This study presents a new method for simultaneous determination of fenoterol, procaterol, clenbuterol, terbutaline and isoprenaline drugs using thin-layer chromatog. assisted by image anal. (HPTLC-IA) combined with sensitive detection modes.Separation of the selected drugs was obtained using HPTLC Silica gel 60 F254 plates and mixture of iso-Pr alc., Et acetate and ammonia (20:25:1.5 volume/volume/v) as mobile phase.UV detection mode combined with the use of 2,2-diphenyl-1-picrylhydrazyl (DPPH.) and 2,2-azino-bis (3-ethylbenzothiazoline)-6-sulfonic acid (ABTS+bul) radicals were applied for the first time for sensible detection of the separated drugs.Gray, green, red and blue scales resp. were selected for image anal. and accurate quantification of spot area.According to the obtained result, the use of DPPH. and ABTS+bul reagents revealed a higher sensitivity in detection and accurate quantification of the analyzed drugs.Lower limit of detection (LOD = 0.07 ± 0.03μg/spot; 0.09 ± 0.03μg/spot and 0.10 ± 0.04μg/spot) was obtained for fenoterol, procaterol and terbutaline using the ABTS+bul radical and red scale selection for image processing.With the exception of isoprenaline, the proposed HPTLC-IA method showed a good separation of fenoterol, procaterol, clenbuterol and terbutaline drugs from other compounds in urine samples.Good recovery was obtained for these drugs in spiked urine samples.