The effect of jewel weed in preventing poison ivy dermatitis

Abstract

The treatment of poison ivy dermatitis with jewel weed (Impatiens biflora, Impatiens pallida) is a common folk remedy, which dates back to native American medicine. We designed a double blind, randomized and controlled clinical trial in human volunteers to test the effect of jewel weed juice in preventing poison ivy dermatitis. Twenty-five subjects were enrolled and had three areas on their forearms exposed to poison ivy leaves. The exposed areas received one of three applications: jewel weed juice, saline, or no agent. The subjects were assessed at 48, 72 and 96 h for severity of dermatitis and symptoms. No significant differences were found between the three categories in severity of dermatitis or degree of symptoms. With this model, it appears that jewel weed is not effective in preventing poison ivy dermatitis.