What Are the Symptoms of Erectile Dysfunction? In some cases, ED can cause a strain on relationships and impact self-esteem. The drug is approved for use in adults. Those who don’t feel comfortable discussing ED with an in-person provider or lack time to visit a doctor’s office may find online ED prescriptions beneficial. According to the FDA, generic medications contain the same active ingredients as brand names, meaning there’s no difference in effectiveness or safety. The generic versions are just as effective and much less expensive.Cialis is a popular ED medication. Find out everything you need to know about this doctor-prescribed medication including usage, effectiveness, and safety . What is Tadalafil (Cialis)? Drug Facts Common Brands Cialis Drug Class PDE-5 inhibitor Controlled Substance Classification Not a controlled medication Generic . • Cialis • Cialis • Adcirca, Alyq, and Tadliq: Form and strengths: • Oral tablet: mg, 5 mg, 10 mg, or 20 mg • Oral tablet: mg, 5 mg, 10 mg, or 20mg • Oral tablet: .