It's also used to treat depression when used with other medications. Zyprexa is part of a class of drugs known as atypical antipsychotics, which work to help restore the balance of dopamine, a natural substances in your brain known as a neurotransmitter.By taking this drug you may be able to decrease hallucinations, reduce feelings of agitation, and think more clearly and positively.yprexa is part of a class of drugs known as atypical antipsychotics, which work to help restore the balance of dopamine, a natural substances in your brain known as a neurotransmitter. By taking this drug you may be able to decrease hallucinations, reduce feelings of agitation, and think more clearly and positively.