Your doctor will help you decide the best time for you to take tadalafil before sexual activity. Avoid drinking alcohol. You may attempt sexual activity at any time between doses. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. If you think you or someone else may have overdosed on: Cialis Tadalafil , call your doctor or the Poison Control center. If we combine this information with your protected health information, we will treat all of that information as protected health information and will only use or disclose that information as set forth in our notice of privacy practices. · The Cialis brand of tadalafil is used in men to treat erectile dysfunction (impotence) and symptoms of benign prostatic hypertrophy (enlarged prostate). Adcirca and Alyq are used in men and women.  · Descriptions. Tadalafil is used to treat men who have erectile dysfunction (also called sexual impotence). Tadalafil belongs to a group of medicines called phosphodiesterase 5 (PDE5) inhibitors. These medicines prevent an enzyme called phosphodiesterase type-5 from working too quickly. We have good news for you: generic Cialis, used to treat erectile dysfunction (ED)and enlarged prostates, just hit pharmacies. Prices for the generic, known as tadalafil, are more than 50% less than those of brand-name Cialis. As more men are able to afford tadalafil and treat their ED, it’s likely that many will have questions.