The Department of Zoology, IIS (deemed to be) University, Jaipur, organized a guest lecture entitled “Mechanism of action of pharma drugs” on 5th December 2018. The lecture was delivered by Prof. Ganesh N. Sharma from School of Pharmaceutical Science, JNU, Jaipur. He enlightened students about the mode of action of any drug in animal model. Beside this he gave information about many different tests which can be performed to evaluate the effect of toxicant or drug in animal.