Polypseudomorphine is a sedative used by the UNSC. It is found in many, if not all, of the Health kits that are used on UNSC ships and facilities. Enough polypseudomorphine can knock out an ODST for the better part of a day. The drug is usually used for battlefield triage, but some ONI special forces teams also use it to knock out suspects so they can be captured. For example, the Spartan-II Blue Team used it to sedate Colonel Robert Watts so he could be brought back to ONI for interrogation.