One drug used to treat pulmonary arterial hypertension (PAH) and erectile dysfunction (ED) is Malegra 200 . Sildenafil is a member of the phosphodiesterase type 5 (PDE5) inhibitors pharmacological class. Depending on the ailment being treated, these drugs either improve blood flow to the lungs or the penis.

Sildenafil increases blood flow in the penile blood arteries, which relaxes them and helps ED patients have an erection. Sexual stimulus is necessary for sildenafil to produce an erection.

Sildenafil improves blood flow and lessens symptoms like dizziness and dyspnea in PAH patients by relaxing the lungs' blood arteries.