Acute allergic reaction: Difference between revisions
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*Similar to [[Anaphylaxis]] but does not meet all the requirements (i.e. just skin manifestations) | *Similar to [[Anaphylaxis]] but does not meet all the requirements (i.e. just skin manifestations) | ||
==Clinical | ==Clinical Features== | ||
[[File:Hives2010.jpg|thumbnail|Raised urticaria]] | [[File:Hives2010.jpg|thumbnail|Raised urticaria]] | ||
*Presentation can be delayed | *Presentation can be delayed | ||
==Differential Diagnosis== | ==Differential Diagnosis== | ||
{{Template:Acute Allergic DDX}} | {{Template:Acute Allergic DDX}} | ||
== | ==Diagnosis== | ||
*Clinical | |||
==Management== | |||
*[[Antihistamines]] for pruritus | *[[Antihistamines]] for pruritus | ||
*[[Ranitidine]] has been found to improve urticaria but not angioedema at 2 hours<ref>Lin, RY et al. Improved Outcomes in Patients With Acute Allergic Syndromes Who Are Treated With Combined H1 and H2 Antagonists. Annals of Emergency Medicine. 36:5 NOVEMBER 2000.</ref> | *[[Ranitidine]] has been found to improve urticaria but not angioedema at 2 hours<ref>Lin, RY et al. Improved Outcomes in Patients With Acute Allergic Syndromes Who Are Treated With Combined H1 and H2 Antagonists. Annals of Emergency Medicine. 36:5 NOVEMBER 2000.</ref> | ||
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==Disposition== | ==Disposition== | ||
*Consider brief observation in the ED for improvement of symptoms | *Consider brief observation in the ED for improvement of symptoms | ||
== See Also == | |||
*[[Anaphylaxis]] | |||
==References== | ==References== | ||
<references/> | <references/> | ||
[[Category:Critical Care]] | [[Category:Critical Care]] | ||
[[Category:Derm]] | [[Category:Derm]] | ||
Revision as of 21:14, 23 May 2015
Background
- Similar to Anaphylaxis but does not meet all the requirements (i.e. just skin manifestations)
Clinical Features
- Presentation can be delayed
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
Diagnosis
- Clinical
Management
- Antihistamines for pruritus
- Ranitidine has been found to improve urticaria but not angioedema at 2 hours[1]
- Corticosteroids are of questionable efficacy
- Rule out Anaphylaxis
- Difficult to differentiate from Angioedema
Disposition
- Consider brief observation in the ED for improvement of symptoms
See Also
References
- ↑ Lin, RY et al. Improved Outcomes in Patients With Acute Allergic Syndromes Who Are Treated With Combined H1 and H2 Antagonists. Annals of Emergency Medicine. 36:5 NOVEMBER 2000.