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A 17-year-old male asked:

Hello i am having a mild allergic reaction to some cake i was wondering if taking one 10 mg tablet of loratadine would be ok. i already took one about 3 hours ago for 24 hour relief of sinus allergies but i was wondering if taking another one right now wo

1 doctor answer6 doctors weighed in
Dr. Corey Clay
Allergy and Immunology 12 years experience
Not the best option: If true food allergy (antibody mediated), then second generation antihistamines (Loratadine, Zyrtec, Allegra) are of little benefit. Itching/hives from foods occur rapidly (usually within 30minutes and certainly within 2 hours) and disappear rapidly. First generation meds like Benadryl (diphenhydramine) work much more quickly. If other symptoms (breathing, dizziness, nausea), injected epi is critical. (see comment)
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Dr. Corey Clay
Dr. Corey Clay commented
Allergy and Immunology 12 years experience
Provided original answer
Zyrtec and Allegra begin to work more quickly than Loratadine and have a slightly stronger effectiveness; so they can be added to ensure hives don't return once the Benadryl wears off. Remember that food allergy typically worsens with subsequent exposures and this is caused by immune memory. If you think you've had a food allergy, then see an Allergist to confirm, discuss risk, and plan strategy.
Nov 16, 2015
Last updated Nov 21, 2015


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