Fluoxetine is a selective serotonin reuptake inhibitor (SSRI) antidepressant. It works by increasing the levels of serotonin, a chemical messenger in the brain. This improves mood and physical symptoms of depression and also relieves symptoms of panic and obsessive disorders.

Common side effects of Fluoxetine
Depression, Erectile dysfunction, Indigestion, Influenza like syndrome, Insomnia (difficulty in sleeping), Loss of appetite, Low sexual desire, Nasal congestion (stuffy nose), Nausea, Rash, Sore throat, Sweating, Tremor, Weakness, Weight loss, Yawning