Cyproheptadine - DrugBank "Most antihistamines possess significant anticholinergic properties, but Cyproheptadine exerts only weak anticholinergic actions."
I think I've heard Dr. Peat recommend doxylamine succinate and diphenhydramine if you can find them without toxic excipients.
But I agree taking antihistamines every day is not a long-term solution. As for diet, I think pretty much everything Dr. Peat recommends aims to reduce fat oxidation/stress. Fructose, calcium, saturated fat (I think coconut oil in particular, even more so than butter/ghee/animal fat, since it strongly raises pregnenolone and lowers serotonin), fat soluble vitamins, gelatin, everything that is pro-GABA & anti-excitation.
Thanks for that lampofred, I may get doxylamine succinate to try in important situations. Diphenhydramine is a sleeping aid I have used, it works well, but no good for what I need it for! I've never noticed any improvement when I used to eat loads of coconut oil in my paleo days. Guess my nervous system is just FUBAR