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A member asked:
How long it take for claritin (loratadine) to work?
A doctor has provided 1 answer
About 1.5 hours: Onset of clinical relief is about 1 hour for zyrtec and Allegra and about 1.5 hours for claritin (loratadine). To read the study, go to: http://www.Ncbi.Nlm.Nih.Gov/pubmed/15176489.
Answered 8/16/2018
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