If you had an anesthetic available that gave you time to put on the bag and tie your hands just before losing consciousness this would be one of the best methods, but even a pretty heavy dosage of benzodiazepines could help, in fact I'm aiming for this route; the last time I tried, in fact, despite having discomfort in breathing due to hypercapnia, I must say that the panic was very limited if not absent, I don't think there are specific drugs to counteract this hunger for air, which is then hunger for oxygen in reality, or rather to be precise not even this, it is simply the annoyance given by the rising CO2, in fact with the inert gas method with both oxygen and CO2 absent you don't feel any annoyance but I'm not in a position to be able to develop this method so I'll get it this hypercapnia trying as much as possible to sedate it with benzodiazepines.
