Men with erectile dysfunction (ED) are the main patients for the medicine Vilitra 20 mg. Vardenafil, the active component, is a member of the phosphodiesterase type 5 (PDE5) inhibitors pharmacological class. Tadalista 20 treats ED with Tadalafil. Kamagra Oral Jelly, with Sildenafil, offers a flavoured alternative. This family of drugs acts by augmenting the physiological effects of nitric oxide, which is a naturally occurring molecule that relaxes the muscles in the penis.