THE WITHDRAWAL TIME-ESTIMATION OF VETERINARY DRUGS - A NONPARAMETRIC APPROACH

The study of a veterinary drug for use in a food producing animal requ ires the estimation of the withdrawal time which is defined as the tim e when it can be assessed with a controlled risk that a given percenta ge (less than 100(1-alpha)%) of animals have a concentration below the Maximal Limit of Residue (MRL), A simple and understandable non-param etric method which allows the control of the risk is presented, This m ethod does not require the assumptions needed for the correct use of t he current method of estimation to be met, A simple example which illu strates the use of this method is presented.