Aviptadil is an analog vasoactive intestinal polypeptide (VIP) with potent vasodilatory effects. Aviptadil induces pulmonary vasodilation and inhibits vascular SMCs proliferation, platelet aggregation. Aviptadil can be used for the research of pulmonary fibrosis, pulmonary arterial hypertension (PAH) and SARS-CoV-2 caused respiratory failure, et al.