Fildena 100 mg tablets contain sildenafil citrate. Sildenafil citrate is a cyclic GMP tartar salt that accumulates in the body and is a means of sexual transmission through the channeling of nitric oxide. Fildena 100mg tablets is subject to the addition of PDE type 5 inhibitors. Prolonged measurement of PDE5 in the body alters cyclic GMP and therefore the possibility of lifting the penis during sexual intercourse due to erectile dysfunction.