I stopped taking my 2 or 3 a day 4mg Piriton about two weeks ago to see if my brain fog might improve. But within a week I had a major outbreak of Psoriasis rash on some of my torso and upper thighs. I often have a small outbreak on some fingers so I'd been given Eumovate Cream for that and started using it on the rash and it's almost completely gone. But I also started taking the antihistamines again, so I don't know which has "cured" my rash. I think in after a week or so I'll give up the antihistamines and see what happens.
FYI I was diagnosed with Psoriasis earlier this year. But the doctor never informed me that it was a autoimmune condition. But on top of that I was diagnosed with Hashimoto's Thyroiditis about 3.5 years ago, also an autoimmune condition. And about a year ago seem to develop an intolerance for gluten, yet another autoimmune condition.