Cefapirin
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![Cephapirin synthesis:[2] U.S. Patent 3,422,100 U.S. Patent 3,503,967 U.S. Patent 3,578,661](/Images/godic/202501/03/Cephapirin_synthesis.svg3817.png")
Cefapirin (INN, also spelled cephapirin) is an injectable, first-generation cephalosporin antibiotic. It is marketed under the trade name Cefadyl. Production for use in humans has been discontinued in the United States.
It also has a role in veterinary medicine as Metricure, an intrauterine preparation, and combined with prednisolone in Mastiplan, an intramammary preparation. Both are licensed in cattle.