Interfering with how the medicine is digested and absorbed by the body. For example, milk blocks iron absorption in the stomach. Other foods, containing higher levels of fat and fiber, slow down the rate at which your stomach empties and the rate at which your medication is absorbed by your body.
For carry-on bags, all liquid toiletries, such as toothpaste and lotion, must be in bottles or packages clearly labeled as containing 3.4 ounces (100 ml) or less of liquid, according to the TSA. Non-liquid toiletries do not have an individual size limitation if they fit inside a carry-on bag.
But before you go decanting all your toiletries into 100ml bottles, though, beware. 3 ounces (or 3.4 ounces/100ml) is a really large bottle in the world of travel-sized toiletries. Unless you have an obsessive need to lotion your hands every 30 minutes, chances are you will not need such a large bottle.