Each vial contains sterile piperacillin sodium equivalent to piperacillin 4 g and sterile tazobactam sodium equivalent to tazobactam 500 mg.
Each vial of piperacillin/tazobactam reformulation contains a total of 2.79 mEq (64 mg) of sodium per gram of piperacillin.
Tazocin also contains edetate disodium dihydrate (EDTA) 1 mg/vial. It contains no preservatives.
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