Antihistamines block histamine, a symptom-causing chemical released by your immune system during an allergic reaction.
Antihistamines include:
- Cetirizine (Zyrtec, Zyrtec Allergy)
- Desloratadine (Clarinex)
- Fexofenadine (Allegra, Allegra Allergy)
- Levocetirizine (Xyzal, Xyzal Allergy)
- Loratadine (Alavert, Claritin)
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