503A pharmacy
Where a compounded drug parts company with an FDA-approved one, where 503A parts company with 503B, and which accreditation programs tell them apart.
Definition
A state-licensed compounding pharmacy making preparations for named individual patients against a prescription. Held to USP <797> for sterile work, but its finished products are not FDA pre-approved. ⚠ If a seller will not name the 503A filling your vial, you cannot check its inspection history — and that is the single most common gap in this register.
PCAB accreditation investigation →
GLP Watchdog writes these definitions from FDA labels and peer-reviewed PubMed literature. Not one of them is an AI-generated summary.
Other terms under Pharmacy and drug forms
Where the evidence lives
- PCAB accreditation investigation
- The full GLP-1 glossary (149 terms, 8 categories)
- Research articles — written from primary sources
- Tools and calculators
- Compare GLP-1 telehealth providers