Convulsion due to piperacillin sodium and tazobactam sodium

A 26-year-old male patient,who had undergone renal transplantation 4 years before and received hemodialysis in the past 5 months,was treated with an IV infusion of piperacillin sodium and tazobactam sodium 4.5 g in 0.9% sodium chloride 100 ml once daily for pulmonary infections.Five hours after the second infusion,the patient suddenly experienced convulsion,unconsciousness,upward deviation of the eyes,and twitching of legs.He was given IM diazepam 10 mg,followed by IV diazepam 7 mg,and then above-mentioned symptoms subsided.