Thanks for posting your query.
Oleanz is olanzapine
which is an atypical antipsychotic
It causes drowsiness
, decreased cognitive function, edema feet, aloofness the symptoms are much like the disease for which it is used, i.e. the psychoses.
If your wife had been alert earlier then she is getting overdosed, cut down the dose by half and then observe and then weekly escalate the dose to get control of psychosis
Hope I have answered your query.
If you have any questions I will be happy to answer.
Please close the query if you have no other questions.
Wish you a good health.