Background: The health care system is changing incrementally and becoming more complex. As a result, many consumers seeking to take more responsibility for their health are turning to complementary and alternative therapies. The increased number of health care consumers choosing complementary therapies to augment treatment regimens and enhance health makes it imperative that the nurses become informed of these therapies and their utilization in the nursing practice.  Objectives: A study was conducted to assess the knowledge of nurses on complementary therapies to evaluate the effectiveness of educational intervention on complementary therapies among nursing professionals, and to find out association of knowledge with their socio demographic characteristics.  Material and Methods: Hundred nursing professionals above 20 years of age were studied. They were assessed for the level of knowledge on complementary therapies before the education/training, followed by the educational intervention carried out in relation to Therapeutic Yoga, Progressive Muscle Relaxation Therapy and Massage. The post test was carried out after the intervention by using structured questionnaire. The data were analyzed with descriptive and inferential statistics wherever required. Results: The results revealed that there was an improvement in the knowledge on complementary therapies (pre test mean score 8.79±2.12 and post test score was 16.19±2.65) with effectiveness of 37.05% was statistically significant (t=11.39, p<0.05). Nurses exhibited a positive attitude and valued the significance of complementary therapies. The knowledge had significant association with socio demographic variables like age, education and occupation. Conclusion: The educational intervention/training was useful in improving knowledge and enhancing the attitude on complementary therapies in nursing practice. It is essential to raise the awareness on significance of complementary therapies in health care practice and seek behavioral change among health care professionals to improve the health care services. 

Keywords: Educational intervention; Complementary therapies; Nursing professionals.