Hazardous agent. Acute adrenal insufficiency may occur in face of shock, trauma, or infection. Neurotoxicity might occur with long-term (>2 years) use. Use with caution in hepatic impairment (metabolism may be decreased). Tumor tissues should be removed from metastatic masses prior to initiation of treatment (rapid cytotoxic effect may cause tumor hemorrhage). Steroid replacement with glucocorticoid, sometimes mineralocorticoid, necessary.