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A 33-year-old member asked:

How many days should i wait when switching from an otc antihistamine to another otc antihistamine?

1 doctor answer2 doctors weighed in
Dr. Heidi Fowler
Psychiatry 25 years experience
Drug safety: There may be no wait time (except waiting for the period between doses of the original medication). To know for sure, talk to your pharmacist and provide the specific names of each antihistamine in question.

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Last updated Sep 9, 2020
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