Heroin is an opioid drug, which is synthesized from morphine, a naturally occurring substance, which is extracted from the seeds of, of some particular species of the opium poppy plant. It is commonly available as a fine white or brown powder, a brown powder known as Mexican brown, or as a black sticky substance, the Black Tar heroin. Heroin is usually taken through injection or smoking which sometimes with snuffing produces effects such as euphoria and relaxation. Although it is very effective then most medicines, it is highly addictive and when taken it causes respiratory depression, overdose and other serious changes to the brain. Physical dependence can be experienced and it has known social and economical impacts if abused severally.