Because significant tolerance to respiratory depression develops quickly with continued use of heroin and is lost just as quickly during withdrawal, it is often difficult to determine whether a heroin death was an accident, suicide or murder. Facts about heroin and how it makes the user feel depends on how much they use, their tolerance, weight, and how often they use. The “high” from heroin can last anywhere from 2 to 8 hours. However, the average is 2-4 hours. The initial rush lasts a couple of minutes, and then a feeling of warmth and tiredness takes hold and lasts the duration. Makers of ecstasy can add anything they want to the drug. So the purity of ecstasy is always in question. Internationally, heroin is controlled under Schedules I and IV of the Single Convention on Narcotic Drugs. | 
