A method of treatment of a condition selected from the group comprising
conjunctivitis, keratitis, `allergic eyes`, adenovirus infections, corneal
homograft rejection, anterior uveitis, nasal polyps, vasomotor rhinitis,
allergic manifestations of the nasopharynx, reversible obstructive airways
disease, Crohn's disease, distal colitis and proctitis, which method
comprises administration to a patient suffering from such a condition of a
therapeutically effective amount of an aqueous solution containing, as
active ingredient,
9-ethyl-6,9-dihydro-4,6-dioxo-10-propyl-4H-pyrano(3,2-g)quinoline-2,8-dica
rboxylic acid or a pharmaceutically acceptable salt thereof. Also described
are novel pharmaceutical compositions suitable for use in such methods of
treatment.
