H. Jung et al., THE INFLUENCE OF COFFEE WITH MILK AND TEA WITH MILK ON THE BIOAVAILABILITY OF TETRACYCLINE, Biopharmaceutics & drug disposition, 18(5), 1997, pp. 459-463
The effect of milk added to coffee or black tea on the bioavailability
of tetracycline was evaluated in 12 healthy volunteers according to a
crossover design. Results showed that even a small volume of milk con
taining extremely small amounts of calcium severely impair the absorpt
ion of the drug, so that the presence of this metal ion should be care
fully controlled in order to avoid decreasing the available tetracycli
ne. (C) 1997 by John Wiley & Sons, Ltd.