This question is based on an incorrect underlying assertion, namely that Jews are prohibited from taking Olanzipine. There is no Halakhic injunction against taking medicines that help stabilize a person's mental condition.
Yes u can i do im on 7.5ng olanzipine n sumtyms 10mg n 2 500mg co codamol it just makes you bit more sleepy which is good if you suffer insomnia too like me