FDA-approved Cialis tablets made by Eli Lilly contain the active ingredient, tadalafil, and are used for the treatment of erectile dysfunction and other approved indications. To prevent stomach problems, have a small meal before or after you take Cialis. What is Cialis? Counterfeit medicines can be very dangerous. The medication will be effective for up to 36 hours.AdWith RexMD you’re saving time and money with our ED delivery. Get started now. Reliable E.D. meds prescribed by real doctors. Get your free & private online visit todayFree Shipping · Discreet Packaging · Real Doctors · Personalized Plan/5 (3, reviews)Sexual health: Premature Ejaculation · Erectile Dysfunction · Breakouts.  · Cialis is a prescription drug used to treat erectile dysfunction and benign prostatic hyperplasia. Learn about its dosages, form, strengths, and more. Healthline has made every effort to make. Tadalafil (Cialis) is a medicine used to treat erectile dysfunction (ED, also called impotence) and problems with urination caused by an enlarged prostate (benign prostatic hypertrophy or BPH). Tadalafil works by helping to relax the blood vessels in the penis, allowing blood to flow into the penis, and causing an erection.