Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Oculogyric crisis (OGC) is the name of a dystonic reaction to certain drugs and/or medical conditions. The term "Oculogyric" refers to rotating of eyeballs, but several other responses are associated with the crisis. Drugs that can trigger an oculogyric crisis include neuroleptics (such as olanzapine), amantadine, benzodiazepines, carbamazepine, chloroquine, cisplatin, diazoxide, influenza vaccine, levodopa, lithium, metoclopramide, domperidone, nifedipine, pemoline, phencyclidine, reserpine, and tricyclics. Other causes can include postencephalitic Parkinson''s, Tourette''s syndrome, multiple sclerosis, neurosyphilis, head trauma, bilateral thalamic infarction, lesions of the fourth ventricle, cystic glioma of the third ventricle, herpes encephalitis, and juvenile Parkinson''s.