Hi MrsD!
Thank you for your quick response!
Thanks, too, for the article you have cited! Interesting!
Strangely enough, myoclonus is triggered with SSRIs (for me), even with one SSRI source only and there's never any suspicion of a serotonin syndrome. (Although that does not mean a serotonin syndrome is not going on. I wonder what some of the other causative factors may have been-- possibly an organ function that was "borderline"okay at the same time, ie: kidney or liver, etc. Hard to know. I think these matters can be complicated/multifactorial, for sure.)
I had myoclonus one time when the only abnormal lab function was a borderline low ferritin level.
I am going to try your suggestion!

I am staying cool as we have the A/C going at home. Yet, this is a benign approach and well worth a try.
Interestingly enough, the athletic trainer/PT/chiropractor I have worked with, intermittently over the years, for strength training and cardiovascular conditioning, always ices my spine immediately after I am finished any training activities. At these times, ice has helped me to not go into states of more severe flares and keeps me better able to attend the next conditioning session.
I had thought I had really good control with the ionic magnesium for a few days! I was thrilled with the control! The only thing that had suddenly changed was: I was unexpectedly out in the very hot heat (due to a car accident-- no injury) and within a couple of hours, the back of my neck/head area had felt swollen and very stiff. I get this type of swelling if exposed to the heat for very long and then, typically, things go awry for a fairly long time. I have learned to avoid heat exposure at all costs.
I am still using the ionic magnesium and am sure it is helping the situation!
I alternate it with the Slow-Mag formula.
The ionic magnesium is amazing stuff. My husband was injured while mountain biking this past weekend. He had terrible spasms in the piraformis region (caused by an injury to this region) and these spasms were impinging upon a nerve, causing sciatica. He was in agony. Once I had found the muscle spasms were underlying the nerve pain, I had him drink the ionic magnesium. Within 2 "doses," he was fine... the spasms had let up and had totally released the nerve. (This piraformis scenario can otherwise go on for another 7-10 days, with trips to PT, etc.)
Hmmm.... yes, this myoclonus and dystonia stuff is complex.
There again, my spastic hand is much improved with the ionic magnesium.
So...even the amino acids just don't target myoclonus well?
I imagine this process is very different from the process with Tourette's and any variety of tics, etc.
I am very grateful for your replies, MrsD. You are so kind to all!
With Sincere Gratitude!
~DejaVu