TYPE OF TEST : LD50 - Lethal dose, 50 percent kill ROUTE OF EXPOSURE : Intravenous SPECIES OBSERVED : Rodent - mouse DOSE/DURATION : 18 mg/kg TOXIC EFFECTS : Behavioral - somnolence (general depressed activity) Behavioral - tremor Behavioral - muscle contraction or spasticity REFERENCE : NTIS** National Technical Information Service. (Springfield, VA 22161) Formerly U.S. Clearinghouse for Scientific & Technical Information. Volume(issue)/page/year: AD414-509