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ketamine hydrochloride injection, USP Drug Interactions


7.1 Theophylline or Aminophylline

Concomitant administration of Ketamine Hydrochloride Injection and theophylline or aminophylline may lower the seizure threshold. Consider using an alternative to Ketamine Hydrochloride Injection in patients receiving theophylline or aminophylline.

7.2 Sympathomimetics and Vasopressin

Sympathomimetics and vasopressin may enhance the sympathomimetic effects of ketamine. Closely monitor vital signs when Ketamine Hydrochloride Injection and sympathomimetics or vasopressin are co-administered and consider dose adjustment individualized to the patient's clinical situation.

7.3 Benzodiazepines, Opioid Analgesics, Or Other CNS Depressants

Concomitant use of ketamine with opioid analgesics, benzodiazepines, or other central nervous system (CNS) depressants, including alcohol, may result in profound sedation, respiratory depression, coma, and death [see Warnings and Precautions (5.8)].

Opioid analgesics administered concomitantly with Ketamine Hydrochloride Injection may prolong time to complete recovery from anesthesia.

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