Anthony Florian Madinger Willich, Domestic Encyclopædia (1802)
“ ANTISPASMODICS are those medicines, which are calculated to relieve persons afflicted with cramps, spasms, or convulsions: such are opium, Peruvian balsam, and the essential oils of different vegetables. The most speedy antispasmodic, with respect to its immediate effects, is doubtless the juice of the poppy; but the Peruvian balsam produces more permanent benefit, and has frequently been of eminent service, after opium had failed to afford any relief. Essential oils act principally on some particular part, rather than on the system in general ”
