A nurse is planning to provide teaching to a client who has a new prescription for disulfiram. Which of the following statements should the nurse include in the teaching?

Choice A reason: Mouthwash often contains alcohol, which can trigger a severe disulfiram reaction. Advising its use is unsafe. Clients should avoid alcohol-containing products such as mouthwash, cough syrups, and certain foods. Choice B reason: Cologne and antiperspirants may contain alcohol, and substituting one for the other does not eliminate risk. This advice is misleading and unsafe. Choice C reason: Carrying an identification card is correct because it alerts healthcare providers and others that the client is taking disulfiram. This is important in emergencies to prevent accidental alcohol administration and to explain potential reactions. Choice D reason: Alcohol consumption should not be limited—it must be completely avoided. Even small amounts can cause severe reactions including hypotension, tachycardia, nausea, and potentially life-threatening complications.