Patients should seek prompt medical attention if their erection lasts longer than four hours. Tadalafil may not be safe for people with certain medical conditions, including people who have had a stroke , have coronary heart disease or retinitis pigmentosa an eye disease. The safety and effectiveness of Cialis when used with other treatments for impotence has not been studied. How will Cialis be supplied? Can Cialis be used with other treatments for impotence?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 Cost: Roman offers both brand name Cialis and generic Cialis (tadalafil) that can be taken as needed or on a daily basis at a lower dose. Here’s a breakdown of what you can expect to pay for. And generics tend to cost less than brand-name drugs. Cialis treats erectile dysfunction, benign prostatic hyperplasia, or both. Adcirca and Alyq treat pulmonary arterial hypertension.