The drug is approved for use in adults. Healthcare providers have experience talking about ED and providing treatment options without any judgment or shame. Generic medicines contain the same active ingredient and are equally effective and medically equivalent as the branded products but are available at a lower price. Viagra can be taken as long as four hours or as little as 30 minutes before sex. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy. Cialis Daily goes one step further to provide you with a ceaseless solution to erectile dysfunction.Dosing Guidelines Cialis is a prescription medication containing the active ingredient tadalafil. Cialis belongs to a group of medications known as phosphodiesterase-5 (PDE-5) inhibitors. Healthcare providers commonly prescribe tadalafil to treat erectile dysfunction (ED). Depending on your symptoms and needs, you may be prescribed Viagra, sildenafil, Cialis, tadalafil, Stendra, paroxetine, or a combination of tadalafil and sildenafil, available as mints or pills. Prices range from $3 to $ per dose or $82 to $ for a monthly supply, depending on the medication. Cialis isn’t available over the counter. Your doctor has to prescribe Cialis for ED or other conditions the medication treats. You may also be able to obtain this medication with the help.