Sildenafil is a medication used to treat erectile dysfunction and pulmonary arterial hypertension. It works by increasing blood flow to the penis during sexual stimulation.

The typical starting dose for sildenafil is 50 mg, taken about one hour before sexual activity. However, it can be adjusted based on effectiveness and tolerance.

Common side effects of sildenafil include headaches, flushing, and upset stomach. Serious side effects may occur, and it’s important to consult a healthcare provider if they arise.