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2. Which Allergy Medicine Is Actually Most Effective? - AOL

   www.aol.com/lifestyle/allergy-medicine-actually...

   And it matters, because although Zyrtec (the brand name for cetirizine) and Claritin (loratadine) are similar medications, “patients can absolutely have differing responses to Zyrtec and ...

3. Cetirizine - Wikipedia

   en.wikipedia.org/wiki/Cetirizine

   Among second-generation antihistamines, cetirizine is more likely than fexofenadine and loratadine to cause drowsiness. [8] Use in pregnancy appears safe, but use during breastfeeding is not recommended. [9] The medication works by blocking histamine H 1 receptors, mostly outside the brain. [6] Cetirizine can be used for paediatric patients.

4. Levocetirizine - Wikipedia

   en.wikipedia.org/wiki/Levocetirizine

   Levocetirizine is an antihistamine. It acts as an inverse agonist that decreases activity at histamine H1 receptors. This in turn prevents the release of other allergy chemicals and increases the blood supply to the area, providing relief from the typical symptoms of hay fever.

5. H1 antagonist - Wikipedia

   en.wikipedia.org/wiki/H1_antagonist

   The newer, second-generation H 1-antihistamines are far more selective for peripheral histamine H 1-receptors and have a better tolerability profile compared to the first-generation agents. The most common adverse effects noted for second-generation agents include drowsiness, fatigue, headache, nausea and dry mouth.

6. Loratadine - Wikipedia

   en.wikipedia.org/wiki/Loratadine

   Loratadine, sold under the brand name Claritin among others, is a medication used to treat allergies. [5] This includes allergic rhinitis (hay fever) and hives . [ 5 ] It is also available in drug combinations such as loratadine/pseudoephedrine , in which it is combined with pseudoephedrine , a nasal decongestant . [ 5 ]

7. Antihistamine - Wikipedia

   en.wikipedia.org/wiki/Antihistamine

   Upon study of records in mouse studies associated with 40 common medications ranging from antibiotics, antihistamines, aspirin, and hydrocortisone, that for subjects with melanoma and lung cancers, fexofenadine, one of three medications, along with loratadine, and cetirizine, that target histamine receptor H1 (HRH1), demonstrated significantly ...