NCIt definition : Solid preparation consisting of one or more powders of solid active substance(s) intended
for generation of vapor to be inhaled to obtain a local effect. The vapor is usually
generated by adding the powder to hot water.;
Alternative definition : EDQM-HC: Solid preparation consisting of one or more powders of solid active substance(s)
intended for generation of vapour to be inhaled to obtain a local effect. The vapour
is usually generated by adding the powder to hot water.;