Preparations catedgel and catedgel S made in Austria (Montavit) was tried in Moscow hospital N 50. Categel is a sterile gel of methylcellulose with 2% lidocain and 0.05% chlorhexidine, catedgel S contains the same components but lidocain. Categel significantly reduces the risk of infectious-inflammatory complications after endourological manipulations, improves endoscopic diagnosis and makes some manipulations less painful. Comparative pharmacological cost-effect assessment of categel S and glycerine effects in prostatic transurethral resection. Categel was found 2.11 times more effective. It also improves quality of life of the patients. Categel can be recommended for wide use in urology.