Chills / shivering / lightheadness from reflux event (and/or Prilosec)?

I'm a GERD newbie, age 62, never anything worse than occasional heartburn over the years until a couple of months ago. During that time I've progressed from having intestinal bloat/discomfort (probably SIBO but not formally tested, just doctor's assumption) to increasingly frequent acid reflux and finally severe night-time reflux every night for the past few nights.

At primary care doctor's suggestion I had been taking Zantac, but when that started losing effectiveness I switched to Prilosec five days ago. That's when things started going nuclear. Second day in I had stomach bloating & sense of slow stomach emptying. That night I awoke to a feeling of fairly severe chills / shaking very much like low blood sugar symptoms, with normal/low body temperature. Got myself downstairs, drank some apple juice, felt better after 15-20 minutes. Over the past several days this has happened a few more times, most strongly triggered by episodes of reflux that wake me up--a few seconds after waking, the chills/shivering begin. Once or twice severe enough to be pretty scary. The constant night-time reflux had not occurred before I took Prilosec.

The afternoon shivering episode two days ago was severe enough that I nearly went to the E.R., and then did go yesterday, when feeling better, to see whether there were any serious underlying issues, but bloodwork & EKG both came back normal.

I discontinued the Prilosec day before yesterday, switched to an H2 blocker before bed, still had the nighttime reflux but not the shivers.

So I'm wondering whether this is most likely a (rare, looks like some after-market reports) side effect of Prilosec, or the coincidental result of GERD getting worse. If anyone out there has had a similar experience, with or without Prilosec (or other PPI), I'd appreciate hearing. In two days I'll be seeing my primary care doctor to discuss all this & expect to be referred to a GI specialist.

Meanwhile I need to decide whether to try Nexium starting tomorrow (ER doctor's Rx), or hold off to see where things go. Unfortunately the night-time reflux is bad enough that positional solutions are not controlling it--sleeping on left side w/wedge pillow, even sleeping upright, I'm getting reflux sufficient to wake me up.

No, tablet form.

A day later, off the Prilosec, chill/shaking symptoms have not recurred, but I'm having increased symptoms of delayed stomach emptying along with the GERD. So I'm guessing that the combination of Prilosec, reflux, and some other underlying condition could account for the response.

Just started on PPIs myself after a bout of gastritis. After a week, I am absolutely shivering. This happened 10 years ago when I was put on them before - with disastrous consequences. This time I know what is going on. PPIs control the ATP'ase system (Adenosine Tri Phosphatase) in not only the proton pumps in your stomach but also elsewhere in the body. ATP is responsible for the energy in your cells. If your ATP levels drop, you can get Chronic Fatigue (as I did 10 years ago) and low body temperature. (Its like switching off your body's central heating). PPIs also drain the magnesium from your body - again this can decrease ATP and create anxiety. I would suggest that people on PPIs take additional magnesium supplementation, This seems to at least eliminate the fatigue although I have not figured out how to eliminate the shivering.