Which of the following is a symptom of digoxin toxicity?

Nausea is indeed a well-recognized symptom of digoxin toxicity. Digoxin is a medication used primarily to treat heart conditions, and its narrow therapeutic index means that the difference between therapeutic and toxic doses is small. When toxicity occurs, various gastrointestinal symptoms manifest, of which nausea is prominent. Patients may also experience other symptoms such as vomiting, diarrhea, or even visual disturbances as part of the toxicity profile.

In contrast, weight gain can be influenced by a range of factors and is not directly indicative of digoxin toxicity. Headaches can occur for many reasons but are not specifically associated with digoxin toxicity. Increased appetite is also not a symptom of toxicity; rather, it is contrary to what many patients might experience if they are feeling unwell due to toxicity effects. Understanding these symptoms is crucial for monitoring patients on digoxin therapy effectively.