Zyprexa (Olanzapine) 80/20 Summary

1. Mechanism & Profile Zyprexa is an atypical antipsychotic used for major psychiatric conditions. Its efficacy stems from dopamine (D1-D4) and serotonin (5-HT2A) receptor antagonism, modulating central activity to treat positive and negative schizophrenia symptoms. It binds 5-HT2C receptors (regulating food intake), explaining notable weight gain. Binding to muscarinic, histamine H-1, and alpha-1 receptors causes somnolence, orthostatic hypotension, and anticholinergic side effects.

2. Key Indications FDA-approved uses:

• Schizophrenia & Bipolar I: Monotherapy or maintenance for manic/mixed episodes.
• Bipolar/Treatment-Resistant Depression: Used jointly with fluoxetine.
• Acute  ...