Cialis works by enhancing the effects of one of the chemicals the body normally releases into the penis during sexual arousal. We rely on peer-reviewed studies, academic research institutions, and medical associations. Tadalafil is also used in both men and women to treat the symptoms of pulmonary arterial hypertension to improve your ability to exercise. When the blood vessel muscle cells relax, this expands the vessel and increases blood flow; this effect is referred to as vasodilation. This will increase the supply of blood to the lungs and reduce the workload of the heart. Knowing that one can maintain a fulfilling intimate relationship bolsters self-esteem and overall mental health. · Treating ED and treating benign prostatic hyperplasia require different tadalafil dosages. For BPH, tadalafil is prescribed at a lower dose of 5mg. A higher Cialis dosage — usually a 10mg dose — is used for the treatment of erectile dysfunction before sexual activity. A 20 mg Cialis dose can also be used as needed for erectile dysfunction. Drug Facts. Common Brands Cialis. Drug Class PDE-5 inhibitor. Controlled Substance Classification Not a controlled medication. Generic Status No lower-cost . Tadalafil (generic Cialis) may cost less than brand-name Cialis. (Generics tend to cost less than brand-name drugs.) The price you pay for generic Cialis also depends on your treatment plan, if.