Quick Summary
All three PDE5 inhibitors are effective for erectile dysfunction, but differ in duration, flexibility, and patient response.
Sildenafil (Viagra)
Best for short-term use and predictable timing.
Duration: 4–6 hours
Onset: 30–60 minutes
Tadalafil (Cialis)
Best for long duration and spontaneity.
Duration: up to 36 hours
Use: Daily or as-needed
Vardenafil (Levitra)
Best for balanced onset and potency.
Duration: 4–6 hours
Use: As-needed
Compare ED Treatment Options
Explore prescription-based ED medication options online.
Explore prescription-based ED medication options online.
Medication Comparison Table
| Feature | Sildenafil | Tadalafil | Vardenafil |
|---|---|---|---|
| Onset | 30–60 min | 30–60 min | 30–60 min |
| Duration | 4–6 hours | Up to 36 hours | 4–6 hours |
| Daily use | No | Yes | No |
| Food interaction | Moderate | Minimal | Moderate |
Key Differences
Sildenafil is the most widely used ED medication, while tadalafil offers the longest duration and greatest flexibility. Vardenafil provides a balanced alternative with similar timing but slightly different patient response.
Frequently Asked Questions
All three medications are highly effective. The best option depends on individual response, duration preference, and lifestyle.
Tadalafil lasts the longest, up to 36 hours, compared to sildenafil and vardenafil which last about 4–6 hours.
All three typically start working within 30–60 minutes depending on food intake and individual metabolism.
Side effects are similar across all PDE5 inhibitors and may include headache, flushing, and nasal congestion.