PROZAC is one of the world's most widely prescribed antidepressants; it has been prescribed for more than 40 million people worldwide. Chances are, someone you know is getting better because of it.

PROZAC was the first of a new class of drugs, called selective serotonin reuptake inhibitors (SSRIs), to be approved for use in the United States. This new type of medication helps patients with depression by increasing the availability of serotonin in the brain. Scientists believe serotonin affects many types of activity in the brain, including the regulation of mood.