Laboratory animals and analgesia: the responsibility of ethics committees and the obligations of researchers

Abstract The aim of the present study was to evaluate projects submitted to an Animal Research Ethics Committee regarding the use of analgesia in experimental surgery. A total of 106 projects submitted to the Animal Research Ethics Committee were evaluated and the following information was collected: methodology of the surgical procedure, use of analgesia, justification of the non-use of analgesia and application of the degree of invasiveness. Of the projects evaluated, 64.2% used surgical techniques, of which 65.6% did not use analgesia postoperatively, with the main reason being that the analgesic could alter the results. In 17% of cases the classification of the degree of invasiveness was used in an irregular manner. The stimulation and dissemination of analgesia-related knowledge must stem from both the ethics committees responsible and researchers.