The length of time needed for drug residues present in the meat or milk to return to safe levels after drenching is printed on the label. After treatment an animal should not be slaughtered or milk taken for human consumption until the prescribed withholding period has elapsed. These are not available for all products but are being developed continuously. Trace element compatibility Selenium, cobalt and other trace elements can be mixed with some drenches as long as the mixture is well shaken and used on the day of mixing. Farmers should check with the manufacturer of each drench on compatibility before attempting such mixes.
Precautions Always read the label before using any drench.
Sheep that are exhausted, dehydrated or stressed should not be drenched until recovered. Some drenches can be poisonous if swallowed or may cause irritation to skin or eyes on contact. For emergencies, contact the Poisons Information Centre on 13 1126. Drenches should only be stored in their original container. Some chemicals break down in strong light, so any remaining drench in a clear plastic backpack should be returned to the drum.