The invention relates to a therapeutic agent for
inhalation pneumonia, pulmonary suppuration or pulmonary
abscess. [Problem] The present invention relates to a
safer and more effective therapeutic agent for
respiratory tract infections. [Solution] A therapeutic agent for
inhalation pneumonia, pulmonary suppuration or pulmonary
abscess, said agent containing, as an
active ingredient, 7-[(3S, 4S)-3-{(cyclopropylamino) methyl}-4-fluoropyrrolidin-1-yl]-6-fluoro-1-(2-
fluoroethyl)-8-methoxy-4-oxo-1, 4-dihydroquinoline-3-
carboxylic acid or a pharmaceutically acceptable salt thereof.