You can buy hcg drops at Walmart. They offer a lot such as Creative Bioscience 1234, Nexgen HCG Diet Drops etc. These two drops are considered best you can get in stores. Take a walk through GNC as well, they too have loads of hcg drops just make sure that it has good amount of hcg content.
You can also ask the salesperson which is more of selling product…just to get an idea.