The analgesic properties of the 1-allyl-4-hydroxy-6,7-dimethoxy-2-oxo-1,2-dihydroquinoline-3-carboxylic acid alkylamides 1a-x were studied in non-pedigree, white male rats using the method reported in detail by us before [3] for the standard electric current model of rectal mucosa stimulation [10]. Analysis of the screening results are given in Table 1 and conclusively confirm the correctness of our selection of this set. At a dose of 20 mg/kg and without exception all of the alkylamides 1a-x demonstrate analgesic activity to some extent. Moreover approximately one half of the studied samples are as active as Diclofenac. However, from all of the group, special mention must be made of one compound (the 2-hydroxyethylamide 1q) whose analgesic effect markedly exceeds not only diclofenac but also one of the most powerful nonnarcotic analgesics ketorolac [11, 12].