Tadalafil is a generic drug prescribed for erectile dysfunction and other conditions. Learn about the drug’s dosages, form, strengths, and more. Tadalafil - STADA T20 - 20 milligram Tadalafil, sold under the brand name Cialis among others, is a medication used to treat erectile dysfunction, benign prostatic hyperplasia, and pulmonary arterial hypertension. [4][5][7] It is taken by mouth. [7] Onset is typically within half an hour and the duration is up to 36 hours. [7] Common side effects include headache, muscle pain, flushing, and. Cialis is a phosphodiesterase 5 (PDE5) inhibitor for the treatment of erectile dysfunction and benign prostatic hyperplasia. Cialis is an ED medication you can take once daily or as needed before sexual activity. Learn how to take Cialis and avoid side effects. What is Cialis used for? Cialis is a versatile drug with a few different applications. Aside from erectile dysfunction, tadalafil can effectively treat benign prostatic hyperplasia (BPH). BPH is an enlargement of the prostate gland that can cause urinary symptoms, such as a frequent need to urinate or an inability to fully empty the bladder during urination. Cialis (tadalafil) increase increases blood flow to a certain area of the body and is used to treat erectile dysfunction (impotence). Includes Cialis side effects, interactions and indications. Cialis (tadalafil) is a prescription tablet used for erectile dysfunction and benign prostatic hyperplasia. Learn about dosage, side effects, and more. Tadalafil (Eqv-Cialis): side effects, dosage, interactions, FAQs, reviews. Used for: benign prostatic hyperplasia, erectile dysfunction, pulmonary arterial hypertension If you take tadalafil for pulmonary arterial hypertension, do not take Cialis® or other PDE5 inhibitors, including sildenafil (Revatio® or Viagra®) or vardenafil (Levitra®). Cialis® also contains tadalafil. If you take too much tadalafil or take it together with these medicines, the chance for side effects will be higher. Find patient medical information for Tadalafil (Cialis, Adcirca, and others) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings.