I stumbled across this fix recently myself. I think. I am a 6-year diagnosed Parkinson's patient. A year ago I had DBS (Deep Brain Stimulation) surgery to alleviate some of my symptoms, and it helped a lot, mainly with my arm/hand tremor. Prior to surgery my wife asked the surgeon what we should expect in terms of personality and cognition changes. "You may be more sensitive" he said. By which he apparently meant I'd cry a lot if I'm exposed to the slightest stimulation, i.e. just about anything the least bit sad or heroic in a tv show or movie. I self-diagnosed, confirmed by my neurologist, that I was experiencing PBA, a not-uncommon side-effect of DBS surgery.
The only medication he could offer was Nudextra, a $1000/month mixture of dxm and quinine. Yes, cough medicine and tonic water, but in a more potently expensive chemical blend. I forewent the meds and kept my money in my pocket, choosing instead the tearful mantle of Renaissance Man.
A few weeks ago I stumbled upon a great placebo (or great home remedy, I'm not yet sure which), which I now find validated somewhat by your Alka Seltzer routine. My method is to drink some club soda, inhaling the CO2 while drinking it. Consider the similarities: breathing into a paper bag to cure hyperventilation episodes, Alka Seltzer's production of CO2 when you make it... all these things mess with your breathing, just like dxm. Right? I'm not a doctor, nor am I in any health-related field, so this is really just anecdotal, speculation, so far. I just think the common thread may be useful to check out.
#Neudexta, $1100/month