Often times, people will try different things to revive a person from their overdose - either things they have heard may help, or what they have witnessed others doing.
The following responses are NOT effective and are UNSAFE:
Placing a person in a bath/cold water
Inducing vomiting
Inflicting pain by slapping, kicking or burning
Letting people sleep off their high
Injecting the person with other drugs (e.g. thinking stimulants will counteract the overdose)
Leaving the scene ... DO NOT leave the overdose victim alone.