Sedative: The drugs interact with central nervous system to depress its activites. Narcotics: Narcotics are strong painkiller. These drugs are often prescribed in conjunction with other less potent pain killer. Correct Answer Sedative: The drugs interact with central nervous system to depress its activites. Narcotics: Narcotics are strong painkiller. These drugs are often prescribed in conjunction with other less potent pain killer.