Since the introduction of the first PDE-5 inhibitor (Viagra) to the market in 1998 this niche has exploded and caused a revolution in erectile dysfunction treatment. It was not only a medical change, but a cultural and behavioral too, as people started talking openly about their sexual problems.
Today there are three most popular oral medications used to treat impotence in men: Viagra, Levitra and Cialis. All three have practically the same mechanism of action, because all three are PDE-5 inhibitors. What is different with these drugs is the duration of the effect and how quickly it starts to work.
Viagra was the first Ed drug to be introduced and has literally made the market for this type of drugs. It usually takes about an hour to start having effect and lasts about four hours. Viagra should not be taken with food and there's a set of health conditions it's not quite safe to use with.
Levitra followed Viagra and showed certain improvements over it. It can be taken during a meal and is quite safe to use with heart conditions and other health problems that made Viagra dangerous to use.
Cialis was the last PDE-5 inhibitor introduced and its developers paid particular attention to the long-lasting effect of the drug. It usually starts working within 15 minutes and its effects last up to 36 hours in some cases.
But before you start using any of these drugs, you first have to consult with your doctor and choose which one is the right option for you.