Sildenafil citrate is a member of the class of medications referred to as phosphodiesterase 5 protein (PDE-5) inhibitors. This medication class aids in blood flow enhancement and vein relaxation. As a result, use it to treat pneumonic hypertension and erectile dysfunction. The sildenafil in Sildigra 100 prevents the PDE-5 from destroying cyclic guanosine monophosphate (cGMP). For cGMP, the smooth muscles of the penis are positioned more centrally, which relaxes the muscles and increases blood flow. Expanded blood enables a person to get a satisfactory penile erection.