Without physical action to the penis, such as that occurring during sexual intercourse, tadalafil will not work to cause an erection. We prescribe 3 different doses: 5mg, 10mg and 20mg. Do I need a prescription for Tadalafil? Tadalafil is also used in both men and women to treat the symptoms of pulmonary arterial hypertension to improve your ability to exercise. The starting dose we generally recommend is the 10mg pill. This is high blood pressure that occurs in the main artery that carries blood from the right side of the heart the ventricle to the lungs. · Third-Party Discount Cards are not affiliated or owned by CVS Pharmacy. By applying a Third-Party Discount Card towards the cost of a medication, the patient is authorizing CVS Pharmacy to share information with the third-party, in order to process the claim. Any out-of-pocket costs after applying a Third-Party Discount Card will not count. The average cost for 30 Tablet(s), 5mg each of the generic (tadalafil) is $ You can buy tadalafil at the discounted price of $ by using the MDRx coupon, a . What’s more, a single dose of tadalafil lasts up to 36 hours, whereas a dose of Viagra only lasts for around four hours. Because of that, doctors typically prescribe Cialis to older men, or those who want don’t want to “plan for sex.” Does tadalafil have any side effects? Yes. Generic tadalafil has similar side effects to brand-name Cialis.