Hyperthyroidism, nausea, metallic taste, vomiting, flushing, heat sensations, weakness, dizziness, headache, coughing, rhinitis, sweating, sneezing, lacrimation, visual & hemodynamic disturbances, pruritus, salivary gland enlargement, pallor, tachycardia, bradycardia, transient ECG abnormalities & hypotension. Pain at inj site, extravasation followed by tissue damage, thrombophlebitis, thrombosis, venospasm & embolism. Fibrinolysis, possible depressant & neurological effects, disseminated intravascular coagulation, urinary retention.