<prompt> Tolazoline is:-Thrombin inhibitorVasodilatorVasoconstrictorAntispasmodic  <response>: Phentolamine and Tolazoline are non-selective alpha blockers. Cause vasodilation in peripheral vessels Used in Raynauds disease and enhance angiography in peripheral vessels Alpha 1 agonist Phenylephrine are vasoconstrictors. Anticholinergic drugs like dicyclomine are used as antispasmodics. Indirect thrombin inhibitors: Heparin, LMWH, Fondaparinux, Danaparoid. Direct thrombin inhibitors: Lepirudin, Bivalrudin, Argatroban 