CEFAZOLIN
According to the official FDA enforcement report:
Labeling: Label Mix-Up; cartons of Cefazolin for Injection, USP 1 gram were found to contain vials labeled as penicillin G potassium for Injection, USP, 20 million Unit. The vials contained Cefozalin
Cefazolin for Injection, USP, 1 gram per vial, Sterile, For Intramuscular or Intravenous Use, Rx Only, Manufactured by Sandoz GmbH for Sandoz Inc. Princeton, NJ 08540, NDC: 0781 3451-70 (vial), NDC: 0781-3451-96 (carton).
Nationwide in the USA
Official Source Provenance
Verified regulatory citation from U.S. FDA OpenFDA