Valtrex vs Viagra Professional: side-by-side comparison
Valtrex (Antiviraux) and Viagra Professional (Dysfonction érectile) belong to different therapeutic classes and are rarely interchangeable. This page compares the medications' purposes, mechanisms and the situations where each is used.
| Property | Valtrex | Viagra Professional |
|---|---|---|
| Active ingredient | Valacyclovir | Sildenafil Citrate |
| Manufacturer | GlaxoSmithKline | Pfizer |
| Class | Antiviraux | Dysfonction érectile |
| Strengths | 500mg, 1000mg | 100mg |
| Forms | tablet | sublingual tablet |
What's the same
Valtrex and Viagra Professional are used in very different patients, and the points in common are limited. The main shared element is that both meet regulatory standards for efficacy and safety and benefit from pharmacist oversight.
Key differences
Valtrex belongs to Antiviraux while Viagra Professional belongs to Dysfonction érectile. Indications, mechanisms and target populations differ. The comparison is most useful when a clinician has mentioned both medications and the patient wants to understand where each fits.
Mechanism and action
Valtrex: Le valaciclovir est rapidement et presque complètement converti en aciclovir lors du premier passage intestinal et hépatique, par la valaciclovir hydrolase. Viagra Professional: Le citrate de sildénafil inhibe la PDE5, ce qui permet au GMP cyclique produit lors de l'excitation sexuelle de s'accumuler dans le tissu pénien, relâchant le muscle lisse des artères péniennes et augmentant l'afflux san…
When Valtrex is preferred
Valtrex est autorisé chez l'adulte dans le traitement des infections à herpès simplex, dont l'herpès génital (épisodes initiaux, épisodes récurrents et traitement suppressif), l'herpès labial (schéma court à forte dose sur une journée), la réduction de la transmission chez l'adul…
When Viagra Professional is preferred
Viagra Professional s'adresse à l'homme adulte présentant une dysfonction érectile.
Questions fréquentes
Is Valtrex or Viagra Professional better? ▾
Valtrex and Viagra Professional are not interchangeable — they treat different conditions. Asking which is "better" is meaningful only when a clinician has weighed both for the same specific clinical scenario.
Can I switch from Valtrex to Viagra Professional? ▾
Switching between Valtrex and Viagra Professional is rarely an appropriate decision since they belong to different classes and treat different conditions. The real question is usually whether the diagnosis calls for one medication or the other — which the prescriber resolves.
Do Valtrex and Viagra Professional have the same side effects? ▾
No — they belong to different classes and have distinct side-effect profiles. Each medication has its own prescribing information.
More Valtrex comparisons
Les informations publiées sur ce site sont fournies à titre documentaire et pédagogique. Elles ne remplacent pas l'avis d'un professionnel de santé qualifié.