Background: Propofol is one of the most commonly used anaesthetic drugs. Extensive researches have been done on the factors affecting the induction dose requirement of propofol forbetter hemodynamic stability. In the literature there is no mention on the dose requirement of propofol in the hydrated patients. This prospective randomized double blind study was done to assess the effect of preloading on induction dose requirement of propofol in patients undergoing general anaesthesia requiring endotracheal intubation.