21 CFR 610.53 - Dating Periods for Biological Products

What it says

Biological products must bear a dating period after which they may not be distributed or used, established and supported by stability data appropriate to the product and its storage conditions, with the dating period representing the time during which the product can be expected to retain its required potency, purity and other quality attributes.

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

What it means in practice

• This provision is the biologics counterpart to conventional drug expiration dating requirements, but biologics stability programs often need to account for greater product complexity and sensitivity to storage conditions than small-molecule drugs.
• Dating periods established under this provision must be directly supported by actual stability data, not assumed by analogy to a similar product, since even products within the same general class can have meaningfully different stability profiles.
• A storage condition excursion that calls a product's stability into question connects directly back to whether the dating period assigned under this provision remains valid for that specific affected lot.

What FDA inspectors look for

• Whether the dating period assigned to a biological product is directly supported by stability data specific to that product, not inferred from a similar product.
• Whether storage condition excursions are evaluated for their potential impact on whether the assigned dating period remains valid for the affected lot.
• Whether dating periods are reassessed when manufacturing process or formulation changes are made that could plausibly affect product stability.

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