Sildenafil and tadalafil are the two most common treatments for erectile dysfunction. Both have a long track record, and both are sold as cheaper generics. The main question is usually not which one is "better", but which one matches your plans.
Sildenafil is normally taken about an hour before sex and lasts around four to five hours. A large meal can slow it generic cialis down. Generic tadalafil, on the other hand, can last for up to 36 hours, and food makes little difference. Some men also take a low daily dose of tadalafil so they never need to time a tablet.
For a side-by-side look, see this plain-English guide covers doses, timing and safety.
Before you start: never take either medicine with nitrate tablets or sprays for chest pain or with "poppers". Tell your doctor about any other medicines you take. Common side effects are headache, flushing, a blocked nose and indigestion. Seek medical help straight away for an erection lasting more than four hours or sudden changes in vision.
More is not always better. 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.
When you buy generic ED tablets online, make sure the strength matches your prescription and read the patient leaflet. A valid prescription is required for every order of a prescription medicine. There is more detail in this article.
This is general information, not medical advice. Speak to your doctor or pharmacist before starting any medicine.