Forzest 20 mg you mean the tablet containing tadalafil 20 mg, it is a PDE-5 inhibitor used mainly for erectile dysfunction (ED). For a younger adult man, its effects are generally the same as in older adults: Helps erections: It increases blood flow to the ***** when you are *****ly stimulated. It does not automatically cause an erection or increase ***** desire. Long duration: A dose can improve erectile function for up to about 36 hours. Common side effects: headache, flushing, indigestion, nasal congestion, back pain, muscle aches, or dizziness. 20 mg is a relatively strong as-needed dose. Standard prescribing information lists 10 mg as the usual starting dose, increased to 20 mg if needed and tolerated; it should not be taken more than once a day. It doesn't permanently increase ***** size, testosterone, fertility, or ***** stamina. Is it harmful for younger men? Being young does not by itself make tadalafil dangerous, but a healthy young man who doesn't have ED generally has little medical reason to take 20 mg. Taking it recreationally can expose you to side effects without providing a necessary benefit. Important: Never combine tadalafil with nitrate medicines (such as nitroglycerin) because blood pressure can fall dangerously low. Combining it with other ED medicines/PDE-5 inhibitors is also not recommended. An erection lasting more than 4 hours is an emergency and needs immediate medical attention because it can permanently damage erectile tissue. Sudden vision or hearing loss also requires urgent medical assessment. If you tell me your age and whether you're considering Forzest for ED, performance anxiety, or just to last longer, I can explain whether 20 mg makes sense and what the safer options are.