Janet wrote: "here's the wwweb address for the complete drug monograph for olanzapine: http://www.mentalhealth.com/drug/p30-o02.html " Good stuff, but not quite up to date. At the top of the document, it says: Drug monograph October, 1996 . For fully updated info, I like to look at the CLINICAL PHARMACOLOGY 2000 site: http://cp.gsm.com/ . The INTERACTIONS info for this drug - said to be "revised 7/13/00" - includes this interesting bit: "Antipsychotic agents may inhibit the clinical antiparkinsonian response to levodopa, pergolide, pramipexole, or ropinirole therapy by blocking dopamine receptors in the brain. In general, atypical antipsychotics are less likely to interfere with these therapies than traditional antipsychotic agents. Olanzapine should be avoided during therapy for Parkinson's disease unless the benefit of the olanzapine outweighs the risk of decreased therapeutic response to levodopa or other treatments." Ben Winter