Flibanserin is not approved in Australia. If you need emergency medical care for a heart problem, it is important that your doctor knows when you last took sildenafil. This medicine has been approved in the United States to treat premenopausal females who have low sexual desire. You can buy it from a store-based pharmacy or reputable online pharmacy with a prescription. It is not known if the medicine is safe for use in these patients. This condition may require prompt medical treatment to prevent serious and permanent damage to your penis.Sildenafil (Viagra) is used to treat erectile dysfunction (impotence; inability to get or keep an erection) in men. 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 hypertension (PAH; high blood pressure in the vessels carrying blood to the . PM EDT. A year-old Florida resident is looking at hard time after being busted for allegedly purchasing erectile dysfunction drugs without a prescription, intending to. · Viagra; Descriptions. 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 .