The best one for you comes down to what kind of sex life you have. Healthcare providers have experience talking about ED and providing treatment options without any judgment or shame. Both Cialis and Viagra work quickly. The most common symptoms of erectile dysfunction include difficulty achieving or maintaining an erection and reduced sexual desire. Erectile dysfunction can be caused by a variety of factors , including age, cardiovascular problems, diabetes, and other conditions that affect nerve function or blood flow. Vardenafil usually works for 4 to 5 hours. Stendra avanafil : This is an as-needed medication taken 30 minutes before sex and can last up to six hours.While the chemical make-ups of Cialis and tadalafil may be a little different from one another, tadalafil is generally just as effective as Cialis. This means that the . Cialis Daily Generic Cialis (tadalafil) Generic Cialis (tadalafil) Roman: $90 per dose: $4-$10 per dose: $$80 per dose: $8 per dose: $$44 per dose: Hims: . 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 .