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Narcolytic Metabolase is a type of drug used by the UNSC. It is an enzyme that, when injected into a person, consumes all analgesic agents in the patient's bloodstream, waking them up if they were sedated.

Dr. Halsey used this on Kelly-087 when they arrived at Onyx aboard the Beatrice.[1]

List of appearancesEdit


  1. Halo: Ghosts of Onyx, page 151