Vasoconstrictive complications or ergotism (eg, ischemia, cold extremities, vasospasm, ECG changes, hyper- or hypotension, numbness, gangrene, dizziness), precordial or muscle pain, tachycardia ...

Peripheral Vasoconstrictive Disease Published June 22, 1961 N Engl J Med 1961;264: 1299 - 1301 ...