Prozac vs Lexapro: side-by-side comparison
Prozac (Fluoxetine) and Lexapro (Escitalopram) 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 | Lexapro |
|---|---|---|
| Active ingredient | Fluoxetine | Escitalopram |
| Manufacturer | Eli Lilly | Forest/Allergan |
| Class | Anti-Depressants | Anti-Depressants |
| Strengths | 10mg, 20mg, 40mg | 5mg, 10mg, 20mg |
| Forms | capsule, tablet | tablet |
What's the same
Prozac and Lexapro both belong to the Anti-Depressants class and are used for partially overlapping indications. The active ingredients — Fluoxetine vs Escitalopram — share the same therapeutic approach, so many safety and management points carry across both.
Key differences
Meaningful differences are in active ingredient (Fluoxetine vs Escitalopram), strengths (10mg, 20mg, 40mg vs 5mg, 10mg, 20mg), 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. Lexapro: Lexapro acts by selectively inhibiting the serotonin reuptake transporter (SERT) at the synapse, increasing serotonin availability for postsynaptic 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 Lexapro is preferred
Lexapro is approved for major depressive disorder and generalised anxiety disorder in adults and adolescents 12 years and older (depression) and adults (generalised anxiety).
Frequently asked questions
Is Prozac or Lexapro better? ▾
There is no single answer. Prozac and Lexapro 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 Lexapro? ▾
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 Lexapro 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.