The four main medicines taken by mouth for erectile dysfunction are: Avanafil Stendra. Take both tablets one after the other. Stop using tadalafil and call your doctor at once if you have: heart attack symptoms–chest pain or pressure, pain spreading to your jaw or shoulder, nausea, sweating; vision changes or sudden vision loss; ringing in your ears or sudden hearing loss; or an erection is painful or lasts longer than 4 hours prolonged erection can damage the penis. How oral medicines differ Each oral medicine for ED has a slightly different chemical makeup. This leads to more blood flow to the penis, leading to stronger erections. BPH occurs when the prostate and the surrounding tissues become enlarged. Oral medicine for ED also might not be safe or work well if you have: Very low blood pressure, called hypotension, or uncontrolled high blood pressure, called hypertension.Cialis (tadalafil) is a member of the impotence agents drug class and is commonly used for Benign Prostatic Hyperplasia, and Erectile Dysfunction. The cost for Cialis oral tablet mg is around $ for a supply of 30 tablets, depending on the pharmacy you visit. It works by blocking PDE This is a protein in your body that breaks down the molecules that normally cause an erection. When it blocks PDE-5, tadalafil (Cialis) helps an erection occur by allowing certain muscles in . Oral Tablet. mg tadalafil oral tablet. from $ for 30 tablets. 5 mg tadalafil oral tablet. from $ for 90 tablets. 10 mg tadalafil oral tablet. from $ for 4 tablets. .