A pilot exploration of the antiemetic activity of olanzapine for the relief of nausea in patients with advanced cancer and pain.

This open-label pilot study explored the antiemetic activity of olanzapine, an atypical antipsychotic, in patients with advanced cancer requiring opioid analgesics for pain. Fifteen patients received 2 days of a washout and placebo "run-in" followed by two day periods on each of three doses of olanzapine (2.5 mgs, 5 mgs, and 10 mgs).