Prozac vs Celexa: side-by-side comparison
Prozac (Fluoxetine) and Celexa (Citalopram) both belong to the Anti-Depressants class. They share clinical context but use different active ingredients. The choice between them depends on mechanism nuances, side-effect profile and individual response.
| Property | Prozac | Celexa |
|---|---|---|
| Active ingredient | Fluoxetine | Citalopram |
| Manufacturer | Eli Lilly | Forest Laboratories / AbbVie |
| Class | Anti-Depressants | Anti-Depressants |
| Strengths | 10mg, 20mg, 40mg | 10mg, 20mg, 40mg |
| Forms | capsule, tablet | tablet |
What's the same
Prozac and Celexa both belong to the Anti-Depressants class and are used for partially overlapping indications. The active ingredients — Fluoxetine vs Citalopram — share the same therapeutic approach, so many safety and management points carry across both.
Key differences
Meaningful differences are in active ingredient (Fluoxetine vs Citalopram), strengths (10mg, 20mg, 40mg vs 10mg, 20mg, 40mg), forms (capsule, tablet vs tablet), and the mechanism, half-life and side-effect nuances that distinguish members of the class.
Mechanism and action
Prozac: Fluoxetine selectively inhibits the serotonin reuptake transporter, increasing synaptic serotonin availability. Celexa: Citalopram selectively inhibits the serotonin reuptake transporter, increasing synaptic serotonin availability with limited affinity for noradrenaline transporters or other receptors.
When Prozac is preferred
Prozac is approved for major depressive disorder (adult and paediatric from age 8), obsessive-compulsive disorder (paediatric from age 7), bulimia nervosa, panic disorder and premenstrual dysphoric disorder.
When Celexa is preferred
Celexa is approved for major depressive disorder.
Frequently asked questions
Is Prozac or Celexa better? ▾
There is no single answer. Prozac and Celexa both belong to the Anti-Depressants class but differ in mechanism nuances, half-life and side-effect profile. Preference depends on the patient, the prescriber and prior response to other therapies.
Can I switch from Prozac to Celexa? ▾
Switching within the Anti-Depressants class is done under supervision, typically using equivalent doses and a follow-up period to confirm response and tolerance. It is not a self-directed decision.
Do Prozac and Celexa have the same side effects? ▾
They share many of the Anti-Depressants class side effects, with differences from mechanism and dose. Each medication's prescribing information lists specifics.
More Prozac comparisons
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.