What should I do if I forget a dose? John’s wort. Continue to take tadalafil even if you feel well. There is an approved generic for Cialis known as tadalafil that is available in the United States. If you are taking tadalafil to treat PAH or BPH, follow your doctor’s directions and the guidelines in this paragraph. Once all requested paperwork is received from you and your healthcare provider, your first order of medication is typically delivered within 2 to 4 weeks, we then continue to manage ongoing refills month after month. Is there a Cialis generic available?VAT 20%: $. Total: $. Contact. After taking a single tablet, some of the active ingredient of Cialis remains in your body for more than 2 days. Cialis is a brand of tadalafil, one of the most popular medications to treat erectile dysfunction (ED).It was first approved in . Tadalafil is a generic medication for ED, and a person can expect to pay in the region of $ each month for this drug. The brand-name version of tadalafil is Cialis, which can sometimes. Find information on tadalafil and cost, how generic and brand-name prices compare, what financial assistance is available, and more. Health Conditions Featured Breast Cancer IBD Migraine.