depends on its mechanism of action - 5HT2A/C antagnoism will have antiemetic action due to the serotonin involvement
however, do note that it will only be an effective antiemetic if the cause of emesis is an imbalance in the serotonin system. I am not well versed in the SN protocol, but perhaps you may find this thread of use: https://sanctioned-suicide.net/threads/quetiapine-dose-for-sedation-secondary-antiemesis.82048/