Pregna-1,4-diene-3,20-dione, 21-(acetyloxy)-9-fluoro-11,17-dihydroxy-16-methyl-, (11beta,16alpha)-, mixt. with O-2,6-diamino-2,6-dideoxy-alpha-D-glucopyranosyl-(1->4)-O-(O-2,3-diamino-2,6-dideoxy-beta-L-idopyranosyl-(1->3)-beta-D-ribofuranosyl-(1->5))-2-deoxy-D-streptamine sulfate and polymyxin B sulfate