Prozac^® is a medication that healthcare providers may prescribe to treat conditions such as depression, obsessive-compulsive disorder, panic disorder, and bulimia. The antidepressant, which works by blocking the reuptake of serotonin in the brain, is available in capsule and liquid form. Most people tolerate Prozac well, but certain side effects can occur, including insomnia, nausea, loss of appetite, and anxiety. There are many important precautions and warnings for Prozac; before starting this drug, be sure to tell your doctor about all of your current medications and existing medical conditions.