Male speedy erection oral medication generally refers to the medication to treat impotence or improve sexual function erection, commonly used are sildenafil, tadalafil, vardenafil and so on. Generally speaking commonly used drugs to improve impotence mainly include sildenafil, tadalafil, vardenafil, etc., which belong to phosphodiesterase type 5 (PDE5) selective inhibitors. When taken orally, these drugs can effectively help treat erectile dysfunction and improve erectile hardness. However, these drugs are contraindicated in children. Due to the large number of manufacturers on the market, the onset and duration of action varies among different classes of drugs. For example, sildenafil lasts for about 4 hours, while tadalafil can take effect within 36 hours. In addition, taking this kind of drug may lead to headache, flushing, dizziness, nasal congestion, indigestion and other adverse reactions, taking nitrate drugs and allergic to this kind of drug is prohibited. It is recommended to consult a doctor for medical advice.