Diseases and Disorders
- Olanzapine, for Alzheimer disease
- Oligodendroglioma
- Omacetaxine, for chronic leukemia
- Onabotulinum toxin A (Botox), for esophageal diverticula
- Opioid antagonist, for psychoactive substance abuse
- Oral ulcers, in lupus erythematosus
- Orimary intracranial tumors
- Oseltamivir (Tamiflu), for influenza
- Osteitis deformans
- Osteoarthritis (OA)
- Osteogenic sarcoma
- Osteomyelitis
- Osteopenia, in hyperparathyroidism
- Osteosarcoma
- Otitis media (OM)
- Ovarian cancer
- Oximetry, pulse, in laryngotracheobronchitis
- Oxybutynin chloride, for neurogenic bladder