Which one of the following drugs cause weight gain as a side effect?
a. antacids
b. ibuprofen
c. antidepressants
d. antihistamines

Antidepressants are drugs that may cause weight gain as a side effect. Correct C

There are several possibilities why: Some antidepressants may trigger food cravings, particularly for carbohydrates, they may also affect metabolism...

The depression itself leads to weight gain. Overeating can also be a symptom of depression that can cause weight gain regardless of taking antidepressants.

answer: i would say the brain but it seem that you have a brain.