Phase II study about efficacy and safety of the continuous intravenous infusion of ketamine as adjuvant to opioids in terminally ill cancer patients with refractory cancer pain.
Ketamine
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request. ### Instruction: Identify all the mentioned drugs in the given text. Text may or may not contain drug. If they contain more than 1 drug, use ";" as delimiter and join them. ### Input: Phase II study about efficacy and safety of the continuous intravenous infusion of ketamine as adjuvant to opioids in terminally ill cancer patients with refractory cancer pain. ### Output: Ketamine