Finding an online ED provider can feel overwhelming. Some services offer a subscription option where they’ll send your medications every month at a discount. This information is reviewed by a licensed practitioner who will assess your eligibility for the medication. According to the FDA, generic medications contain the same active ingredients as brand names, meaning there’s no difference in effectiveness or safety. Most erectile dysfunction medications belong to the drug class known as PDE5 inhibitors , which help relax the muscles and increase blood flow to allow for a full erection.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, . Tadalafil is the generic name for the brand-name drug Cialis. At the time of publishing, the average cash price of 30, milligram (mg) Cialis tablets is approximately $2,, whereas. Generic Cialis (tadalafil): $11 per 5 mg pill, $44 per 10 mg or 20 mg pill; All PDE5 inhibitors, including Viagra and Cialis, require a valid prescription regardless of the pharmacy or provider. Other warning signs of an unsafe online pharmacy include outdated medication, no customer service, or suspiciously low prices.