There is described a method for the treatment of psychiatric conditions which method comprises inhalation administration of 1,3-bis(2-carboxychromon-5-yloxy)-2-hydroxy propane, or a pharmaceutically acceptable salt thereof (as active ingredient), to a patient suffering, or liable to suffer, from such a condition.
Pyrethroid type insecticides are described having the formula: ##STR1## Compounds of general formula I are endowed with a high insecticide and acaricide activity.
