Yes, I'm not quite ready yet .... research stage.
Comparing sodium azide to nitrate. i can't find much relevant information. The latter appears to be death by nitrite poisoning.
A source 'Survivors of serious sodium azide poisoning may have heart and brain damage.' Not what I'm looking for.
I'm not sure what's going to kill you. Respiratory failure ? (choking, conscious or not) How long till you die ? Any numbers ?