Counter Irritant

Counter-irritants are Irritants that, when applied to the skin are used to produce reflex influence on remote parts. [Culbreth1927, pg 46].

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  Immune System
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  Integumentary System

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  Garlic (Allium sativum)
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  Turmeric (Curcuma longa)

[Culbreth1927] David Marvel Reynolds Culbreth. A Manual of Materia Medica and Pharmacology, Seventh Edition. Philadelphia, PA: Lea & Febiger (1927). Online Reprint.