Sildenafil may be used to treat erectile dysfunction (ED or impotence) in men (Viagra brand) or pulmonary arterial hypertension in both men and women (Revatio brand), depending .Don’t let ED ruin your fun – get help, today! The standard dose, the 50mg Viagra is sold over the counter as Viagra Connect. It’s nothing to feel embarrassed about. However, one of the easiest, most effective, and best-known treatments for erection problems is Viagra. Oral medicine for ED also might not be safe or work well if you have: Very low blood pressure, called hypotension, or uncontrolled high blood pressure, called hypertension. Other ED treatments include Cialis, which is powered by the active ingredient Tadalafil. They include dutasteride Avodart, Jalyn and finasteride Propecia, Proscar.The four main medicines taken by mouth for erectile dysfunction are: Avanafil (Stendra). Sildenafil (Viagra). Tadalafil (Cialis). Vardenafil. These medicines are called PDE5 . Sildenafil (Viagra) is often the first drug your doctor offers. It’s been on the market longest and its side effects and the medications and foods it interacts with are well known. But . Viagra (sildenafil) is a prescription drug that’s used to treat erectile dysfunction (ED). The drug comes as a tablet you’ll take by swallowing. It’s usually taken as needed about 1 .You can take it in a small dose daily or in a larger dose as needed. Your doctor or other health care professional can recommend one for you based on these factors, other health conditions you have and any other medicines you take. It might work longer if you have mild to moderate erectile dysfunction. This tends to be more affordable, but it has the same safety profile and efficacy as the branded drug — and is available in the same dosages. All Viagra is the same — powered by the same active ingredient, Sildenafil. Avanafil Stendra. What’s the correct dosage of Sildenafil Viagra?