Quick Summary
Viagra (Sildenafil)
Short-acting PDE5 inhibitor.
Onset: 30–60 minutes
Duration: 4–6 hours
Use: As-needed
Cialis (Tadalafil)
Long-acting PDE5 inhibitor.
Onset: 30–60 minutes
Duration: up to 36 hours
Use: As-needed or daily
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Check available ED medications and treatment plans.
Comparison Table
| Feature | Viagra (Sildenafil) | Cialis (Tadalafil) |
|---|---|---|
| Onset | 30–60 min | 30–60 min |
| Duration | 4–6 hours | Up to 36 hours |
| Daily use | No | Yes |
| Food interaction | Moderate (fat delays absorption) | Minimal |
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Compare Viagra and Cialis treatment options.
Compare Viagra and Cialis treatment options.
Key Differences
Viagra is best suited for short-term, planned use before sexual activity. Cialis provides a much longer duration and greater spontaneity.
Both medications are effective PDE5 inhibitors, but differ significantly in pharmacokinetics and lifestyle flexibility.
Frequently Asked Questions
Cialis (tadalafil) lasts up to 36 hours, while Viagra (sildenafil) lasts about 4–6 hours.
Both typically start working within 30–60 minutes.
Cialis is better for spontaneity due to its long duration.
Yes, Cialis can be prescribed as a low-dose daily medication.
Both have similar side effects, including headache and flushing. Individual tolerance varies.