Blitt C D, Petty W C
Anesth Analg. 1975 Sep-Oct;54(5):607-8. doi: 10.1213/00000539-197509000-00009.
Two adult patients suffered postoperative delirium following administration of lorazepam, a new benzodiazepine sedative. Physostigmine was found effective in reversing all untoward central nervous system effects.