These side effects are for MAO Inhibitors - which is the similar to having your MAO A enzyme production inhibited by a homozygous mutation
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I can relate to a lot of the things on that list: chest pain, severe headache, stiff neck, dry mouth, constipation, muscle aches, paresthesia. Some of them were resolved with magnesium (though I still have to take a lot). I'm now wondering if they would be better addressed with MAO improvement.
The stiff neck especially is the bane of my existence. It's this constant pain on the back of my neck that seems to "spread" down into my arms and into my wrists. My wrists hurt a lot too. I have these kinds of hotspots all over my body, but my neck and wrists are by far the biggest ones. Other ones include: sternum, lower back, hips, ankles.
I already take a multi with a decent amount of B2 (25mg). I'm definitely going to try taking a separate B2 supplement to see if it helps though. Thank you!