Stendra vs Zithromax: side-by-side comparison
Stendra (Erectile Dysfunction (ED)) and Zithromax (Antibiotics) belong to different therapeutic classes and are rarely interchangeable. This page compares the medications' purposes, mechanisms and the situations where each is used.
| Property | Stendra | Zithromax |
|---|---|---|
| Active ingredient | Avanafil | Azithromycin |
| Manufacturer | Metuchen Pharmaceuticals | Pfizer |
| Class | Erectile Dysfunction (ED) | Antibiotics |
| Strengths | 50mg, 100mg, 200mg | 250mg, 500mg, 600mg |
| Forms | tablet | tablet, oral suspension, extended-release suspension |
What's the same
Stendra and Zithromax 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
Stendra belongs to Erectile Dysfunction (ED) while Zithromax belongs to Antibiotics. 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
Stendra: Avanafil selectively inhibits phosphodiesterase type 5 (PDE5) in the corpus cavernosum, increasing cGMP and enhancing nitric-oxide-mediated vasodilation in response to sexual stimulation. Zithromax: Azithromycin binds to the 50S ribosomal subunit of bacteria, inhibiting protein synthesis.
When Stendra is preferred
Stendra is approved for erectile dysfunction in adult men.
When Zithromax is preferred
Zithromax is approved in adults and children for the treatment of community-acquired pneumonia, acute exacerbations of chronic bronchitis, sinusitis, pharyngitis caused by Streptococcus pyogenes, otitis media, urethritis and cervicitis caused by Chlamydia trachomatis or Neisseria…
Frequently asked questions
Is Stendra or Zithromax better? ▾
Stendra and Zithromax 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 Stendra to Zithromax? ▾
Switching between Stendra and Zithromax 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 Stendra and Zithromax 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 Stendra comparisons
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.