It is not good to believe in some methods that they are peaceful. Remember that PPH also added cyanide as a peaceful method. But cyanide kills you in 15 minutes with terrible suffering. Remember that the PPH manual was also modified, at first it said that the dose of propanolol is 2 g, then 1 g, then 800 mg together with propanolol. It's best not to rely on numbers
it is good to study more when choosing and applying a method.
Nitrite does not kill like cyanide or sodium azide. It has a different mechanism, "methemoglobinemia", it does not allow oxygen to reach the brain. Because of this are those unpleasant symptoms, agitation, skin discoloration, rapid heartbeat, "tachycardia" and shortness of breath. Propanolol makes you lose consciousness faster and this is true, because it interrupts the signal that reaches the heart from the brain. This means that the time until the loss of consciousness is shorter but the suffering remains more intense. Ok propanolol is good for the heart. Now all you have to do is take a strong sedative (narcotic). But unfortunately it is only given by prescription, do not think that if you took an ativan pill or other benzo sleeping pill you will not suffer anything, they produce a hypnotic sleep, so you will wake up if the breathing is accelerated and the heartbeat
so you will wake up if your breathing is accelerated and your heartbeat