a double-blind comparative study of the use of garamycine ( gentamicin ) ear drops and tsp ( trimethroprim-sulphacetamide-polomyxin b ) ear drops in the treatment of 100 cases of otorrhoea due to external otitis , a recurrent otitis media accompanied by perforation of the drum , an infection of the mastoid cavity or a postoperative infection , provided evidence of the effectiveness of both medications .
C1154187
ear drops
C0991568
drops