Resolution usually occurs in 7 to 10 days in mild cases but may be up to 3 weeks or more in severe cases. The primary preventative measure is avoidance. While this is not always possible, preventing the urushiol from penetrating into the skin by washing off the plant oil within 10 to 30 minutes of exposure may reduce the risk of developing dermatitis. Treatment of the allergic contact dermatitis caused by exposure to poison ivy consists of pharmacological and non-pharmacological therapies. Pharmacological therapy pertains to the use of corticosteroids for treatment and anti-pruritics for symptomatic relief.
Corticosteroids are the mainstay of therapy and can be given topically or systemically.
Topical steroids are adequate in mild cases consisting of erythema, edema, and papules limited to localized regions. These ointments or creams are applied two to four times daily to nonfacial and nonintertriginous areas. Anti-pruritics are generally given for relief of itching associated with exposure to poison ivy. Allergic contact dermatitis caused by exposure to poison ivy is commonly encountered in the United States. References Poison ivy.