My husband is a pharmacist
My husband is a pharmacist and the brand we have bought to keep on hand is exactly the same thing that he puts in patient's pill bottles. Same pills, same company, same manufacture line. He cross checks the pill markings and lot numbers. They are exactly the same. Laws in this country do not allow pills to carry the same 'mark' as another pill, so if it's marked with the human brand, it's the same pill. They just sell them to vet supply companies for animal use as well. The only thing you need to know is the dosage for an adult versus a child etc, and what kinds of infections they are used for. Amoxicillin won't treat all bacterial infections, for instance. We have stockpiled Amoxicillin, Ciproflaxin, and Sulfamethoxaole/Trimethoprim (comes as a combo). Additionally, antibiotics have a much longer shelf life than drug manufacturers will advertise. A study, (Which has not been widely publicized for obvious reasons), found that ten year old antibiotics in sealed and properly stored conditions were still effective at 10 years past their manufacture date. If you hunt for the study you can find it.