Zydus Cadila has received the final approval from the USFDA to market Clonidine Hcl Injection 0.1 and 0.5 mg/ml, 10 ml. Clonidine hydrochloride injection is a centrally-acting analgesic solution for use in continuous epidural infusion devices which is indicated in combination with opiates for the treatment of severe pain in cancer patients that is not adequately relieved by opioid analgesics alone.