Aviptadil is a vasoactive intestinal polypeptide (VIP) analog with strong vasodilatory effects.Aviptadil induces dilation of pulmonary vascular Chemicalbook and inhibits proliferation of vascular SMCs, platelet aggregation.Aviptadil can be used in pulmonary fibrosis, pulmonary arterial hypertension (PAH), SARS-CoV-2-induced respiratory failure, etc.