Yes Sue1972, I know how you feel about being on them long term

& as my symptoms are of very long duration I'd also hoped to find a way of resolving them that didn't involve drug treatment. I'd experimented with Cetirizine & Loratadine to see whether they reduced my night sweats & flushing but to no benefit, so that made me more ambivalent about Fexofenadine & I was was deferring it until I felt I had no further options. Can I ask have you tried any antihistamines other than Fexofenadine & if so, did they have any beneficial effect on your menopause symptoms?
If you are considering a histamine reducing diet, depending on which source you look at the lists of foods to exclude can be dauntingly restrictive, impractical even, but if you can cut out those foods most likely to be problematic that might give you enough relief without compromising too much.
To save you a potentially wasted google - it's Dr Tina Peers with the expertise in histamine intolerance, not Peters. I was going to include a link to her website in my earlier post but didn't feel I could do so because of forum rules on commercial sites. I haven't seen her myself but I remember some other members have.
I recall a member called RebJT is pretty knowledgeable on histamine issues if you'd like to look for some of her posts.
Wx