One way to use Larrea tridentata is in various preparations to help prevent and kill a number of infectious organisms. These include; bacteria, fungi and protozoa. Chaparral has potent and long-lasting anti-inflammatory and analgesic effects in the treatment of rheumatoid arthritis. Chaparel is one of the medicinal plants of the Southwest,(along with osha Ligusticum porteri and jojoba Simmondsia chinensis) with a long history of medicinal use. Chaparral herb should only be used externally in baths, and the tincture can be used to make creams and lotions. Applied to the skin, chaparral can have a remarkable healing effect on the skin. It is useful for eczema, psoriasis, and as an excellent antiseptic dressing for cuts, sores, and bruises.