Effexor vs Paxil: side-by-side comparison
Effexor (Venlafaxine) and Paxil (Paroxetine) both belong to the Antidepressiva 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 | Effexor | Paxil |
|---|---|---|
| Active ingredient | Venlafaxine | Paroxetine |
| Manufacturer | Wyeth/Pfizer | GlaxoSmithKline |
| Class | Antidepressiva | Antidepressiva |
| Strengths | 37.5mg, 75mg, 150mg | 10mg, 20mg, 30mg, 40mg |
| Forms | capsule | tablet |
What's the same
Effexor and Paxil both belong to the Antidepressiva class and are used for partially overlapping indications. The active ingredients — Venlafaxine vs Paroxetine — share the same therapeutic approach, so many safety and management points carry across both.
Key differences
Meaningful differences are in active ingredient (Venlafaxine vs Paroxetine), strengths (37.5mg, 75mg, 150mg vs 10mg, 20mg, 30mg, 40mg), forms (capsule vs tablet), and the mechanism, half-life and side-effect nuances that distinguish members of the class.
Mechanism and action
Effexor: Effexor hemmt die Wiederaufnahme von Serotonin und Noradrenalin an der Synapse. Paxil: Paroxetin hemmt selektiv den Serotonin-Wiederaufnahmetransporter (SERT) und erhöht so die synaptische Serotoninverfügbarkeit.
When Effexor is preferred
Effexor XR ist zur Behandlung der Major Depression, der generalisierten Angststörung, der sozialen Phobie und der Panikstörung zugelassen.
When Paxil is preferred
Paxil ist je nach Region zur Behandlung der Major Depression, der generalisierten Angststörung, der sozialen Angststörung, der Panikstörung, der Zwangsstörung und der posttraumatischen Belastungsstörung zugelassen.
Häufig gestellte Fragen
Is Effexor or Paxil better? ▾
There is no single answer. Effexor and Paxil both belong to the Antidepressiva 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 Effexor to Paxil? ▾
Switching within the Antidepressiva 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 Effexor and Paxil have the same side effects? ▾
They share many of the Antidepressiva class side effects, with differences from mechanism and dose. Each medication's prescribing information lists specifics.
More Effexor comparisons
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