Nokea
Generic drugs may differ from brand-name drugs in:
- A. Active ingredient
- B. Inactive ingredients
- C. Therapeutic effect
- D. All of the above
Correct Answer: B
Rationale: Choice B is correct because generics may use different inactive ingredients (e.g., fillers, dyes) affecting appearance or tolerability, but not efficacy, per FDA rules. Choice A is incorrect as active ingredients must be identical. Choice C is wrong because therapeutic effects are equivalent. Choice D is incorrect since only inactive ingredients differ.
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Herbal products that may increase INR include:
- A. Ginkgo biloba
- B. St John's wort
- C. Valerian root
- D. All of the above
Correct Answer: A
Rationale: Choice A is correct because ginkgo biloba can increase INR by enhancing warfarin's effect through antiplatelet activity, risking bleeding. Choice B is incorrect as St John's wort induces CYP2C9, decreasing INR and warfarin efficacy. Choice C is wrong because valerian root doesn't significantly alter INR. Choice D is incorrect since only ginkgo biloba increases INR.
Over-the-counter drugs that should be avoided in patients with hypertension include:
- A. Acetaminophen
- B. Pseudoephedrine
- C. Ibuprofen
- D. All of the above
Correct Answer: B
Rationale: Choice B is correct because pseudoephedrine, a decongestant, raises blood pressure via vasoconstriction, risky in hypertension, per guidelines. Choice A is incorrect as acetaminophen doesn't affect BP. Choice C is wrong because ibuprofen's BP effect is milder and not absolute avoidance. Choice D is incorrect since only pseudoephedrine is key.
The elderly are at high risk of ADRs due to:
- A. Having greater muscle mass than younger adults, leading to higher volume of distribution
- B. The extensive studies that have been conducted on drug safety in this age group
- C. The blood-brain barrier being less permeable, requiring higher doses to achieve therapeutic effect
- D. Age-related decrease in renal function
Correct Answer: D
Rationale: Choice D is correct because an age-related decline in renal function slows drug excretion, increasing ADR risk as drugs accumulate. Choice A is incorrect as muscle mass decreases with age, not increases. Choice B is wrong because studies are often limited in the elderly, not extensive. Choice C is incorrect since the blood-brain barrier's permeability doesn't typically lessen, and higher doses aren't standard.
Off-label use of drugs is:
- A. Illegal
- B. Regulated by the FDA
- C. Permitted with scientific evidence
- D. All of the above
Correct Answer: C
Rationale: Choice C is correct because off-label use is legal and common, permitted with scientific backing or clinical judgment, not FDA-regulated post-approval. Choice A is incorrect as it's not illegal. Choice B is wrong because FDA doesn't regulate off-label practice. Choice D is incorrect since only C applies.
Women who are prescribed drugs that are known teratogens should:
- A. Use effective contraception
- B. Avoid breastfeeding
- C. Increase their vitamin intake
- D. All of the above
Correct Answer: A
Rationale: Choice A is correct because teratogenic drugs can harm a fetus, so effective contraception is essential to prevent pregnancy during treatment, per safety guidelines. Choice B is incorrect as breastfeeding avoidance applies post-delivery, not during prescribing. Choice C is wrong because increasing vitamins doesn't mitigate teratogenic risk. Choice D is incorrect since only contraception directly addresses the primary risk.