Tadalafil is approved by the FDA to treat erectile dysfunction. It’s best to check your chosen provider’s site for more information. Never purchase ED medications from a site or service that doesn’t require a prescription and medical documentation. Generic vs. Your health information should remain between your provider and yourself.Tadalafil (Cialis) is taken by mouth either as needed before sexual activity or once daily for erectile dysfunction (ED).It’s also taken once daily to treat symptoms from . Note: Some pharmacies do not allow the savings card to be used for opioid drugs. How much does tadalafil or cialis cost near you? Find the best tadalafil or cialis prices near . Tadalafil (Generic for Cialis) Tablets · 20mg · 6-day supply. With insurance. est. $ Estimated insurance price. Final price varies with your insurance. Without insurance. .