Shorts: Compounding Basics: Beyond-Use Dating and Why It Matters
A vial can look perfect — clear solution, no particles, intact glass — and still be unsafe to use. Contamination doesn't announce itself. This short covers what a beyond-use date actually is and why it isn't an expiration date, how USP <795> and <797> set default limits, and why the environment where you compound drives how long a preparation lasts. Plus the vial clocks technicians manage daily, and a five-step check to run before every use.
The skinny
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