This report represents the conclusions of a Joint FAO/WHO Expert Committee convened to evaluate the safety of residues of certain veterinary drugs in food and to recommend maximum levels for such residues in food. The first part of the report considers general principles regarding the evaluation of residues of veterinary drugs within the terms of reference of the Joint FAO/WHO Expert Committee on Food Additives (JECFA), including extrapolation of maximum residue limits (MRLs) to minor species, MRLs for veterinary drug residues in honey, MRLs relating to fish and fish species, dietary exposure assessment methodologies, the decision-tree approach to the evaluation of residues of veterinary drugs and guidance for JECFA experts. Summaries follow of the Committee's evaluations of toxicological and residue data on a variety of veterinary drugs: two anthelminthic agents (derquantel, monepantel), three antiparasitic agents (emamectin benzoate, ivermectin, lasalocid sodium), one antibacterial, antifungal and anthelminthic agent (gentian violet) and two production aids (recombinant bovine somatotropins, zilpaterol hydrochloride). Annexed to the report is a summary of the Committee's recommendations on these drugs, including acceptable daily intakes (ADIs) and proposed MRLs.