[Tranquilizers in the transport of slaughtering pigs: a problem of residues?]

Selection of a meatier type of pig previously gave rise to problems during transport because of susceptibility to stress. A symptomatic approach of the problem resulted in administration of tranquilizers prior to transport. The properties of the tranquillizers azaperone and propiopromazine are discussed, as are the results of studies on residues. It is concluded that the residues detected so far are not detrimental to public health. In view of other possible approaches designed to prevent or reduce injury due to transport, the use of tranquillizers not strictly indicated is undesirable.