Disclosed herein are urushiol-containing epicutaneous patches comprising a support material and a urushiol-containing film on a surface of the support material. A surface of the support material is coated with the urushiol-containing film. Also described herein are test panels comprising urushiol-containing epicutaneous patches of varying urushiol content. The test panels can be employed in methods to assess subject sensitivity to urushiol, to determine a dose-response relationship to varying doses of urushiol, and to assess efficacy of treatments to prevent or inhibit urushiol-induced contact dermatitis in a subject.