A group of chemicals that have proved to be frequent causes of allergic contact dermatitis from applied ingredients of the vehicle. Fisher (1971) testing with a vehicle tray of 15 chemicals in 100 patients with allergic contact dermatitis due to topically administered medications found 30 positive patch test reactions of patients and reported that most important sensitizing chemicals are Ethylenediamine, Lanolin, Parabens, Phenylmercuric acid, and propylene glycol monostearate. These chemicals have been recognized as such common sensitizers that they are nonincluded in the standard patch test series by many countries. From the standpoint of allergenicity of topical preparations including topical medicaments and cosmetics, prevention and diagnostic procedures of dermatitis should be investigated extensively through the patch test studies. But, in our country, there has only a few investigation concerning the dermatitis from vehicle, particularly the medicaments-and cosmetics.
Therefore, author has tried to establish the vehicle tray fitted to our country according to the basic consideration used with the vehicle patch test tray of Fisher.
100 patients suspected of having allergic contct dermatitis due to topical medication or cosmetics were patch tested with a group of chemicals composed of substances commonly found in vehicles of current topical medications or cosmetics. There were many significant reactions to Ethylenediamine, Paraben, Lanolin, Sodium lauryl sulfate, Polyethylene glycol and Turpentine which play a signifi-cant role as solubilzer, antioxidants, emulsifiers, exirpients, preservatives, stabilizers, and surfactants.
Author proposed that a group of chemicals should be patch tested on patients of´ allergic contact dermatitis for the establishment and development of the hypoallergenic topical medicaments or cosmetics.
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