Choice A rationale:

Increased appetite is not a commonly associated side effect of antidepressant medications. In fact, some antidepressants can lead to decreased appetite or weight loss as side effects.

Choice B rationale:

Hypertension (high blood pressure) is generally not a common side effect of most antidepressant medications. However, there are specific cases where certain antidepressants might have an impact on blood pressure, but it's not a typical side effect across the board.

Choice C rationale:

This is the correct statement. Insomnia, or difficulty sleeping, is a commonly reported side effect of many antidepressant medications. It can disrupt sleep patterns and lead to increased sleep difficulties, which might exacerbate existing sleep problems or contribute to new ones.

Choice D rationale:

Excessive energy is not a common side effect associated with antidepressant use. Antidepressants typically work to regulate mood and alleviate symptoms of depression, and excessive energy would not align with the expected effects of these medications.