Hi Guys,My self lucy santi and I am health expert. Antidepressants are medicines that treat depression.Antidepressants may cause mild side effects that usually do not last long. These may include headache, nausea, sleep problems, restlessness, and sexual problems.Conflicting results have arisen from studies analyzing the efficacy of antidepressants by comparisons to placebo in people with acute mild to moderate depression.