You might have heard about the TRICARE pharmacy shake-up that is coming December 1. Here are the basics: starting on that date, TRICARE users will no longer be able to hit up CVS pharmacies, including those located in Target, for their covered prescriptions. But they will be able to visit a pharmacy that's been off the table since 2011: Walgreens. The reason? Contract renegotiations. But in case you don't really care about that stuff and just want to know exactly how this is going to impact you, here's the quick and dirty.