3Dr. Harbir Kaur Rao, *1Dr. Kavita Sekhri, 2Dr. Rani Walia,, 1MD (Pharmacology), Assistant Professor, Départment of Pharmacology, Dr. Harvansh Singh Judge, Institute of Dental Sciences, Panjab University, Chandigarh, India. 2MD (Pharmacology), Professor, Department of Pharmacology, MM institute of medical sciences and research, Mullana, Haryana, India. 3MD (Medicine), Professor, Department of Medicine, Govt. Medical College, Rajindra Hospital, Patiala, Panjab, India., India