Push the plunger of the syringe, then insert the tip into the bottle while holding the bottle upright on a flat surface. This is a type of high blood pressure that occurs between the heart and the lungs. Sildenafil is also used in both men and women to treat the symptoms of pulmonary arterial hypertension. Do not take more or less of it or take it more often than prescribed by your doctor. Different brands may not work the same way.Sildenafil (Liqrev, Revatio) is used to improve the ability to exercise in adults (Liqrev, Revatio) and children 1 year of age and older (Revatio) with pulmonary arterial . Revatio Viagra Descriptions Sildenafil is used to treat men who have erectile dysfunction (also called sexual impotence). Sildenafil belongs to a group of medicines called . Generic Viagra (sildenafil) is an alternative to the branded Viagra drug that can be used for treating erectile dysfunction (ED). It’s now sold by many manufacturers, including .