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Online Clinic on Allergies - Feb 2017

Action Against Allergy (AAA) provides information, advice and support to those made chronically ill through the many different forms of allergy and those who care for them.

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food allergy

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Histamine Intolerance

Postby goody2shoes on Mon Feb 13, 2017 10:01 pm

Hi! Which antihistamine is safe to take for histamine intolerant people? I need an antihistamine for my skin allergies and to keep the acid down from the histamine intolerance. As far as I know there are only two that don't lower the daomine oxidase further - the cause of histamine intolerance: Fexofenadine hydrochloride but my GP believes I have had an allergic reaction to the pink colouring of the tablet and Benadryl, which I cannot get on prescription and the over-the-counter dose is insufficient.
Also, do you know of any specialists in the field of histamine intolerance who I could be referred to? I live in the Surrey area.
Thank you for your advice.
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Re: Histamine Intolerance

Postby Dr Chris Rutkowski on Mon Feb 13, 2017 10:48 pm

Dear goody2shooes, what are your symptoms? Is it only skin (urticaria/hives) or other organs are affected too? Most antihistamines have no influence on DAO activity; only one study suggested inhibition of DAO by cimetidine and dihydralazine and increased activity by diphenhydramine. H2 antihistamines such as ranitidine can help with your reflux/stomach ulcers but also some skin issues; cetirizine/loratadine/ fexofenadine/acrivastine improve mainly skin/upper respiratory tract symptoms. Adverse reactions to fexofenadine (and fexofenadine colouring) are vanishingly rare
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Re: Histamine Intolerance

Postby goody2shoes on Tue Feb 14, 2017 5:56 pm

Thank you doctor for your reply yes I do have other organs that are affected my eyes are always burning and stinging with puffy red and swollen eyelids my eyes feels dry and are always affected when coming into contact with perfume, chemicals and uv rays despite taking antihistamines and I would be constantly sniffing my nose would feel completely blocked up without them. I am guessing that maybe histamine intolerance makes me a more sensitive & allergic person?
Thank you again
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Re: Histamine Intolerance

Postby Dr Chris Rutkowski on Wed Feb 15, 2017 9:45 am

Thank you. Your symptoms might require an allergist's input. Please discuss a referral with your GP.
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