Sildenafil and tadalafil are the two best-known treatments for erectile dysfunction. Both have a long track record, and both are sold as cheaper generics. The real question is often not which one is "better", but which one matches your plans.
Generic sildenafil is normally taken about an hour before sex and lasts around four to five hours. A high-fat meal can slow it down. Tadalafil, on the other hand, can last for up to 36 hours, and food has little effect. Plenty of men also take a low daily dose of tadalafil so they do not have to plan ahead.
For a side-by-side look, this guide walks through timing, food and side effects.
Safety first: never take either medicine with nitrate tablets or sprays for chest pain or with "poppers". Let your doctor know about any alpha-blockers. Common side effects are headache, flushing, a blocked nose and indigestion. Get urgent help for an erection lasting more than four hours or any sudden loss of sight or hearing.
Do not chase higher strengths. The licensed doses are 25, 50 or 100 mg for sildenafil and 2.5 to 20 mg for tadalafil. Bigger doses do not bring better results, but they do make side effects more likely. Stick to the dose on your prescription.
If you choose to buy generic sildenafil or tadalafil online, check the strength on the pack and keep the leaflet. A valid prescription is required for every order of a prescription medicine. You can read more in this article.
This article is for general information only. Always check with your more info doctor before starting a new medicine.