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503a Bulks List

Meaning

The 503a Bulks List is a critical regulatory compendium, maintained by the U.S. Food and Drug Administration, specifying bulk drug substances that may be legitimately used by traditional compounding pharmacies to prepare patient-specific medications. This list ensures that raw materials utilized in customized hormonal formulations possess established clinical utility and appropriate safety profiles. Clinicians must reference this designation to confirm the pharmaceutical integrity of custom-formulated hormonal therapies, such as bioidentical hormone replacement products. The list is essential for balancing patient access to individualized medicine with necessary governmental oversight.