This medication is taken with or without food an hour before sex. 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. Still other online pharmacies specialize in medications for only a select few health concerns or conditions. Vardenafil usually works for 4 to 5 hours. A newer form of the medicine that dissolves on the tongue might work faster than the pill that you swallow. You can take it in a small dose daily or in a larger dose as needed. Finding an online ED provider can feel overwhelming.Sildenafil (Viagra). Tadalafil (Cialis). Vardenafil. These medicines are called PDE5 inhibitors. They enhance the effects of a chemical the body makes that relaxes Missing: store. Order Status Records Transfer Request New Auto Refills Drug Info Contact Lenses Back Contact Lenses Reorder Contact Lenses Shop All Contact Lenses Eye Health .  · Sildenafil is used to treat men who have erectile dysfunction (also called sexual impotence). Sildenafil belongs to a group of medicines called phosphodiesterase Missing: store.