I have no way of knowing. The body is pretty complicated, and choline is used for many many things other than making the neurotransmitter.
Since Mestinon has been around for decades, I would think using choline would appear in the drug information about it, as a warning etc.
This is the results of a drug checker for the combination of
Mestinon + choline:
http://www.drugs.com/interactions-ch...49-0,1971-2061
Nothing has been reported as yet.
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Weezie looking at petunias 8.25.2017
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