Sildenafil (Viagra). Tadalafil (Cialis). Vardenafil. These medicines are called PDE5 inhibitors. They enhance the effects of a chemical the body makes that relaxes .Don’t view occasional erection problems as a reflection on your health or masculinity, and don’t automatically expect to have erection trouble again during your next sexual encounter. Treatment can be more successful for you when you involve your partner. Please expect up to 4 to 6 weeks for reimbursement. The dosages might also be unknown, or they might have been contaminated during formulation. Using this medicine with any of the following may cause an increased risk of certain side effects but may be unavoidable in some cases. Work through relationship issues. · Viagra; Descriptions. Sildenafil is used to treat men who have erectile dysfunction (also called sexual impotence). Sildenafil belongs to a group of medicines . VIAGRA can cause your blood pressure to drop suddenly to an unsafe level if taken with certain other medicines. Do not take VIAGRA if you take any other medicines called . Sildenafil (Viagra). Tadalafil (Cialis). Vardenafil. These medicines are called PDE5 inhibitors. They enhance the effects of a chemical the body makes that relaxes .Do not use more of it and do not use it more often than your doctor ordered. These medicines are called PDE5 inhibitors. If you need emergency medical care for a heart problem, it is important that your doctor knows when you last took sildenafil. This can cause anxiety, which might make erectile dysfunction worse. Here’s some information to help you get ready and know what to expect from your doctor. If too much is used, the chance of side effects is increased. Make a list of all medications, vitamins, herbal remedies and supplements you take.