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AgVetLink: Number 59, December 2006

Carbadox: Change in Conditions

Internationally there has been concern over the need for additional residue information for this compound because the parent compound and some metabolites are recognised as carcinogens.

A review of the withholding period and registration conditions for the single product registered in New Zealand has resulted in a change in the meat withholding period for pigs from 28 days to 35 days and a move to prescription PAR I status. The revised withholding period has been based on information that a 35 day period is the longest withholding period that can be applied in normal practice.

Products containing carbadox will have a condition restricting use in food-producing animals except pigs because residue information has not been assessed for other species. This also manages the risk to trade to countries that have banned the use in food-producing animals.

Information on the sales of carbadox will be collected annually and included in the report of prescription antimicrobials.