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A 22-year-old female asked:

i would like to switch from allegra to zyrtec. if i took an allegra this morning could i take zyrtec the same day just so i could do the switch over?

1 doctor answer1 doctor weighed in
Dr. Clarence Grim
Endocrinology 57 years experience
Allergy meds.: Mostly likely will be no problem.

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Last updated May 4, 2017
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