Lithium is powerful anti serotonin nutrient... Heals gut like no other agent ...
Tianiptine is powerful but has some side effects...
And yes Triiodothyronine is great against serotonin...
Active Charcoal is a good tool as well
Lithium? I thought it could cause SS when mixed with SSRIs and the likes, but it's fine on its own? I'll give T3 a try eventually, and charcoal as well, but right now I don't want to risk getting even worse.
Have you considered increasing the intake of vit K1, folate, choline, through foods? Possibly selenium as well. Vit C can be tricky because it affects trace minerals too much, and you might already be in need for more.
Vitamins and minerals are not on the top of my list atm, but I'll get to it if I can tolerate the potato juice.
The SSRIS definitely threw off his nuerochemistry, simple solutions are logical, but I know from experience, this manifestation has a life of its own that can't always be remedied immediately.
So true, this disaster is anything but easy to solve.