Olanzapine is a prescription medication used to treat schizophrenia. It is also used to treat bipolar disorder. Olanzapine belongs to a group of drugs called atypical antipsychotics, which work by altering the activity and levels of certain natural chemicals in the brain.

This medication comes in tablet form and in a dissolvable tablet. Olanzapine is taken once a day, with or without food.

Common side effects of olanzapine include lack of energy, dry mouth, increased appetite, and tremor (shakes).