Sn IRRITANTS AND COUNTERIRRITANTS 



America. It has a smoky vanilla like odor, and bitter persistent 

 taste. It is soluble in alcohol, chloroform, and glacial acetic acid. 

 It contains resins, cinnamic and benzoic acids and traces of vanillin. 



Doses. T). rtiv — ^xxx; 0.3 — 2. 



Uses. Expectorant and parasiticide. In the earlier days of 

 medicine, it was used as a stimulating expectorant, but has been re- 

 placed by better drugs. It is useful externally as a stimulant to 

 indolent wounds and in mange. For the latter purpose it may be 

 used alone or with equal parts of alcohol, or in combination with 

 sulphur in an ointment as 



R Sulphuris Prsecipitati. 



Balsami Peruviani aa. 3 ij 



Olei Olivee 3 j 



Adipis, q. s ad. 3 ij 



M. Ft. Ung. 



Use as directed. 



OTHER COUNTERIRRITANTS 



Ammonia. This is an active counterirritant, especially if well 

 rubbed into the parts or if the gas is confined. It is useful in lini- 

 ments for sprains, bruises, swelling of the tendons, etc. It is one of 

 the principal ingTedients of veterinary liniments. 



Oil of Turpentine. See the turpentine group of volatile oils. 

 This is particularly serviceable as a turpentine stupe in the various 

 inflammations of internal organs. Turpentine is one of the most 

 useful counterirritants we possess. Combined with ammonia it is 

 frequently employed as a liniment. 



Capsicum. This is occasionally used as a counterirritant. Its 

 action is not so strong as that of cantharides, and causes more pain 

 than mustard. It may be used in some cases where a vesicant action 

 is not desired, but where mild stimulation is indicated. 



Iodine. This is well adapted for those conditions which require 

 a mild but persistent action. The tinctiire is of service in laryn- 

 gitis, arthritis, synovitis, etc. The action is persistent and renders 

 the drug peculiarly adapted for the absorption of exudates. Prep- 

 arations stronger than the tincture are frequently beneficial in exos- 

 tosis. The following often proves serviceable in spavins, splints, etc. 



Absorbent solution. 



5 Hydrargjrri Chloridi Corrosivi grs. ij 



lodi 3 j 



Ichthyolis 5 j 



Glycerini 3 j 



Alcoholis q. s ad. S j 



M. et ft. solutio. 



Sig. Apply every other day with a brush. 



