Olanzapine is an antipsychotic medication typically used to treat schizophrenia, bipolar disorder, and other conditions. There are several synonyms for olanzapine, including Zyprexa, Olansek, and Zaroxolyn. These names refer to the same medication but may be marketed under different brands or in different countries. Olanzapine works by blocking certain neurotransmitters in the brain, which helps to reduce psychotic symptoms such as hallucinations, delusions, and disorganized thinking. Although olanzapine can be effective in treating these conditions, it can also cause side effects such as weight gain, drowsiness, and increased cholesterol levels. As with any medication, it's important to talk to a healthcare professional about the risks and benefits of using olanzapine.