A nurse is teaching a client who has a new prescription for colchicine to treat gout. Which of the following instructions should the nurse include?

A. Increasing grapefruit juice intake is not recommended because grapefruit juice can interact with many medications, including colchicine, by inhibiting the CYP3A4 enzyme. This inhibition can increase colchicine levels in the blood, raising the risk of toxicity, which can manifest as severe gastrointestinal upset or, in rare cases, bone marrow suppression. Therefore, clients should avoid grapefruit juice while taking colchicine. B. Expecting increased bruising is incorrect because bruising is not a typical side effect of colchicine. While colchicine can rarely affect white blood cell counts or platelet function at high doses or with prolonged use, routine administration at standard doses does not commonly cause easy bruising. Teaching the client to anticipate bruising could cause unnecessary concern. C. This is the correct instruction. Colchicine frequently causes gastrointestinal side effects, including nausea, vomiting, abdominal pain, and diarrhea. Taking the medication with food can help minimize these symptoms by reducing irritation of the stomach lining. Educating the client about this strategy enhances adherence to therapy, as clients are more likely to continue the medication if side effects are manageable. Additionally, this instruction reinforces the importance of self-management in controlling gout flares effectively. D. Monitoring for muscle pain is not the primary concern with colchicine. Muscle pain is more commonly associated with other medications, such as statins or certain immunosuppressive drugs. While colchicine toxicity at high doses can cause muscle weakness, this is rare, and the primary teaching focus should be on managing gastrointestinal symptoms and recognizing signs of overdose, such as severe diarrhea or abdominal cramping.