Good to know for an emergency but when it comes to my dog surviving the lyme relapse, I would rather stick with meds from local Rx. Not to sure about internet doxy? Same thing but how old, is it kept in a cool dry place? Or in a 120 degree storage trailer. All things to consider. I just called my vet, he called it in, $12 for 20tabs aint bad I thought. Just sayin'