N5-(1-Iminoethyl)-L-ornithine Dihydrochloride is an inhibitor of nitric oxide synthase (NOS), an enzyme that catalyzes the conversion of L-arginine to L-citrulline and nitric oxide. It also improves cardiac function and microcirculation. N5-(1-Iminoethyl)-L-ornithine Dihydrochloride inhibits inducible NOS (iNOS). These enzymes play critical roles in a wide array of physiological and pathophysiological conditions such as blood pressure regulation, inflammation, and infection.