Types of non sedating antihistamines

In many cases, the cause of chronic hives cannot be identified despite detailed testing; in this instance the condition is called idiopathic urticaria.In approximately 50 percent of cases of idiopathic urticaria, the immune system is causing the release of chemicals such as histamine.Chronic urticaria should be evaluated by an allergist-immunologist.

In other cases, chronic urticaria may be associated with thyroid disease or other hormonal problems.

Rarely, chronic urticaria has been associated with cancer.

Most often, the rash is linear, following the path taken by the act of scratching.

Delayed pressure urticaria is swelling that appears on areas of constant pressure from belts and constricting clothing such as sock bands.

The most common reason for long-lasting urticaria is dermographism.

These hives appear within a few minutes of scratching along an area of skin.

Low-sedating or non-sedating antihistamines are preferred because they are effective with minimal side effects.

Frequently, your physician may try a combination of two or three antihistamines.

An episode of hives may last from a few minutes to several hours to several days to several weeks.

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