Many rogue pharmacies sell counterfeit or substandard products that can be harmful. That means eating healthy foods, exercising, getting good sleep, limiting stress, and treating other health conditions that might cause ED, like high blood pressure, heart disease, diabetes, obesity, and low testosterone, Dr. For this purpose, one dose works for up to 72 hours. Oral ED medications are generally well-tolerated, Dr. There are two different ways to take tadalafil, either daily or on an as needed basis.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 prostate) which include difficulty urinating (hesitation, dribbling, weak stream, and incomplete bladder emptying), painful urination, and urinary frequency and urgency in adult men. 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, . Is there an over-the-counter Viagra? Viagra is only available with a prescription in the United States, Canada, and most other countries. Viagra is sold under the generic name sildenafil, which Missing: mexico.