US FDA

FD&C Act Section 503B - Outsourcing Facilities

Plain-language explanation, inspection context and common violation patterns.

What it says

An outsourcing facility is a compounding facility that registers with FDA and can supply compounded drugs, including sterile drugs, without individual patient prescriptions. In return it can be exempt from certain requirements, such as FDA approval of the drug and adequate directions for use. To qualify, it must compound under the supervision of a licensed pharmacist, comply with current good manufacturing practice, follow the rules on permitted ingredients, and meet labeling, adverse event reporting and product reporting requirements.

Paraphrased for plain-language clarity. Always verify against the current published regulation text.

What it means in practice

What FDA inspectors look for

Most common violation

Weak sterility assurance in the production of sterile compounded drugs, such as inadequate aseptic technique, incomplete environmental monitoring or insufficient investigation of contamination signals.

Related regulations

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