Men with erectile dysfunction (ED) can be treated with the drug Silagra 100 mg . Sildenafil, an inhibitor of phosphodiesterase type 5 (PDE5), is its active component. When sexual stimulation occurs, sildenafil works by boosting blood flow to the penis, which makes it easier to get and keep an erection. When sildenafil is taken, the enzyme PDE5, which breaks down cyclic guanosine monophosphate (cGMP), is inhibited. Higher concentrations of cGMP cause the smooth muscle cells in the penile blood arteries to relax, improving blood flow and making an erection easier. The symbol for the amount of sildenafil in each tablet is Silagra 100 mg.