Sildenafil vs Tadalafil: Key Differences for ED Treatment
Written by Vitalis Editorial Team
Medically reviewed by Vitalis Clinical Team · Reviewed August 2026
Last updated August 2026
Overview
Sildenafil and tadalafil are both PDE5 inhibitors approved for erectile dysfunction. They work similarly but differ in timing, duration, and dosing flexibility. Neither is universally superior — the best choice depends on your health, lifestyle, and how you prefer to plan sexual activity.
How to think about the choice
Some men prefer sildenafil for predictable, shorter windows. Others prefer tadalafil for longer duration or daily low-dose options. Side effects, other medications, cardiovascular health, and cost also factor into the decision.
A licensed clinician evaluates your full health picture before recommending either medication.
| Factor | Sildenafil | Tadalafil |
|---|---|---|
| Typical onset | 30–60 minutes | 30–60 minutes (as-needed) |
| Typical duration | About 4–6 hours | Up to 36 hours (as-needed) |
| Daily dosing option | Not typically used daily | Available as daily low dose |
| Food interaction | High-fat meals may delay onset | Less affected by food |
| Drug class | PDE5 inhibitor | PDE5 inhibitor |
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