A drug may be classified by the chemical type of the active ingredient or by the way it is used to treat a particular condition. Each drug can be classified into one or more drug classes.
Topical antihistamine products are where antihistamines have been incorporated in creams, nasal sprays and other agents that can be applied locally (for example to the skin) to treat allergic reactions.
Antihistamines block the histamine receptors, which when activated cause allergic reactions such as hay fever, itching and rash. Topical antihistamines are used to relieve the symptoms of hay fever, itching and to resolve rashes due to allergy.
See also
Medical conditions associated with topical antihistamines:
- Atopic Dermatitis
- Dermatitis
- Eczema
- Lichen Simplex Chronicus
- Pain
- Pruritus
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