1. Check for overdose. Signs of overdosing: not breathing well, turning blue/gray, not reacting when you rub your knuckles on their chest. 2. Call 911. Say "someone isn't breathing" and/or "I think it's an overdose." Stay until help arrives, even if they seem better. 3. Give Narcan. Push pump only after tip is in nose. Go to Step 4. If no response in 3 minutes, give another dose.