· Cialis; Descriptions. Tadalafil is used to treat men who have erectile dysfunction (also called sexual impotence). Tadalafil belongs to a group of medicines .The enlarged prostate interferes with the normal flow of urine from the bladder and urinary tract, resulting in lower urinary tract symptoms, such as trouble urinating. Follow your doctor’s directions carefully, and ask your doctor or pharmacist to explain any part you do not understand. Interestingly, Cialis has been more linked to improved self-esteem and other psychological factors than the other PDE5 medications. Dosing Guidelines Typical Cialis dosages will differ depending on the conditions it’s prescribed to treat as well as other factors. For further information contact your pharmacist or Eli Lilly and Company directly. Tadalafil may cause side effects.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 . 1. What is Cialis used to treat? Cialis is approved for the treatment of men who experience difficulty having and maintaining an erection (impotence). 2. How does Cialis work? .  · Cialis; Descriptions. Tadalafil is used to treat men who have erectile dysfunction (also called sexual impotence). Tadalafil belongs to a group of medicines .If you are taking tadalafil on a regular schedule, take it at around the same time every day. It works to treat erectile dysfunction by increasing blood flow to the penis during sexual stimulation. Cialis is also highly effective in reducing the symptoms of BPH. BPH occurs when the prostate and the surrounding tissues become enlarged. Men with BPH usually have difficulty urinating, a decreased flow of urination, hesitation at the beginning of urination, and a need to get up at night to urinate.