What does fluoxetine mean?
Fluoxetine is a prescription antidepressant belonging to the class of drugs known as selective serotonin reuptake inhibitors, or SSRIs. First approved in the United States in 1987 under the brand name Prozac, it works by increasing the amount of serotonin available in the brain, which can ease symptoms of major depressive disorder, obsessive-compulsive disorder, bulimia nervosa, and panic disorder. The word itself is almost exclusively technical: doctors, pharmacists, and patients use it when discussing prescriptions and treatment plans, while general conversation more often reaches for the famous brand name. Typically taken as a daily capsule, fluoxetine became one of the most widely prescribed psychiatric medicines in history and helped bring depression into mainstream public discussion. Its cultural footprint extends beyond medicine — it has featured prominently in literature, film, and debates about whether medication changes personality rather than merely treating illness. As a vocabulary item, it signals familiarity with modern healthcare language.
nounA prescription antidepressant of the selective serotonin reuptake inhibitor (SSRI) class, used to treat depression, obsessive-compulsive disorder, bulimia nervosa, and panic disorder. It is best known under the brand name Prozac.
- The pharmaceutical compound fluoxetine hydrochloride, an SSRI antidepressant.
- (By extension, in casual usage) a generic reference to any modern antidepressant medication.
"Her doctor prescribed fluoxetine after several months of persistent low mood."
"Clinical trials showed that fluoxetine significantly reduced symptoms of major depressive disorder."
"He'd been on fluoxetine for six weeks before he noticed the fog beginning to lift."
As a chemical substance, fluoxetine is treated as a mass noun and rarely pluralized; any counting occurs at the level of tablets or milligram doses.
"The dispensary stocked several strengths of fluoxetine capsules."
Fluoxetine hit the market in 1987 as Prozac and became the first blockbuster psychiatric drug so culturally pervasive that it inspired a bestselling book and endless debates about cosmetic pharmacology.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Words that share this root
How fluoxetine is actually used
Fluoxetine is a technical, clinical term used mainly by healthcare professionals, patients discussing prescriptions, and journalists writing about mental health; it carries no inherent connotation beyond medical neutrality. In everyday speech many people use the brand name Prozac instead. The drug is almost always discussed as a mass noun ('fluoxetine', never 'two fluoxetines'), though it may be counted in dosage units such as '20 mg tablets'.
Easily confused with fluoxetine
Fluvoxamine is a different SSRI antidepressant used mainly for OCD, whereas fluoxetine is the drug better known as Prozac.