Fig. 2From: Efficacy of 1, 5, and 20 mg oral sildenafil in the treatment of adults with pulmonary arterial hypertension: a randomized, double-blind study with open-label extensionPatient disposition. Legend: TID = 3 times daily; SIL = sildenafil.*Right ventricular failure. †Drug hypersensitivity (n = 1) and rash (n = 1)Back to article page