Valif Oral Jelly 20 mg is a medication used to treat erectile dysfunction (ED) in men. It contains the active ingredient vardenafil, which belongs to a class of medications called phosphodiesterase type 5 (PDE5) inhibitors. Valif Oral Jelly 20 mg works by increasing blood flow to the penis during sexual stimulation, which helps men achieve and maintain an erection. It does this by inhibiting the enzyme phosphodiesterase type 5 (PDE5), which is responsible for the breakdown of cyclic guanosine monophosphate (cGMP) in the erectile tissue of the penis. Increased levels of cGMP lead to relaxation of the smooth muscles in the penile blood vessels, allowing blood to flow into the penis and produce an erection.