Well the best thing to take is narcan. That will give you a definitely survival rate. From my experience OD on opioids I wouldn’t go that far unless you’re also experiencing a lot of difficulty breathing. That being said. I’ve experienced the death rattle and survived without narcan. I puked. I was pale and shakey. I couldn’t breathe. I decided not to die and took my asthma puffer and fell asleep. Woke up six hours later. I mean. It was a gamble. I could have not woken up. If you can get some narcan or get to a hospital that is your best chance of survival. The worst thing you can do is take anything else. Even caffeine etc could make your heart fail. I would suggest a nap and a prayer that you wake up if you refuse to go the narcan route.