The medication should be taken once daily at about the same time every day to maintain a consistent level of medicine in the body. Tadalafil will make these symptoms less severe and reduce the chance that prostate surgery will be needed. Cialis is approved in adults assigned male at birth; it is not approved for use in children or adolescents. Its effects might last longer if you have mild to moderate ED. Others may find that it takes Cialis closer to eight hours to work and take the medication well before sexual activity. It belongs to the drug class known as PDE5 inhibitors. What does this mean? · 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. The penis is one of the areas where .  · Cialis is available in a generic form called tadalafil. A generic drug is an exact copy of the active drug in a brand-name medication. The generic is considered to be as safe and effective as the. Tadalafil – STADA T20 – 20 Milligramm. Tadalafil, sold under the brand name Cialis among others, is a medication used to treat erectile dysfunction, benign prostatic hyperplasia, and pulmonary arterial hypertension. It is taken by mouth. Onset is typically within half an hour and the duration is up to 36 hours. Common side effects include headache, muscle pain, .