I needed a prescription for Biaxin, and yes I know I can get it generic, but I do not want generic drugs that come from foreign countries where you don't know what you get... plus my doctor agrees with me to stick with brand names. I went to my local drug store and the brand biaxin was ridiculously expensive. I used goodrx and found that CVS.com had it for 50% less. Obviously I can trust cvs and so I saved myself considerable money. What goodrx.com is useful for is figuring out which drugstore carries the prescription for the least amount of money. Sure you could call all of them but that would take forever. It is so easy to save money.