Discovered in 1972, Fluoxetine is an antidepressant that is used for the treatment of major depressive disorder, obsessive–compulsive disorder (OCD), bulimia nervosa, panic disorder, and premenstrual dysphoric disorder. It may also decrease the risk of suicide in those over the age of 65. Basically, Fluoxetine works by increasing the amount of serotonin (a natural substance) in your brain – A process that will help maintain mental health balance. As for the common side effects of this medication, they include indigestion, trouble sleeping, sexual dysfunction, loss of appetite, dry mouth, rash, and abnormal dreams. Fluoxetine also has other side effects, albeit more serious, such as mania, seizures, an increased risk of suicidal behavior in people under 25 years old, and an increased risk of bleeding. If stopped suddenly, a withdrawal syndrome may occur with anxiety, dizziness, and changes in sensation. Plus, it is unclear if Fluoxetine is safe in pregnancy. However, if you are already on this medication, it may be reasonable to continue using it during breastfeeding. Bear in mind that Fluoxetine can be taken with food or on an empty stomach. However, it is best to give this medicine in the morning.