Aconite liniment

Ext, Aconitl Fuldum (fluldextract of aconite root) Used In treating rheumatism, gout, and neuralgia. Also used as a basis for other aconite preparations (abstracts, plasters, extracts, liniments, etc.)... 

Liniment of Aconite, B.P,C, A 1 2 percolate of the root in 90 per cent alcohol, containing 3 per cent of camphor. 

Liniment of Aconite may be made with industrial methylated spirit, and hence aldehydes present in the alcohol will be precipitated in the assay. An approximate allowance can be made for this Hampshire and Page in a control experiment on industrial spirit with these proportions obtained a precipitate equivalent to 0 12 per cent of camphor. 

Liniment of Aconite, Belladonna and Chloroform, 5.P.C. (A.B.C. Liniment). Equal parts of the liniments of aconite, belladonna and chloroform, the latter consisting of equal parts of chloroform and camphorated oil. 

Chloroform is determined on 5 ml of a 10 per cent dilution in ethanol by the volumetric method described on p. 168 also the colorimetric method of Moffit (see Chloroform) has been tried successfully. Camphor is determined by following the method given under Liniment of Aconite. 

Instead of using aldehyde-free ethanol for dilution and in view of the fact that many galenicals containing camphor are made with industrial methylated spirit, this form of ethanol may be used for dilution so long as a control experiment is carried out with the same amount of ethanol. A determination on a liniment of aconite made with industrial methylated spirit and no camphor gave a precipitate equivalent to 0 12 per cent w/v of camphor but many industrial spirits contain less aldehyde, especially those purified for analytical use, one sample only showing aldehyde equivalent to 0 022 per cent of camphor. 

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