I.V. infiltration may lead to severe vasoconstriction and localized tissue necrosis, also gangrene of extremities, tongue, and ischemic colitis. May cause water intoxication. Use with caution in asthma, and in cardiovascular disease, including arteriosclerosis. Use with caution in goiter with cardiac complications, in history of migraines, and in renal disease, including chronic nephritis with nitrogen retention. Use with caution in history of seizure disorder, and in vascular disease. Caution in the elderly (have decreased responsiveness to vasopressin with respect to its effects on water homeostasis).