· Description and Brand Names Drug information provided by: Merative, Micromedex ® US Brand Name Adcirca Cialis Descriptions Tadalafil is used to treat .If you are taking tadalafil for erectile dysfunction, your doctor will probably start you on an average dose of tadalafil and increase or decrease your dose depending on your response to the medication. Tadalafil belongs to a group of medicines called phosphodiesterase 5 PDE5 inhibitors. You should only be treated with one of these products at a time. To prevent stomach problems, have a small meal before or after you take Cialis. Tadalafil works on the PDE5 enzyme in the lungs to relax the blood vessels.Drug Images Cialis (tadalafil) is a brand-name drug that’s prescribed for erectile dysfunction (ED) and benign prostatic hyperplasia (BPH). Cialis comes as an . Tadalafil Brand names: Cialis, Adcirca. Tadalafil. Find out how tadalafil treats erectile dysfunction, pulmonary hypertension and benign prostate enlargement, and how to take it. Tadalafil (Cialis) is used to treat erectile dysfunction (ED, impotence; inability to get or keep an erection), and the symptoms of benign prostatic hyperplasia (BPH; an enlarged prostate) which include difficulty urinating (hesitation, dribbling, weak stream, and incomplete bladder emptying), painful urination, and urinary frequency and urgency in adult men.Taking more than 1 dose every 24 hours can cause heart issues and other problems. Tadalafil will make these symptoms less severe and reduce the chance that prostate surgery will be needed. For further information contact your pharmacist or Eli Lilly and Company directly. Continue to take tadalafil even if you feel well. Before taking tadalafil, tell your doctor and pharmacist if you are allergic to tadalafil, any other medications, or any of the ingredients in tadalafil tablets. Avoid eating a large meal or a lot of food, as this can slow down the effects of the drug.