Using antihistamines properly- Guidance by allergy experts

Written By : Hina Zahid |Medically Reviewed By : Dr. Kamal Kant Kohli Published On 2021-04-08T19:00:15+05:30 | Updated On 8 April 2021 6:56 PM IST

Hamilton, ON - If you are one of the millions of people worldwide suffering from allergies, you may take an antihistamine pill to ward off hives, sneezing and watery eyes.

But you may be taking your medications incorrectly, says Derek Chu, a McMaster University allergy expert and clinical scholar.

"People need to rethink what they stock in their home cabinets as allergy medicines, what hospitals keep on formulary, and what policymakers recommend. The message needs to get out. This publication is on time for the spring allergy season and as COVID vaccines roll out, for which rashes are common and antihistamines can be helpful," said Chu.

Co-author Gordon Sussman, professor of medicine at University of Toronto's Temerty Faculty of Medicine, agrees.

"There are new modern second generation antihistamines that are potent, specific, fast acting and of proven safety which everyone should be using to treat allergic rhinitis and hives," he said.

This team's study is published in the Canadian Medical Association Journal (CMAJ), and list five facts to know:

1. Antihistamines are among the most commonly and incorrectly used medicines worldwide.

Antihistamines are best used to relieve symptoms of hay fever and outbreaks of hives, but not for asthma, eczema, coughs or insomnia.

2. First-generation antihistamines are associated with substantial and sometimes fatal side effects.

Antihistamines with diphenhydramine, chlorpheniramine or hydroxyzine are first-generation antihistamines that can cause drowsiness and affect cognitive functions such as school performance. Overdosing can cause death and they are potentially dangerous for both young and older people.

3. Newer antihistamines are safer, as affordable and as effective as first-generation antihistamines.

Later-generation antihistamines are proven to be more effective and last longer with less side-effects like drowsiness.

4. Antihistamines should not be used instead of epinephrine to treat anaphylaxis.

Oral drugs can be used together with epinephrine injections to treat anaphylactic reactions, but they are not a substitute.

5. Most antihistamines are safe to use during pregnancy and breastfeeding.

Medical research has shown that antihistamines at standard doses do not harm fetuses during pregnancy and may be used during breastfeeding. They are also safe for children to use.

https://www.cmaj.ca/content/193/14/E478

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Source : Canadian Medical Association Journal

Hina Zahid

Hina Zahid Joined Medical Dialogue in 2017 with a passion to work as a Reporter. She coordinates with various national and international journals and association and covers all the stories related to Medical guidelines, Medical Journals, rare medical surgeries as well as all the updates in the medical field. Email: editorial@medicaldialogues.in. Contact no. 011-43720751

Dr. Kamal Kant Kohli

Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751