How Long Does Sildenafil Last?
For many men, sildenafil's effect window is about four to six hours after it starts working. Onset is often 30–60 minutes. High-fat meals can delay it. Individual response varies, and sexual stimulation is still required.
Written by Want Ready Editorial Team
Medically reviewed by Want Ready Clinical Team · Reviewed August 2026
Last updated August 2026
Typical timing
Sildenafil does not create an erection by itself. After it is absorbed, it can make it easier to get an erection with stimulation for a limited window. Many educational sources describe a roughly 4–6 hour window, which is shorter than tadalafil's as-needed window for many men.
Your experience may be shorter or longer. Age, other medicines, liver or kidney function, and meal timing can change the curve.
What can change the experience
A high-fat meal may delay onset. Alcohol can worsen erectile function even if the medication is in your system. Anxiety can override an otherwise adequate dose. If the medication seems to do nothing, that is information for your clinician — not a reason to double a dose on your own.
Duration vs. the right medicine
If you want a longer window or less planning, ask about tadalafil or other clinically appropriate options. Duration preference is a legitimate part of shared decision-making. It is not the only factor; safety and other medications come first.
Common questions
Sources
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