Although erectile dysfunction (ED) may be an upsetting diagnosis for some, many people find their condition is treatable with Viagra — sometimes called the “little blue pill” — and .A newer form of the medicine that dissolves on the tongue might work faster than the pill that you swallow. It might work longer if you have mild to moderate erectile dysfunction. Take sildenafil as needed before sexual activity. If you prefer, you may contact the U. This boosts blood flow and helps you get an erection from sexual activity. They include dutasteride Avodart, Jalyn and finasteride Propecia, Proscar. Please expect up to 4 to 6 weeks for reimbursement.Oral medicines for ED usually work well and cause few side effects. The four main medicines taken by mouth for erectile dysfunction are: Avanafil (Stendra). Sildenafil (Viagra). Tadalafil (Cialis). Vardenafil. These medicines are called PDE5 inhibitors.  · Sildenafil is used to treat men who have erectile dysfunction (also called sexual impotence). Sildenafil belongs to a group of medicines called phosphodiesterase 5 (PDE5) inhibitors. These medicines prevent an enzyme called phosphodiesterase type-5 from working too quickly. The penis is one of the areas where this enzyme works. Never take more than mg of Viagra in a hour period. Too much Viagra can cause severe headache, low blood pressure, and orthostasis (drop in blood pressure when standing) that can lead to.This medicine works best when you take it on an empty stomach an hour before sex. If you are a Mayo Clinic patient, this could include protected health information. When oral medications might not be safe Check with your health care team before you take any medicine for erectile dysfunction. Take sildenafil at around the same times every day. When choosing one, tell your doctor or other health care professional what your preferences are, such as cost, ease of use, how long the drug’s effects last and side effects. Other uses for this medicine This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.