Thangavelu Lakshmi*1, Rajendran Ramasamy2 and Rathinam Thirumalaikumaran3 1Department of Pharmacology, Saveetha Dental College and Hospitals, Chennai, India. 2Department of R and D, Green Chem Herbal Extracts and Formulations, Bangalore, India. 3Department of Pharmacognosy, Faculty of Pharmacy, Sree Ramachandra Medical College and Research Institute, chennai, India.