Evidence supporting the use of: Japanese camphor
For the health condition: Poison Ivy or Oak

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Synopsis

Source of validity: Traditional
Rating (out of 5): 2

Japanese camphor (Cinnamomum camphora) has a long history of traditional use in topical preparations for skin irritation and itching, including conditions like poison ivy and poison oak dermatitis. Its inclusion is primarily based on its counterirritant and mild local anesthetic properties, which have been recognized in various cultures, particularly in East Asia and later in Western over-the-counter remedies. Camphor provides a cooling sensation that can temporarily relieve itching and discomfort associated with allergic skin reactions, such as those from poison ivy or oak. Historically, camphor has often been combined with other substances, such as menthol or phenol, in liniments and ointments used to treat minor skin irritations.

Scientifically, there is limited direct evidence supporting camphor's efficacy specifically for poison ivy or oak dermatitis. Most available data pertain to its general antipruritic (anti-itch) and counterirritant effects. A few small studies and pharmacological reviews have noted that camphor can activate and then desensitize cutaneous sensory nerves, thus providing temporary symptom relief. However, camphor does not address the underlying allergic inflammation caused by urushiol exposure from poison ivy or oak. Modern clinical guidelines for poison ivy/oak generally do not emphasize camphor, but some over-the-counter anti-itch products still include it due to its long-standing traditional use and perceived soothing effects. Thus, its use for this condition is best characterized as traditional with modest supporting evidence for symptomatic relief only.

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