Eriacta 100 mg contains sildenafil, and sildenafil can work in younger adult men when erectile dysfunction (ED) is present. Age itself does not prevent it from working. Sildenafil is specifically indicated for ED, and the usual recommended starting dose is 50 mg, with the dose adjusted according to effectiveness and tolerability; 100 mg is the maximum recommended dose for most patients and should not be taken more than once a day. D DailyMed +1 However, if you're young and having erection difficulties, it’s worth considering possible causes such as anxiety, stress, medication effects, alcohol, or other health issues rather than automatically using the highest dose. Important: sildenafil must not be taken with nitrate medicines (such as nitroglycerin) because the combination can cause a dangerous drop in blood pressure. D DailyMed If you tell me your age and whether you have ED occasionally or every time, I can explain whether 100 mg is generally appropriate and what factors to consider.