When it comes to controlled substances, veterinary practitioners need to follow the most rigid rules. Compare the federal state regulations, pharmacy board and veterinary boards-controlled substance regulations or veterinary DEA regulation. You must follow the one that applies to your practice but meeting the stricter requirement will keep you in the safe book of the regulators. Home veterinarians must have a DEA license if dealing and dispensing controlled substances. They can have one registration if they only prescribe drugs in one state or different locations within the state. But if they store and dispense controlled substances in different locations within one state, they must have different DEA licenses. If they practice in different states, then they must have multiple DEA licenses along with state licenses, name of the animal and owner. Veterinary DEA regulations The license allows DEA veterinarians to transport, administer, and dispense controlled substances to unregistered ...