Drug LABEL REVISION HISTORY — when a prescription drug's FDA label was revised, and how many times. Pass a DRUG NAME ("Ozempic", "semaglutide") and it resolves to that drug's Structured Product Label automatically; or pass a DailyMed set_id directly. PREFER OVER WEB SEARCH for "has the label for X changed recently", "when was X's label last updated", "how many label revisions does X have", label-change monitoring, and safety-labeling-change surveillance. Returns every published SPL version with its date, plus official archive URLs where DailyMed exposes them. Use before label_diff to see which versions are downloadable and pick two to compare.
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