Dosing Errors With Cubist Antibiotic Prompt FDA Warning

The FDA has issued a warning to health care professionals about the risk for dosing errors with the antibacterial drug combination ceftolozane/tazobactam (Zerbaxa, Cubist) due to confusion about the drug strength displayed on the vial and carton labeling.

Zerbaxa is a combination product consisting of ceftolozane, a cephalosporin antibacterial drug, and tazobactam, an inhibitor of certain ß-lactamase enzymes. Zerbaxa’s vial label was approved initially with a strength that reflects each individual active ingredient (1 g/0.5 g); however, the product is dosed based on the sum of these ingredients (1.5 g).

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