Rhus toxicodendron is a homeopathic remedy often used to treat minor joint pain that is better from motion and worse in cold, damp conditions. It is also a remedy commonly used to treat poison ivy rashes. Other indications include great restlessness with any pain, lameness or stiffness on beginning to move, worse during sleep and rest, better warmth and change of position. The remedy Rhus toxicodendron is made from the plant known as poison ivy.