Prozac vs Effexor: side-by-side comparison
Prozac (Fluoxetine) and Effexor (Venlafaxine) both belong to the Antidépresseurs 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 | Effexor |
|---|---|---|
| Active ingredient | Fluoxetine | Venlafaxine |
| Manufacturer | Eli Lilly | Wyeth/Pfizer |
| Class | Antidépresseurs | Antidépresseurs |
| Strengths | 10mg, 20mg, 40mg | 37.5mg, 75mg, 150mg |
| Forms | capsule, tablet | capsule |
What's the same
Prozac and Effexor both belong to the Antidépresseurs class and are used for partially overlapping indications. The active ingredients — Fluoxetine vs Venlafaxine — share the same therapeutic approach, so many safety and management points carry across both.
Key differences
Meaningful differences are in active ingredient (Fluoxetine vs Venlafaxine), strengths (10mg, 20mg, 40mg vs 37.5mg, 75mg, 150mg), forms (capsule, tablet vs capsule), and the mechanism, half-life and side-effect nuances that distinguish members of the class.
Mechanism and action
Prozac: La fluoxétine inhibe sélectivement le transporteur de recapture de la sérotonine, augmentant sa disponibilité synaptique. Effexor: Effexor inhibe la recapture synaptique de la sérotonine et de la noradrénaline.
When Prozac is preferred
Prozac est autorisé dans la dépression caractérisée (adulte et enfant à partir de 8 ans), le trouble obsessionnel compulsif (enfant à partir de 7 ans), la boulimie nerveuse, le trouble panique et le trouble dysphorique prémenstruel.
When Effexor is preferred
Effexor LP est autorisé dans la dépression caractérisée, le trouble anxieux généralisé, l'anxiété sociale et le trouble panique.
Questions fréquentes
Is Prozac or Effexor better? ▾
There is no single answer. Prozac and Effexor both belong to the Antidépresseurs 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 Effexor? ▾
Switching within the Antidépresseurs 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 Effexor have the same side effects? ▾
They share many of the Antidépresseurs class side effects, with differences from mechanism and dose. Each medication's prescribing information lists specifics.
More Prozac comparisons
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