Human: How can I get rid of a rash caused by poison ivy? Assistant: 
The best way to treat poison ivy is to wash the affected area with soap and water as soon as possible. You should also avoid touching or scratching the rash, since this will only spread it further. If you have already come into contact with poison ivy, you may want to use over-the-counter antihistamines such as Benadryl to help reduce inflammation. In severe cases, your doctor may prescribe an oral corticosteroid cream or ointment to help relieve symptoms.