Allegra vs Viagra Super Active: side-by-side comparison
Allegra (Allergy and Antihistamines) and Viagra Super Active (Erectile Dysfunction (ED)) belong to different therapeutic classes and are rarely interchangeable. This page compares the medications' purposes, mechanisms and the situations where each is used.
| Property | Allegra | Viagra Super Active |
|---|---|---|
| Active ingredient | Fexofenadine | Sildenafil Citrate |
| Manufacturer | Sanofi | Pfizer |
| Class | Allergy and Antihistamines | Erectile Dysfunction (ED) |
| Strengths | 30mg, 60mg, 120mg, 180mg | 100mg |
| Forms | tablet, oral suspension, orodispersible tablet | soft gelatin capsule |
What's the same
Allegra and Viagra Super Active 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
Allegra belongs to Allergy and Antihistamines while Viagra Super Active belongs to Erectile Dysfunction (ED). 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
Allegra: Fexofenadine selectively blocks peripheral H1 histamine receptors, antagonising the effects of histamine on vasodilation, capillary permeability, sensory nerve endings and smooth muscle. Viagra Super Active: The active sildenafil citrate inhibits PDE5 in penile tissue during sexual arousal, allowing cyclic GMP to accumulate, smooth muscle to relax and blood inflow to increase.
When Allegra is preferred
Allegra is approved in adults and children for the treatment of seasonal allergic rhinitis and chronic idiopathic urticaria.
When Viagra Super Active is preferred
Viagra Super Active is intended for adult men with erectile dysfunction.
Frequently asked questions
Is Allegra or Viagra Super Active better? ▾
Allegra and Viagra Super Active 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 Allegra to Viagra Super Active? ▾
Switching between Allegra and Viagra Super Active 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 Allegra and Viagra Super Active 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 Allegra comparisons
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.