Sedating antihistamines uk sanedating com


25-Sep-2019 18:01

Cetirizine is called a non-sedating antihistamine, and is therefore unlikely to cause drowsiness.However, some people may experience some slight drowsiness.The ones you see in over-the-counter sleep aids are usually diphenhydramine and hydroxyzine.

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It is one of the oldest antihistamines available (classified as a first-generation antihistamine), but for many patients surpasses the efficacy of even new prescription drugs.Once released, this histamine causes small blood vessels (called capillaries) to widen (dilate).This causes many of the symptoms of allergy, as these blood vessels then start to leak their contents into the body tissues causing inflammation of the nose, eyes or airways and results in itchy watery eyes, a runny nose, sneezing and nasal congestion.This flexible dosing makes it ideal for dust and pet allergy sufferers who have short-lived attacks, and for hay fever sufferers as it can be taken in the morning and evening when pollen is at its peak.

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Acrivastine is called a non-sedating antihistamine. However, people react differently to medicines and some people may experience some drowsiness.

Histamine is stored in ‘mast cells’ which can be found in almost all tissues of the body.