A member asked:

Is it true that viagra (sildenafil) is nothing more than nitric oxide?

A doctor has provided 1 answer
Dr. James Lin answered

Yes or not...: Nitric oxide (no) is a potent vasodilator - a natural molecule along the biological process of generating erection. Viagra, (sildenafil) a pde-5 inhibitor, blocks the process of "digesting" no so to exaggerate the concentration of no leading to enhance natural process of erection by relaxing smooth muscles inside penile sponge cylinders. But there's no vehicle to deliver the free form of no.

Answered 5/28/2020

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