What special precautions should I follow? Read our editorial process. Those with pre-existing conditions should always consult a healthcare provider before taking new medications or supplements. What should I do if I forget a dose? Patients should seek prompt medical attention if their erection lasts longer than four hours. · Description and Brand Names. Drug information provided by: Merative, Micromedex ®. US Brand Name. Adcirca. Cialis. Descriptions. Tadalafil is used to treat . 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 . 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, .