A. Place the wastage into the toilet: Controlled substances must never be discarded independently into the toilet or sink due to diversion risk and regulatory violations. Proper disposal requires adherence to institutional policy, which includes witnessed wasting and documentation. Unwitnessed disposal compromises accountability and legal compliance. B. Complete a count of the medication after preparing Mr. Brown's medication: Narcotic counts are not performed after each individual administration. Counts are conducted at designated times, most commonly at shift change or when custody of the controlled substance storage changes. Performing an isolated count after one administration does not meet regulatory standards. C. Ensure a narcotic count is completed whenever there is staff shift change: Controlled substances such as Tylenol #3 (acetaminophen with codeine) require strict inventory reconciliation. A narcotic count at every shift change ensures continuity of accountability, detects discrepancies early, and complies with legal and institutional controlled substance regulations. D. Ensure a colleague signs the narcotic record, after telling them you have wasted 1/2 of the pill: While wasting controlled substances requires a witness, the colleague must directly observe the wastage before signing the narcotic record. Signing based solely on verbal reporting violates medication safety standards and controlled substance handling policies.