Mayo Clinic, it is “a symptom-causing chemical that is released by your immune system during an allergic reaction.” Histamines are the culprit for reactions such as sneezing or itching when you are exposed to common allergy triggers like pollen, dust, pollution, and more.
hay fever, food allergies, hives (urticaria), seasonal and perennial allergic rhinitis, and other allergy conditions. It is known to be a non-drowsy option compared to other allergy medicines, however, it can still cause some drowsiness in others. Possible side effects include headaches, drowsiness, dry mouth, sore throat, coughing, and more.
here.
here.
https://www.gosh.nhs.uk/conditions-and-treatments/medicines-information/types-medicines
https://www.nhs.uk/medicines/cetirizine/
https://www.nhs.uk/medicines/loratadine/
https://www.aaaai.org/conditions-and-treatments/drug-guide/allergy-medications
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