Dr. N. Sai Krishna is currently working as Professor in the Department of Pharmacology, A.K.R.G. College of Pharmacy, Nallajerla, Andhra Pradesh. He has completed his Ph.D in Gitam (Deemed to be university), Visakhapatnam, Andhra Pradesh. He published 50 research papers in national and international scientific journals. His area of interest is pharmacology and toxicology.