Symptoms: There have been post-marketing reports of overdose with piperacillin/tazobactam. The majority of the adverse events experienced including nausea, vomiting, and diarrhea have also been reported with the usual recommended dosages. Patients may experience neuromuscular excitability or convulsions if higher than recommended doses are given intravenously (particularly in the presence of renal failure).
Treatment: Treatment should be supportive and symptomatic according to the patient's clinical presentation.
No specific antidote is known. Excessive serum concentrations of either piperacillin or tazobactam may be reduced by hemodialysis (see Pharmacology: Pharmacokinetics under Actions).