Levitra vardenafil : This medication is taken one hour before sex and can last up to 24 hours. This medicine also works best when you take it an hour before sex on an empty stomach. Payment options: Consider how you’d like to pay. It’s best to check your chosen provider’s site for more information. You can take this medicine with or without food 30 minutes before sex, depending on the dose. Other conditions that may disqualify you from an ED prescription include a history of stroke, kidney or liver disease, cancer, diabetes, or a bleeding disorder. They enhance the effects of a chemical the body makes that relaxes muscles in the penis, called nitric oxide.Tadalafil (Cialis). This medication is taken with or without food an hour before sex. It works for up to 36 hours. You can take it in a small dose daily or in a larger . We have good news for you: generic Cialis, used to treat erectile dysfunction (ED)and enlarged prostates, just hit pharmacies. Prices for the generic, .