Abstract
The analgesic activity and side effects of arylacetamide derivative GR 89,696 have been studied. It has been shown that the occurrence of analgesic effect is accompanied by a change in the ratio between pain and alternative patterns of behavior, while the decrease in the severity of normal behavior is observed only after the introduction of the sample at a maximum analgesic dose of 2000 |ig/kg. The consistent developments of fading, adynamia, weakening of the flip reflex, a significant increase in diuresis are the side effects of intramuscular administration of the sample in the dose range of 1-100 |ig/kg. Negative influence of the sample on respiratory and cardiovascular functions of animals has not been revealed. Therapeutic index (more than 2900) and safety factor (less than 0.02) calculated on the basis of the obtained data allow to consider GR 89,696 as a potential anesthetic, however, to establish the possibility of its practical use a more detailed study of the side effects of the compound is necessary.