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==Treatment==
 
==Treatment==
Acute urticaria often resolves spontaneouly without requiring treatment. Dexamethasone given once at a dose of 0.1 mg/kg IM usually results in resolution of clinical signs within 24 hours.  Recurrent cases may require further investigation in order to determine the underlying cause. This may include further investigation of the animal's history and response to withdrawal of drugs or topical products. If no underlying cause is found, an investigation for allergies is indicated and may include intradermal allergy testing, insect control trials and an elimination (novel protein) diet.  
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Acute urticaria often resolves spontaneouly without requiring treatment. Dexamethasone given once at a dose of 0.1 mg/kg IM usually results in resolution of clinical signs within 24 hours.  Recurrent cases may require further investigation in order to determine the underlying cause. This may include further investigation of the animal's history and response to withdrawal of drugs or topical products. If no underlying cause is found, an investigation for allergies is indicated and may include intradermal allergy testing, insect control trials and an elimination (novel protein) diet. Biopsy of lesions is generally unrewarding but may reveal a mild to moderate perivascular to interstitial dermatitis. Antihistamines such as Hydroxyzine may be useful in the management of chronic urticaria but are ineffective in treating acute urticaria. Acupuncture has been reported to be effective in one horse.
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==Prognosis==
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The prognosis with urticaria is generally favourable because general health is not usually affected.
    
==References==
 
==References==
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