The availability and legality of certain medications marketed for use in fish, specifically those manufactured by Thomas Labs and similar companies, have undergone significant changes. These products, often antibiotics, were previously accessible over-the-counter for treating bacterial infections in aquarium and pond fish. These medications were typically identical in formulation to human or veterinary antibiotics but were marketed for aquatic use to circumvent prescription requirements.
The widespread availability of these medications raised concerns among regulatory bodies, particularly the Food and Drug Administration (FDA), due to their potential contribution to antibiotic resistance. The unregulated use of antibiotics in any environment, including aquariums, can lead to the development of resistant strains of bacteria, which poses a threat to both animal and human health. Prior to changes, access was easily gained through online retailers and pet stores, presenting a challenge to responsible antibiotic stewardship.
