Zenegra 50mg Tablet contains Sildenafil citrate, a phosphodiesterase type 5 (PDE5) inhibitor, indicated primarily for the treatment of erectile dysfunction (ED) in adult males. Sildenafil acts by selectively inhibiting PDE5, an enzyme responsible for the degradation of cyclic guanosine monophosphate (cGMP) in the corpus cavernosum. This inhibition enhances the effects of nitric oxide released during sexual stimulation, leading to increased levels of cGMP, smooth muscle relaxation, and improved blood flow to the penile tissue, thereby facilitating the achievement and maintenance of an erection. Zenegra 50mg is typically administered orally, approximately 30 to 60 minutes before anticipated sexual activity, with effects lasting up to four hours. It should be used under medical supervision, considering contraindications such as concurrent nitrate therapy, severe cardiovascular disorders, or hypersensitivity to Sildenafil. Common adverse effects may include headache, flushing, dyspepsia, nasal congestion, and dizziness. Patients are advised to avoid excessive alcohol consumption and grapefruit products while using this medication. Dose adjustments may be necessary in patients with hepatic or renal impairment. Zenegra 50mg is not indicated for use in women or pediatric patients. Proper consultation with a healthcare provider is essential to ensure safety and efficacy.