I also use Walgreens and funny cause they seem to be the only ones that carry my meds and do not run out!!! My suggestion is to call them 3-5 days ahead of time to check that they will have what you need, I do this pretty reguarlly, and they seem to get the message. I specifically ask them to check their stock!! Hope this may help you. Also, another reason I use them is that when we travel there is always a Walgreens and they have my info, that is not to say that I may have to call around to find one where I am that have what I need in stock, but I have always been able to get my meds. Fondly0-Carol