The authors studied the effect of milk on the bioavailability of norfl
oxacin in six healthy male volunteers in a randomized crossover trial.
After an overnight fast, 200 mg of norfloxacin was given with 200 mt
of water or milk. Area under the curve (AUC) of norfloxacin with milk
was significantly (P < 0.01) smaller than that with water. The mean pe
ak serum concentration was decreased to 60% after oral administration
of norfloxacin with milk (P < 0.01). The apparent volume of distributi
on at central compartment (V-c/f) value of norfloxacin was significant
ly (P < 0.05) increased with milk. Milk exhibits a clinically signific
ant effect on norfloxacin absorption.