs-039)

  40. A 68-year-old man with heart failure with reduced ejection fraction attends a cardiology clinic for a medicines review. Two years earlier he developed lip and tongue swelling requiring emergency treatment while taking an ACE inhibitor. His cardiologist is reviewing which heart-failure medicines are safe for him after that reaction. Which drug is contraindicated for this patient?

    • Metolazone tablets
    • Sacubitril/valsartan tablets
    • Spironolactone tablets
    • Diltiazem tablets
    Show answer

    Sacubitril/valsartan tablets. Sacubitril/valsartan labels contraindicate concomitant ACE inhibitor (36-hour washout) and prior angioedema history.

    • Metolazone tablets: Metolazone is a thiazide-like diuretic without this angioedema contraindication.
    • Spironolactone tablets: Spironolactone concern is hyperkalaemia and renal function, not this angioedema contraindication.
    • Diltiazem tablets: Diltiazem concern is bradycardia and interactions, not this angioedema contraindication.

    Source: DailyMed — SACUBITRIL AND VALSARTAN TABLET, FILM COATED label, 4 Contraindications — History of angioedema; 36-hour ACE-inhibitor washout · Read the note for this topic · Report a mistake (sple-cs-040)