Please, anyone with very serious breathing conditions stemming from phrenic nerve (for any cause) miss/malfunctioning, share whatever you can. I have strong diaphragm spasms (“mega-hiccups”) that if not stopped conduce to the entire diaphragm “disappearing”. To make it much worse, very potentially lethal, my intercostal muscles go “out of commission”…but the phrenic nerve has nothing to do with the latter muscles. I don’t feel asphyxia or anything like that; feel nothing but, only in my head, the deprivation of oxygen… as my vision goes dark as in gradually fainting. Immediate CPR with a sublingual TINY tablet of OTC candy laced with peppermint (e.g., altoids) gets me out of it. By the way the sublingual peppermint tablet stops the whole process but only when still in the mega-hiccups phase… which occur irregularly-sporadically, anywhere, anytime, triggered, usually by swallowing anything including saliva, or even without swallowing anything. I have an old serious lesion (from teenager Greco-Roman wrestling) on C3-C4 that, a neurosurgeon suggested, may be affecting the phrenic nerve, in turn affecting the entire diaphragm, by he couldn’t say anything regarding the intercostal muscles. Idiopathic causes is all what all specialists that have seen me “diagnose” and don’t give me treatment (even the neurosurgeon advised me to stay away from surgery ). Boxes of those tablets are in every single room in my house, including garage, shed, backyard, in my pockets, and never leave home without the little tablets… and without my wife, who is very well trained and has robust practice on CPR. I take a daily 50 mg “pearl” of OTC peppermint oil, and “deploy” a sublingual big tablet before even starting the car…always with my wife in the passenger seat. I drive only on backroads; my wife does any other driving.