Eriacta 100 mg (sildenafil) duration can vary quite a bit between users because the drug doesn’t act like a constant “on/off switch” — it depends on how your body absorbs, processes, and responds to it. Typical duration (baseline) Starts working: 30–60 minutes Peak effect: 1–3 hours Usable effect window: about 3–6 hours (sometimes up to ~8 hours in some people) So most people notice it working strongly for a few hours, then gradually fading. Why duration varies between users 1. Metabolism (biggest factor) Faster metabolism → shorter duration Slower metabolism (older age, liver/kidney issues) → longer-lasting effect This is Eriacta 100 mg older users often report stronger or longer effects. 2. Food (especially heavy/fatty meals) High-fat meals slow absorption This can delay onset and sometimes make the “effective window feel shifted later” It doesn’t always increase duration — it mainly changes timing 3. Dose strength (100 mg is the max common dose) Higher dose → stronger and sometimes longer perceived effect But also higher side-effect risk (headache, flushing, low BP) 4. Health conditions Conditions like: Diabetes High blood pressure Heart disease Liver/kidney problems can all change how long it works or how strong it feels. 5. Other medicines Some antibiotics, antifungals, or heart medications can: Increase sildenafil levels → longer effect Or reduce effectiveness → shorter/weak effect 6. Alcohol & smoking Alcohol can reduce erection quality even if the drug is active Smoking reduces blood flow → shorter or weaker response  .