Which symptom may indicate an adverse reaction to a new medication?

Sudden weight loss is a significant symptom that may indicate an adverse reaction to a new medication. Many medications can affect metabolism, appetite, or hormone levels, leading to unintended weight changes. Rapid or unexpected weight loss can signal that the body is having a negative response to the medication, potentially indicating issues such as malnutrition, an adverse effect on appetite, or other metabolic disturbances. Monitoring weight during a new medication regimen is crucial, as it can help identify potential side effects early on, allowing for timely intervention by healthcare providers.

In contrast, increased appetite, improved sleep quality, and enhanced energy levels might be considered positive responses to medication, suggesting that the medication may be working as intended rather than indicating an adverse reaction.