Usual Adult Dose for Anesthesia:
IV:-Induction: 1 to 4.5 mg/kg IV; alternatively, 1 to 2 mg/kg IV at a rate of 0.5 mg/kg/min; (2 mg/kg dose provides 5 to 10 minutes of surgical anesthesia within 30 seconds)-Maintenance: The maintenance dose should be adjusted according to the patient's anesthetic needs and whether an additional anesthetic is employed.  Increments of one-half to the full induction dose may be repeated as needed for maintenance of anesthesia.IM:-Induction: 6.5 to 13 mg/kg IM; (9 to 13 mg/kg IM provides 12 to 25 minutes of surgical anesthesia)-Maintenance: The maintenance dose should be adjusted according to the patient's anesthetic needs and whether an additional anesthetic is employed.  Increments of one-half to the full induction dose may be repeated as needed for maintenance of anesthesia.Comments:-This drug should be administered slowly over a period of 60 seconds (more rapid administration may result in respiratory depression and enhanced pressor response).-The larger the total dose, the longer will be complete recovery.-Because of rapid induction following the initial IV injection, the patient should be in a supported position during administration.
Usual Pediatric Dose for Anesthesia:
16 years and older: See adult dosing
 Detailed Ketamine dosage information
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