Cialis tadalafil : This ED medication works with the same principle as Viagra, but lasts up to 36 hours. While each PDE5 inhibitor differs slightly, they’re very similar in treating erectile dysfunction. Read our editorial process. It’s available in 25 mg, 50 mg, and mg tablets and lasts up to 18 hours. Your primary care doctor should always know what medications you’re taking, including ED pills prescribed by another provider. Most erectile dysfunction medications belong to the drug class known as PDE5 inhibitors , which help relax the muscles and increase blood flow to allow for a full erection. Those with a history of blood pressure or heart issues, hormonal imbalances, mental health issues, and diabetes should consult their doctor before trying PDE5 inhibitors.Cialis (tadalafil) is a popular medication used to treat erectile dysfunction. It’s available in tablets ranging from mg to 20mg. It can cost more than $ for a month’s supply, depending on the dosage you need and the pharmacy you visit. Find the best tadalafil or cialis prices near you now with our cost comparison tool and start saving today. Compare prices and print coupons for Cialis (Tadalafil (Cialis)) and other drugs at CVS, Walgreens, and other pharmacies. Prices start at $