What medications help treat poison ivy?

Poison ivy: Poison ivy treatments are usually limited to self-care methods, and the rash typically goes away on its own within two to four weeks. In the meantime, you can use poison ivy remedies, such as oatmeal baths and cool compresses, as well as over-the-counter anti-itch medications to relieve your signs and symptoms. In severe cases topical and oral cortisone are needed.