#$%^&*AU2018286571B220200402.pdf#####ABSTRACT The present invention relates to a liquid pharmaceutical composition suitable for administration by inhalation which comprises a diluent and a suspension of particles of 9,10dimethoxy-2-(2,4,6-trimethylphenylimino)-3-(N-carbamoyl-2-aminoethyl)-3,4,6,7tetrahydro-2H-pyrimido[6,1-a]isoquinolin-4-one (RPL554) or a pharmaceutically acceptable salt thereof. Also described is a liquid pharmaceutical composition according to the invention for use in the treatment of the human or animal body.
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