Just be careful with that stuff. The difference between the antibiotics given to your fish and the ones that come from the pharmacy is the FDA regulations around manufacturing. There's no Good Manufacturing Practices (GMP) required for the antibiotics provided for fish because they are not for human consumption. Sure, it may be the exact same pill manufactured in the exact same building, but the humans get pile A because that went through extensive QC and has passed, and the fish get pile B with rejects.
Obviously this isn't a truly factual scenario, but I would just be cautious consuming that unless you have no other option.