Share this sentiment. SN isn't perfect. It carries all the risks mentioned - violent vomiting, fast heart rate, and headache - but it's better than the alternatives.
I hardly see how this method could be better than drowning, for example.
Is it more accessible? Unlikely. Finding an appropriate water pool is often much easier than obtaining SN with all supplementary aids.
Is it more simple? Unlikely. The whole drowning plan consists of only 3 stages: finding/making a pool of water, hyperventilation, and holding yourself underwater.
Is it more reliable? Unlikely. You can't survive underwater, but you can survive poisoning.
Is it more safe if you decide to abort the procedure in its final stage? Unlikely. Both methods may cause harm to organs due to hypoxia, but in case of drowning you may stop the destructive processes quickly and before passing out, while taking antidote for SN requires some time to be absorbed and to neutralize the poisoning, so its effect may take place at a very late time.
Is it more fast? Unlikely. 30 minutes is more than enough to prepare for drowning, and the final procedure takes just 4 - 5 min before passing out.
Is it more peaceful? Unlikely. With proper techniques, the time of struggling underwater may be reduced to 30 - 60 seconds, while the remaining time (before feeling the urge to breathe and after the state of lightheadedness begins) is peaceful enough. It's very unlikely that you would deal with nausea or vomiting when drowning.
Is it better if you want to make your death looking like accidental? Unlikely. Poisoning has much more chances to be associated with a suicide or a murder than drowning.
Can you safely check the effect of the poison on your body for trial purposes? Unlikely. But you can relatively safely experiment with mechanical suffocation as long as your breath holds are not longer than 3 minutes and you don't do them too often.
So why are people so obsessed with SN? )))