Do you know the signs of an overdose? Do you know what to do?
Call 9-1-1 Immediately!
If you don't carry Narcan/Naloxone call 9-1-1 immediately. You can also try to help the person by starting some rescue breathing techniques while waiting for the ambulance.
One technique is to turn the person on their left side in the recovery position. Push in on the side of their chest over their lungs to push air into their lungs.
If you are comfortable doing CPR on the person, if there is no pulse by all means start CPR. If you get a pulse, turn them on their side in the recovery position and proceed with the rescue breathing technique until help arrives.
Keep them in the recovery position. The person will likely throw up. The recovery position is to prevent aspiration.
More Information on the Recovery Position
Heroin Overdose App for phone