This document provides instructions for patient-controlled analgesia (PCA) medication administration and documentation. It lists common PCA medications and outlines requirements for verifying PCA syringe counts at shift changes and documenting amounts. It also describes PCA settings like the 4-hour medication limit and lockout time between doses. Procedures are provided for charting PCA medication as effective or ineffective, discontinuing orders, loading new syringes, and changing PCA medications.