The effectiveness of these infusions has never been studied. This one should be taken fifteen to thirty minutes before sex. Take care to ensure they are legit before buying anything. ED can sometimes signal an underlying medical problem, like heart disease or diabetes , that needs to be treated separately. This matters, because fake Viagra can be cut with everything from printer ink to speed.Yes, penile pumps (also known as ED pumps) are over-the-counter devices that work to treat erectile dysfunction (ED), similar to Viagra. Viagra (sildenafil) is usually the first . Sildenafil (Viagra). Tadalafil (Cialis). Vardenafil. These medicines are called PDE5 inhibitors. They enhance the effects of a chemical the body makes that relaxes muscles . Sildenafil (Viagra). Tadalafil (Cialis). Vardenafil. These medicines are called PDE5 inhibitors. They enhance the effects of a chemical the body makes that relaxes muscles in the penis, called nitric oxide. This boosts blood flow and helps you get an erection from sexual activity.