Intramuscular olanzapine and intramuscular haloperidol in acute schizophrenia: antipsychotic efficacy and extrapyramidal safety during the first 24 hours of treatment.
Wright P, Lindborg SR, Birkett M, Meehan K, Jones B, Alaka K, Ferchland-Howe I, Pickard A, Taylor CC, Roth J, et al. Can J Psychiatry. 2003 Dec; 48(11):716-21.