and I'd love to give you my histamine system so you can find one that works reliably and doesn't make you feel fecking horrible.
I now take a cocktail of 3 different Antihistamines usually on bad days which manages to stop my eyes going bright red and making me partially blind, prevents the feeling of wanting to rip my own throat out as it ITCHES SO MUCH and has the bonus of reducing my nose to a minor drip not a gush.
I have tried loads of branded, unbranded and prescribed antihistamines - I now have to take a prescribed ones for about 8 months of the year to keep my hayfever at bay at least a little. This in the height of the season is supplemented by 2 more types to layer the defences. So I can function, mostly.
Yeah they exist but like our current political opposition they can be damn ineffectual at actually doing their job.