Antihistamine and Cognition

I am a long term user of anthistamines and use antihistamines for at least 2 weeks of the month before my period when everything just itches, although do tend to reduce the dosage by splitting my tablets in 1/2 or if it is easy into quarters.

One of the things I observed is that I tend to be more forgetful and wondered if this was a sign of dementia. Had also noticed when am off antihistamine, the cognition improved and my memory was far better.

Interesting to read this article that appears to confirm my observations:
https://www.ncbi.nlm.nih.gov/pubmed/10856168

Here is another article you might want to look at if you use Anthistamines:
https://www.mdedge.com/edermatologynews/article/10460/atopic-dermatitis/most-antihistamines-cause-some-cognitive-impairment

Remember to drink more water (find using a bottle helps me) and to eat more greens (thankfully I grow my own)