A nurse is providing teaching to a client who is taking tetracycline to treat acne. Which of the following instructions should the nurse include?

Rationale: A. "Take the medication with an antacid if gastrointestinal upset occurs.": Antacids can bind to tetracycline and significantly reduce its absorption, making the antibiotic less effective. Clients should be instructed to avoid taking tetracycline simultaneously with antacids. B. "Use a hormonal contraceptive when sexually active.": Tetracycline can decrease the effectiveness of hormonal contraceptives, so clients should use an additional form of contraception rather than relying solely on hormonal methods. This statement should emphasize using a backup method rather than suggesting hormonal contraceptives alone. C. "Avoid taking this medication with milk.": Calcium-containing products, including milk, can bind to tetracycline and impair absorption. Clients should take the medication with water and separate it from dairy products by at least 2 hours to ensure effectiveness. D. "Exposure to direct sunlight can help this medication improve acne.": Tetracycline increases photosensitivity, making clients more prone to sunburn. Clients should avoid direct sunlight and use protective measures such as sunscreen, hats, and protective clothing, rather than seeking sun exposure.