How can I buy tadalafil? Tadalafil may not be safe for people with certain medical conditions, including people who have had a stroke , have coronary heart disease or retinitis pigmentosa an eye disease. BPH is caused by an enlarged prostate. Click here for an email preview. You can buy it from a store-based pharmacy or reputable online pharmacy with a prescription. This medicine is available only with your doctor’s prescription.AdNo Fees. No Sign-Up Required. Get Your Free Coupon. Don’t Pay Full Price! Save Up To 80% On Prescription Medicines. Get Your Free Rx Discount Card Here!Get The Card That Works · Track Your Medications · Accepted Nationwide · Save Up to 80%. AdNo Fees. No Sign-Up Required. Get Your Free Coupon. Don’t Pay Full Price! Save Up To 80% On Prescription Medicines. Get Your Free Rx Discount Card Here!Get The Card That Works · Track Your Medications · Accepted Nationwide · Save Up to 80%. Tadalafil Prices, Coupons and Patient Assistance Programs. Tadalafil is a member of the agents for pulmonary hypertension drug class and is commonly used for Benign Prostatic Hyperplasia, Erectile Dysfunction, and Pulmonary Arterial Hypertension.. Brand names for tadalafil include Cialis. The cost for tadalafil oral tablet 5 mg is around $27 .