there are tw ways to dose cephalosporins in PD patients. The continuous dosing schedule involves adding cephalosporins in each bag – whether the patient is on CAPD or APD. The way to do this continuous dosing is 500 mg/L in the first bag nd 125 mg/L since then. Many units, however, use intermittent dosing. In this case, 1 gm is added to one bag during a 24-hour period. You want the antibiotic to dwell for at least 6 hours. For APD patients, it is best to dwell it in the day dwell – in patients who do a mid-dayexchange, that is the exchange to use the antibiotic. For the CAPD patients, it is best to add antibiotic in the overnight dwell.