Present proposals for liquid-medium carriers for glass particles comprising pharmaceutical compositions have had problems associated with aggregation of the glass particles. This has been previously solved by matching the density of the particles and a liquid in which they are suspended. However, though this greatly constrains the choice of liquid carrier that can be used. An alternative solution to this problem has been found. By adding just a small amount of liquid (2) to the particles (1), a flowable mixture is formed of a creamy or paste-like consistency. Providing too much liquid (2) is not present, the particles (1) do not separate out and so the choice of liquid carriers available for use in compositions of this type is greatly increased.