If you are taking the 2. Tadalafil has a long duration of action and lasts for up to 36 hours. It has the same active ingredient as Cialis , but it is the generic non-branded version. Interested in finding out more about treating ED? It is not known if tadalafil is effective in patients who have had pelvic surgery or removal of all or part of the prostate gland. The manufacturer’s patient leaflet included in packs contains a full list of side effects.Find information on tadalafil and cost, how generic and brand-name prices compare, what financial assistance is available, and more. Find information on tadalafil and cost, how generic. For instance, let’s say you’re paying cash (without insurance) for tadalafil and you get thirty 5 mg tablets for $32 with a GoodRx coupon. Let’s say you need at least 90 tablets over the next few months. You could either pay $96 for three pill prescriptions, or only around $80 for a single prescription of 90 tablets with a GoodRx coupon. With a Goodrx discount, the price for the generic version of Cialis (tadalafil) 5 mg is about $8 for 15 tablets. The brand version costs about $ What is the price of Cialis 20 mg?