Ornipressin is a

vasoconstrictor Vasoconstriction is the narrowing of the blood vessels resulting from contraction of the muscular wall of the vessels, in particular the large arteries and small arterioles. The process is the opposite of vasodilation, the widening of blood vess ...

, haemostatic and renal agent.

References

Peptides Vasopressin receptor agonists Antidiuretics {{systemic-hormonal-drug-stub