When hypertension occurs in the lungs, the heart must work harder to pump enough blood through the lungs. Men over 50 may experience a natural decline in these GNC Testosterone: Understanding the Benefits and Available Products Testosterone plays a crucial role in regulating multiple body functions, especially in men. This increased blood flow can cause an erection. Keep from freezing. It lasts 4 to 5 hours, or longer if you have mild to moderate ED. What special precautions should I follow?Drug Images What is Viagra? If you have erectile dysfunction (ED), your doctor may recommend that you take Viagra. It’s a prescription drug that’s used in . · Sildenafil is used to treat men who have erectile dysfunction (also called sexual impotence). Sildenafil belongs to a group of medicines called phosphodiesterase . · Products and services Proper Use Drug information provided by: Merative, Micromedex ® Use sildenafil exactly as directed by your doctor. Do not use more of it .
