Narcotics are type of pain killers?

Yes. By definition, narcotics are substances that cause a condition called narcosis. Narcosis is defined as a condition of deep stupor or unconsciousness produced by a drug or other chemical substance. In smaller doses, the deep stupor or unconsciousness may not be achieved, but the pain reduction will be there. There are many different narcotics... some are legal and may be used by prescription; others are illegal and may be used to ruin your life.