Revatio 20 mg utilizes sildenafil as its primary component, which functions by inducing relaxation and dilation of the blood vessels within the penile area. This action leads to enhanced blood circulation in sensitive areas, facilitating the achievement of an erection in men. Additionally, Revatio 20 mg is prescribed for the treatment of pulmonary hypertension. In cases where this medication is recommended for erectile dysfunction, it is exclusively administered to men, with a minimum interval of 24 hours between each dosage.