Patient Money WHEN I stock up on ibuprofen (my painkiller of choice), I typically buy a 500-count bottle of a store brand like Kirkland or Rite Aid. After all, ibuprofen is ibuprofen. Each pill costs me about 3 cents — or only one-third the cost of 9-cent Advil. Yet, when it comes to vitamins — which I take only when I feel run down — I turn to name brands like Centrum or Nature Made. My thinking has been: Why mess around with quality when it comes to the essential ABCs? But now that I’ve done some research, I might...