Intravenous (IV) therapy is associated with a number of potential complications including ecchymosis, extravasation, hematoma, phlebitis, skin necrosis and air embolism. We report a case in which an intravenous injection of clindamycin dramatically produced deep cyanosis, ischemia and swelling of the injected hand which improved within 2-3 days. The underlying mechanism was possibly a vasospasm induced by the irritant action of the drug.