Antidepressants are associated with a variety of adverse drug effects.

Short Term

Short-term effects can include symptoms such as nausea, with long-term effects including weight gain, weight loss or cognitive effects.

Short to Long Term

Other short- or long-term drug effects include sexual dysfunction, insomnia, sedation, anxiety, falls, fatigue, gastric bleeding, hyponatraemia and QTc prolongation.82 

Weight Changes

People may experience weight changes during antidepressant treatment. Weight gain may be associated with depression recovery and improved appetite on one hand and undesirable antidepressant effects on the other;83 however, many placebo controlled studies report no weight data making it difficult to accurately estimate weight changes.82 SSRIs have been seen as weight neutral, or in some cases associated with weight loss in the short-term (≤8wk studies) and weight gain in the long-term.83,49,84,85