How Long Does Sildenafil Last? Duration, Onset & Effect Timeline

Quick Summary

Sildenafil (Viagra) is a short-acting PDE5 inhibitor used for erectile dysfunction. It starts working within 30–60 minutes and has a limited active window.

Onset: 30–60 minutes
Peak effect: 1–2 hours
Total duration: 4–6 hours

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Sildenafil Effect Timeline

0–30 min

Absorption Phase

Medication enters bloodstream. No visible effect yet.

30–60 min

Onset Phase

Initial response begins with sexual stimulation.

1–2 hours

Peak Effect

Maximum effectiveness window.

What Affects Duration?

Food intake (especially high-fat meals)
Age and metabolism
Dosage (25mg / 50mg / 100mg)
Liver function
Alcohol consumption

Sildenafil vs Other ED Medications

Sildenafil has a shorter duration compared to tadalafil, making it more suitable for planned use rather than extended spontaneous activity.

FAQ

Sildenafil typically lasts 4–6 hours depending on dose and individual response.

It usually starts working within 30–60 minutes.

Food does not change total duration but may delay onset, especially high-fat meals.

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