Use the drop-down menus to select the answer that completes each sentence. In a clinical trial, participants are divided into two groups: the experimental group and the . The control group takes the , while the experimental group takes the drug. The effects on the group that are treated with the drug are compared to the to see how different the two groups are. These trials are designed to be so that patients and physicians are unable to affect the results based on their own bias. After clinical trials and approval, the FDA mandates of drugs to continue to monitor the safety of a drug.