If you are taking this drug before a scheduled surgery to prevent infection and you miss a dose, take it as soon as you remember. If it is near the time of the next dose, keep taking your dosing schedule as directed and ask your doctor or pharmacist right away for a new dosing schedule. Do not double the dose to catch up.

If you are taking this drug to treat hepatic encephalopathy and you miss a dose, take it as soon as you remember. If it is near the time of the next dose, skip the missed dose. Take your next dose at the regular time. Do not double the dose to catch up.