Randomized Controlled Trial (RCT) is a study in which people are allocated at random to receive one of several clinical interventions. It is a type of scientific experiment which aims to reduce bias when testing a new treatment. RCT is one of the simplest and most powerful tools in clinical research. It is often use to test the efficacy or effectiveness of various types of medical intervention and may provide information about adverse effects, such as drug reactions. Random assignment of intervention is done after subjects have been assessed for eligibility and recruited, but before the intervention to be studied begins.