OTC Medications And Supplements - NAPLEX

1. Which OTC smoking cessation product provides 24-hour nicotine delivery and should be removed at night if vivid dreams occur?

   Nicotine transdermal patch. Provides steady nicotine release to manage withdrawal, but removal prevents sleep disturbances from excess.

2. Which OTC antiplatelet is used for secondary prevention of MI or ischemic stroke when appropriate?

   Aspirin (low-dose). Low-dose inhibits platelet aggregation, reducing risk of recurrent thrombotic events post-MI or stroke.

3. Which OTC antihistamine is least sedating and preferred for allergic rhinitis in most patients?

   Second-generation antihistamine (e.g., loratadine). Second-generation agents have minimal CNS penetration, reducing sedation while effectively blocking histamine.

4. Which OTC topical agent is first-line for mild inflammatory acne and may bleach fabrics?

   Benzoyl peroxide. It kills acne bacteria and reduces inflammation, though it oxidizes and bleaches materials on contact.

5. Which OTC agent is first-line for occasional heartburn and provides rapid symptom relief by neutralization?

   Antacid (e.g., calcium carbonate). Neutralizes stomach acid quickly, alleviating heartburn by raising gastric pH.

6. Which OTC antitussive is contraindicated with MAOIs or within 14 days due to serotonin syndrome risk?

   Dextromethorphan. It inhibits serotonin reuptake, risking syndrome when combined with MAOIs that increase serotonin levels.

7. Identify the key counseling limit for oxymetazoline nasal spray to prevent rebound congestion.

   Use no more than 3 days. Prolonged use causes rhinitis medicamentosa due to alpha-adrenergic rebound.

8. What is the maximum OTC treatment duration for a PPI for frequent heartburn without prescriber evaluation?

   14 days per course (no more often than every 4 months). OTC labeling limits to prevent masking serious conditions like GERD requiring medical evaluation.

9. Which OTC antihistamine is most sedating and commonly used for short-term insomnia?

   Diphenhydramine. As a first-generation antihistamine, it crosses the blood-brain barrier, causing significant CNS depression.

10. Which OTC expectorant is used to thin mucus and improve productive cough clearance?

    Guaifenesin. It increases water in mucus, facilitating expectoration without antitussive effects.

11. Which OTC intranasal agent is most effective monotherapy for persistent allergic rhinitis symptoms?

    Intranasal corticosteroid (e.g., fluticasone). They reduce nasal inflammation and symptoms more effectively than other classes for ongoing allergic rhinitis.

12. Which OTC analgesic is preferred for mild pain in pregnancy when used intermittently at the lowest effective dose?

    Acetaminophen. It has the best safety profile among analgesics for intermittent use during pregnancy, avoiding NSAID-related risks.

13. What is the minimum age for OTC ibuprofen use for fever/pain (without prescriber direction)?

    ≥ 6 months. Labeling ensures safety based on pediatric studies, allowing use from this age for appropriate indications.

14. Which OTC product is contraindicated in children and adolescents with viral illness due to Reye syndrome risk?

    Aspirin (salicylates). Salicylates can trigger fatty liver and encephalopathy in children with viral infections.

15. Which OTC topical antifungal is preferred for tinea pedis and requires continued use after symptom resolution?

    Terbinafine topical. It penetrates nails and skin, eradicating dermatophytes, with extended use ensuring complete clearance.

16. Which OTC NSAID should generally be avoided in patients with aspirin-exacerbated respiratory disease?

    Ibuprofen (and other nonselective NSAIDs). Nonselective NSAIDs cross-react with aspirin, triggering bronchospasm in sensitive patients.

17. Which OTC acid-suppressing class is best for prevention of meal-related heartburn when taken before food?

    H2-receptor antagonist (e.g., famotidine). H2RAs reduce acid production preemptively, preventing heartburn triggered by meals.

18. Which OTC osmotic laxative is commonly used for chronic constipation and has delayed onset?

    Polyethylene glycol 3350. As an osmotic agent, it draws water into the colon, softening stool with onset in 1-3 days.

19. What is the maximum recommended OTC acetaminophen total daily dose for adults from all sources?

    4,000 mg/day (prefer ≤ 3,000 mg/day when possible). FDA guidelines limit to prevent hepatotoxicity, with lower preferred to minimize risk in vulnerable populations.

20. What is the key boxed warning risk for NSAIDs such as ibuprofen and naproxen?

    Increased risk of CV thrombotic events and GI bleeding/ulcer. NSAIDs inhibit prostaglandins, increasing cardiovascular events and gastrointestinal mucosal damage.

21. Which OTC antidiarrheal should be avoided in suspected invasive bacterial diarrhea (fever or bloody stools)?

    Loperamide. It slows motility, potentially prolonging infection in invasive cases like those with fever or blood.

22. Which OTC PPI is indicated for frequent heartburn and should be taken before breakfast for best effect?

    Omeprazole (OTC) or esomeprazole (OTC). PPIs inhibit the proton pump irreversibly, with optimal efficacy when taken before the morning meal activates pumps.

23. Which supplement is associated with increased bleeding risk and should be held before surgery when possible?

    Ginkgo biloba. Inhibits platelet aggregation, heightening bleeding risk especially perioperatively.

24. Which OTC oral decongestant can worsen hypertension and should be avoided in uncontrolled HTN?

    Pseudoephedrine. As a sympathomimetic, it causes vasoconstriction that can elevate blood pressure in hypertensive patients.

25. Which herbal supplement significantly induces CYP3A4 and P-gp, reducing efficacy of many drugs (e.g., OCs)?

    St. John's wort. Induces enzymes and transporters, accelerating metabolism of substrates like oral contraceptives.

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