Milk and dairy foods
If taking an antibiotic called tetracycline (often prescribed for acne), you should avoid milk and dairy products. The calcium and magnesium in these foods combines with the drug, creating a compound that the body cannot break down, Absorption is prevented and the drug won't work properly.
Green Vegetables
If taking the blood thinning drug Warfarin, don't each too much broccoli, spinach or other green, leafy vegetables. They are rich in vitamin K, which counteracts the effect of the drug.
Good Housekeeping, February 2009
