Correct Answer: B

Rationale: Repaglinide causes a rapid, short-lived release of insulin. It is crucial for the client to take this medication 15-30 minutes before each meal to synchronize the peak insulin availability with mealtime glucose elevation, maximizing its effectiveness in controlling blood sugar levels.

Correct Answer: B

Rationale: Acetylcysteine contains sulfur, which gives it a characteristic rotten-egg odor. This smell is normal and expected when using this medication.

Correct Answer: A

Rationale: The correct answer is to instruct the client to brush and floss their teeth regularly. Phenytoin can lead to gingival hyperplasia, making oral hygiene crucial to prevent complications. Encouraging good oral care practices helps reduce the risk of adverse effects on the gums and teeth.

Correct Answer: C

Rationale: The correct answer is C, Warfarin. Aspirin increases the effect of anticoagulants like warfarin by inhibiting platelet aggregation, leading to an increased risk of bleeding. Therefore, the use of aspirin is generally contraindicated for clients taking warfarin.

Correct Answer: B

Rationale: Ciprofloxacin should not be taken with dairy products because calcium can interfere with the absorption of the medication. The client should be instructed to take it 1 hour before or 2 hours after consuming dairy products to ensure optimal effectiveness of the medication.