1. Cerebellar disease
2. Drugs, including the following:
 

acetophenazine alprazolam alseroxylon amantadine amitriptyline amodiaquine butaperazine carbamazepine carphenazine chlordiazepoxide chloroquine chlorpromazine chlorprothixene cisplatin clonazepam clorazepate deserpidine desipramine diazepam diethazine doxepin droperidol ethopropazine fluphenazine

flurazepam halazepam haloperidol hydroxychloroquine imipramine influenza virus vaccine levodopa lithium carbonate lorazepam loxapine mesoridazine methdilazine methotrimeprazine metoclopramide metronidazole midazolam nitrazepam nortriptyline oxazepam pemoline pentazocine perazine pericyazine perphenazine

phencyclidine pimozide piperacetazine prazepam prochlorperazine promazine promethazine propiomazine protriptyline rauwolfia serpentina rescinnamine reserpine syrosingopine temazepam thiethylperazine thiopropazate thioproperazine thioridazine thiothixene triazolam trifluoperazine trifluperidol triflupromazine trimeprazine

3. Late manifestations of encephalitis
4. Lesions of fourth ventricle and cerebellum, especially lesions of the flocculus
5. Multiple sclerosis (disseminated sclerosis)
6. Parkinsonism syndrome (shaking palsy)
7. Syphilis (acquired lues)
8. Trauma

Burstein AH, Fullerton T. Oculogyric crisis possibly related to pentazocine. Ann Pharmacotherapy 1993; 27:874-876.

Fraunfelder FT, Fraunfelder FW. Drug-induced ocular side effects. Woburn, MA: Butterworth-Heinemann, 2001.