Most antihistamines can be bought from pharmacies and shops, but some are only available on prescription.
This page covers: Types of antihistamines How to take them Side effects Taking them with other medicines, food or alcohol Who can take them – including pregnancy advice How they work There are many types of antihistamine.
Allergies occur when your immune system erroneously thinks an innocuous foreign substance, such as pollen or pet dander, is actually dangerous.
Histamines jump to action, causing the range of symptoms associated with allergies (sneezing, itchy eyes, chest congestion, wheezing, etc.).
For example, when you're fighting a cold (the rhinovirus), histamines widen the blood vessels in your nasal cavity, causing nasal congestion.
Often you will find that the itchiness of your skin is reduced when you use regular moisturisers to keep the skin soothed and hydrated, and control the inflammation with topical corticosteroids or other newer medicines.Rather than risk the problems associated with these drugs, use natural antihistamines that can halt your symptoms without putting your health at risk.Damaging pharmaceuticals When your body is exposed to allergens, it reacts by releasing histamines that attack cells in the body, this causes them to swell up and leak fluid.In these conditions they work by preventing the actions of histamine, which is a substance produced by the body as part of its natural defences.It's stored in cells called mast cells, in almost all tissues of the body, and is released when the body reacts to a foreign substance (known as an allergen).This results in the common allergy symptoms of watery eyes, congestion, swelling of the nasal passages, itching, sneezing and runny nose.