Antibiotics + DairyiStock/Thinkstock
Antibiotics in the quinolone family, such as Cipro and Levaquin, bind to calcium and iron, so avoid dairy and supplements containing iron—foods won’t contain enough iron to be a problem—when taking these medications, says Jeff McClusky, pharmacy supervisor with the Harris Health System in Houston, Texas, and American Pharmacy Association spokesman. By blocking the drugs’ absorption, these products could make the antibiotics ineffective, leaving your infection untreated. Make sure you always ask these 12 questions before taking antibiotics.
Blood Thinners + LettuceiStock/Thinkstock
Vitamin K, found in high amounts in such foods as kale, lettuce, broccoli, and chickpeas, could be a threat to those on the blood thinner warfarin. Fluctuations in your levels of vitamin K can inactivate warfarin, says Howard Weintraub, MD, clinical director of the New York University Center for the Prevention of Cardiovascular Disease. Try eating consistent amounts of vitamin K-containing foods each week; but always check with your doctors. Here are 10 more important questions to ask before filling a prescription.