Addyi may boost sex drive in women with low sexual desire who find the experience distressing. Its effects often last for 4 to 5 hours. Erectile dysfunction can be caused by a variety of factors , including age, cardiovascular problems, diabetes, and other conditions that affect nerve function or blood flow. A phone or video consultation is sometimes required for legal purposes. Oral medicines for ED usually work well and cause few side effects. · Given the success of drugs to treat erectile dysfunction, such as sildenafil (Viagra), tadalafil (Cialis) and vardenafil (Levitra, Staxyn), drug companies have sought . Viagra, Cialis, Levitra, and Stendra are oral medications used to treat erectile dysfunction (ED). You may also know them by their generic names: sildenafil . This medication is not usually used in women. It is unlikely to be used during pregnancy or breast-feeding. Consult your doctor if you have any questions about this medication.