https://www.zerohedge.com/medical/several-common-drugs-are-linked-dementiaOnce again I am thankful I am one of those people who don't like taking anything I can avoid...term for it, forget what it is...helps I have a higher than normal pain threshold too...but I have to look into the histamine issue as I occasionally take them...
Example Drugs
H-1 Antihistamines
Diphenhydramine
Cetirizine
Chlorpheniramine
Cyclizine
Dimenhydrinate (incorporates diphenhydramine and a stimulant compound)
Doxylamine
Hydroxyzine
Meclizine
H-2 Antihistamines
Cimetidine
Famotidine (most common H-2 antihistamine that is used in the United States)
Raniditine (removed from market)
Nizatidine
Roxatidine (not available in the USA)https://www.ncbi.nlm.nih.gov/books/NBK538188/