According to federal regulations, what is the minimum time prescriptions for controlled substances should be retained on file?

Federal regulations require that prescriptions for controlled substances be retained on file for a minimum of two years. This retention period is essential for compliance with the Drug Enforcement Administration (DEA) regulations, which help ensure the integrity of the dispensing process and facilitate the monitoring of controlled substance use. Keeping records for at least two years allows for proper auditing of pharmacy practices and helps in the investigation of any potential misuse or diversion of these substances.

Prescriptions must be readily accessible for review by federal and state regulatory authorities, which reinforces the importance of this two-year requirement. Retaining the documents for a longer period than required may be good practice, but two years is the established federal standard for controlled substances.