Silagra 100 mg Tablet is a medication manufactured by Incepta Pharmaceuticals Ltd., containing Sildenafil Citrate, a selective inhibitor of phosphodiesterase type 5 (PDE5) . It is primarily indicated for the treatment of erectile dysfunction (ED) in men, characterized by the inability to achieve or maintain a penile erection sufficient for satisfactory sexual performance. Sildenafil enhances the effect of nitric oxide (NO) by inhibiting PDE5, leading to increased levels of cyclic guanosine monophosphate (cGMP) in the corpus cavernosum, resulting in smooth muscle relaxation and increased blood flow to the penis . Silagra is effective only in the presence of sexual stimulation. It is also indicated for the treatment of pulmonary arterial hypertension, improving exercise capacity and delaying clinical deterioration .