Heroin is a highly addictive drug that is processed from morphine, which comes from the seed of a poppy plant. It is a sedative that obstructs the central nervous system. Heroin can be ingested intravenously , smoked or snorted. Heroin is a highly addictive drug, and abusing this drug had become a critical problem in the United States. According to NIDA research and statistics, there is a high increase in the amount of people who are snorting and smoking heroin, in comparison with those who use it intravenously. The reason for this change is an erroneous conception that snorting and smoking heroin will not result in addiction. Furthermore these forms of ingesting a drug apparently augment the purity of heroin. Cognitive Functioning Chronic use or abuse of heroin can lead to a permanent and destructive impairments on mental capacity. The negative effects on brain malfunctioning may result in memory loss, segmented, and judgment abilities.