Breaking these large molecules into smaller components involves: 1  movement: propels food through the digestive system. 2  secretion: release of digestive juices in response to a specific stimulus. 3  digestion: breakdown of food into molecular components small enough to cross the plasma membrane.
Over-the-counter pain relievers, like Advil (ibuprofen), Aleve (naproxen sodium) and Tylenol (acetaminophen), are presumed to be safe. Since they don't require a prescription, directions and warnings aren't always taken seriously.
Another thing to take into consideration is the actual amount of ibuprofen that reaches systemic circulation without being converted to an inactive metabolite. This is maximized in both the 800 mg tablet and Advil, while generic 200 mg doses may not actually deliver the full 200 mg amount.