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A member asked:
Will get second pfizer covid vaccine wednesday morning. can i take claritin for my allergies today....36 hours before vaccine? will it compromise effect of vaccine?
2 doctors weighed in across 2 answers
Very unlikely: Antihistamine such as Claritin is not known to affect immune response to vaccines including mRNA one.
Answered 2/24/2021
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Key concepts: Vaccine response can be affected by an immune modulator, and compromised by immune suppressant. An allergy OTC pill does neither, and in spite of ignorant comments by journalists, the important considerations are as noted.
Answered 2/23/2021
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