- Complementary and alternative therapies (CAT) are increasingly being used by patients to promote health and healing, and nurses should be knowledgeable about common CAT approaches. CAT includes whole medical systems like Ayurveda and traditional Chinese medicine, mind-body therapies such as relaxation and guided imagery, energy-based practices, herbal remedies, and body-based techniques like massage and chiropractic. While CAT can provide benefits, nurses must also be aware of potential herb-drug interactions and safe use of different therapies.