Chronic urticaria: Difference between revisions
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==Differential Diagnosis== | ==Differential Diagnosis== | ||
{{Acute Allergic DDX}} | |||
==Evaluation== | ==Evaluation== | ||
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**[[Famotidine]] | **[[Famotidine]] | ||
*2nd line agents | *2nd line agents | ||
**[[Doxepin]] | **[[Doxepin]] <ref> Simons FE, et al; Histamine and H1-antihistamines: celebrating a century of progress. PMID: 22035879 </ref> | ||
**[[Mirtazapine]] | **[[Mirtazapine]] | ||
Revision as of 14:53, 1 August 2019
Background
- Recurrent urticaria at least twice per week for 6 weeks [1]
- Often autoimmune etiology
Clinical Features
- Urticaria
Differential Diagnosis
Acute allergic reaction
- Allergic reaction/urticaria
- Anaphylaxis
- Angioedema
- Anxiety attack
- Asthma exacerbation
- Carcinoid syndrome
- Cold urticaria
- Contrast induced allergic reaction
- Scombroid
- Shock
- Transfusion reaction
Evaluation
- Rule out anaphylaxis
- Identify any causative agents
Management
- H1/H2 blockers
- 2nd line agents
Disposition
- Discharge if no concern for anaphylaxis