A member asked:

Does clarinex (desloratadine) work with your first pill, or does it take time to start working?

A doctor has provided 1 answer

The first time: Time from ingestion to full activity is about 1 to2 hours. The same dose will act in the same way each time you take it, but may not seem as effective if your exposure to allergen is greater.

Answered 11/3/2016

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