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Draft — pending medical review. Educational only, not medical advice.
Sexual Health
Cialis vs. Viagra
Both treat erectile dysfunction as PDE5 inhibitors, but they differ in timing.
The main difference
Tadalafil (Cialis) lasts much longer — up to 36 hours — while sildenafil (Viagra) acts for a few hours. Cialis also has a low daily-dose option.
Choosing one
The right choice depends on your preferences, other medications, and health history. A clinician will help you decide.
Have questions about your care?Talk to a clinician