I have read your last two posts. When I was much younger, I took Benadryl for sleep and my doctor told me to stop because of the possibility of causing dementia in later life. So I switched to Melatonin.
Well, now I am 73 and in the last few years have developed PN that is pretty painful in my feet. I, like you, took some Benadryl to help me sleep. (Dementia be damned by now.) Guess what? The next morning my feet felt pretty good. Not all day but for a few hours. I don't know if it was the antihistamine or that I slept so well. So, I have been wondering, what if I took just one(25mg) at night?