Chronic Urticaria Treatment & Management
- Author: Daniel J Hogan, MD; Chief Editor: William D James, MD more...
Medical Care
Avoidance of mental stress,[17] overtiredness, alcohol, nonsteroidal anti-inflammatory drugs, and tight-fitting garments is recommended. Psychologic stress can trigger or increase itching.[17] Nocturnal pruritus may be reduced by lukewarm bathing and keeping the ambient temperature of the bedroom cool. Application of lotions with menthol and phenol (Sarna) provide prompt relief of pruritus for some patients.
Nonsedating antihistamines remain the mainstay of treatment. Many patients find pruritus less troublesome during the daytime, with pruritus maximized at night when there are fewer distractions. An additional nocturnal dose of a sedative antihistamine such as hydroxyzine or doxepin may be added to the morning dose of a low-sedation anti-H1 antihistamine. Doxepin should not be used in patients with glaucoma and should be used with extreme caution in elderly patients or those with heart disease. Doubling the labeled dose of low-sedating antihistamines may benefit some patients, and increasing the dose of these antihistamines is often the safest therapeutic approach for patients who do not have an adequate response to the conventional dose of these medications. Increasing the dosage up to 4-fold is recommended by expert groups such as the European Academy of Allergology and Clinical Immunology.[17]
Up to 75% of patient with chronic urticaria referred to tertiary care centers may require higher than conventional antihistamine doses.[18] These higher nonsedating antihistamine doses improved quality of life but did not increase somnolence.[18] Long-term systemic corticosteroids are not recommended.[17] If high-dose nonsedating antihistamine therapy is not effective, than switching to a different nonsedating antihistamine could be considered or a leukotriene antagonist can be added.[17] Nonresponders to 20 mg of desloratadine may benefit from 20 mg of levocetirizine.[18]
Patients who respond poorly to antihistamine therapy or who are known to have urticaria in which the inflammatory infiltrate is neutrophil predominant may require the addition of colchicine (0.6 mg twice daily) or dapsone (50-150 mg once daily) to the treatment regimen (except patients with glucose-6-phosphate dehydrogenase [G-6-PD] deficiency). Patients with autoimmune urticaria may benefit from methotrexate or cyclosporine.[19, 20, 21] . Cyclosporine is only recommended for patients with severe disease refractory to high doses of oral antihistamines. Cyclosporine has a better risk-to-benefit ratio than systemic corticosteroids.[17]
Also see a clinical guideline summary from the British Association of Dermatologists, Guidelines for evaluation and management of urticaria in adults and children.[22] .
Consultations
A consultation with an allergist is recommended when the eliciting factor seems to be food sensitivity. The following clinical guideline summaries from the American College of Allergy, Asthma, & Immunology may be helpful:
Diet
Advise patients to avoid foods containing salicylate if they are allergic to salicylic acid. Additionally, advise patients with known food allergies to avoid those foods.
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