Drug rash: Difference between revisions
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*'''D'''rug reaction with eosinophilia and systemic symptoms [[DRESS syndrome|(DRESS) syndrome]] | *'''D'''rug reaction with eosinophilia and systemic symptoms [[DRESS syndrome|(DRESS) syndrome]] | ||
*'''S'''JS/[[TEN]] | *'''S'''JS/[[TEN]] | ||
{{Rash red flags}} | |||
==Clinical Features== | ==Clinical Features== | ||
*Sudden, usually morbilliform, often starts on face & trunk & spreads | [[File:Drugreaction.jpg|300px|thumb|Morbilliform drug eruption on back]] | ||
* Sudden, usually morbilliform, often starts on face & trunk & spreads | |||
* More polymorphous than viral exanthem | |||
==Differential Diagnosis== | ==Differential Diagnosis== | ||
{{ | {{Erythematous rash DDX}} | ||
{{Plaques DDX}} | |||
==Evaluation== | |||
*Typically a clinical diagnosis | |||
{{Table of severe drug reactions}} | |||
==Management== | ==Management== | ||
* Discontinue offending agent | |||
* Supportive | |||
* [[Topical steroids]] may help relieve pruritus | |||
==Disposition== | |||
*If no signs of [[anaphylaxis]] or significant sloughing, consider outpatient management | |||
==See Also== | ==See Also== | ||
*[[Rashes] | *[[Erythematous rash]] | ||
==External Links== | |||
*[http://www.emdocs.net/drug-rashes/ emDOCs - Drug Rashes: Not always so simple...] | |||
==References== | |||
<references/> | |||
[[Category:Dermatology]] | [[Category:Dermatology]] | ||
[[Category:Pharmacology]] | [[Category:Pharmacology]] |
Latest revision as of 20:59, 29 March 2023
Background
ABCs of Drug Rashes
- Acute generalized exanthematous pustulosis (AGEP)
- Bullous disease, drug induced
- Captopril (ACE-inhibitor) induced angioedema
- Drug reaction with eosinophilia and systemic symptoms (DRESS) syndrome
- SJS/TEN
Rash Red Flags[1]
- Fever
- Toxic appearance
- Hypotension
- Mucosal lesions
- Severe pain
- Very old or young age
- Immunosuppressed
- New medication
Clinical Features
- Sudden, usually morbilliform, often starts on face & trunk & spreads
- More polymorphous than viral exanthem
Differential Diagnosis
Erythematous rash
- Positive Nikolsky’s sign
- Febrile
- Staphylococcal scalded skin syndrome (children)
- Toxic epidermal necrolysis/SJS (adults)
- Afebrile
- Febrile
- Negative Nikolsky’s sign
- Febrile
- Afebrile
Plaques
- Psoriasis
- Bowen disease
- Discoid lupus erythematosus
- Drug eruption
- Erythema annulare centrifugum
- Lichen planus
- Lichen simplex chronicus
- Nummular dermatitis (nummular eczema)
- Parapsoriasis
- Pityriasis rosea
- Seborrheic dermatitis
Evaluation
- Typically a clinical diagnosis
Table of Severe Drug Rashes
Charateristic | DRESS | SJS/TEN | AGEP | Erythroderma |
Image | ||||
Onset of eruption | 2-6 weeks | 1-3 weeks | 48 hours | 1-3 weeks |
Duration of eruption (weeks) | Several | 1-3 | <1 | Several |
Fever | +++ | +++ | +++ | +++ |
Mucocutaneous features | Facial edema, morbilliform eruption, pustules, exfoliative dermattiis, tense bullae, possible target lesions | Bullae, atypical target lesions, mucocutaneous erosions | Facial edema, pustules, tense bullae, possible target lesions, possibl emucosal involvement | Erythematous plaques and edema affecting >90% of total skin surface with or without diffuse exfoliation |
Lymph node enlargement | +++ | - | + | + |
Neutrophils | Elevated | Decreased | Very elevated | Elevated |
Eosinophils | Very elevated | No change | Elevated | Elevated |
Atypical lymphocytes | + | - | - | + |
Hepatitis | +++ | ++ | ++ | - |
Other organ involvement | Interstitial nephritis, pneumonitis, myocarditis, and thydoiditis | Tubular nephritis and tracheobronical necrosis | Possible | Possible |
Histological pattern of skin | Perivascular lymphocytcic infiltrate | Epidermal necrosis | Subcorneal pustules | Nonspecific, unless reflecting Sezary syndrome or other lymphoma |
Lymph node histology | Lymphoid hyperplasia | - | - | No, unless reflecting Sezary syndrome or other malignancy |
Mortality (%) | 10 | 5-35 | 5 | 5-15 |
Management
- Discontinue offending agent
- Supportive
- Topical steroids may help relieve pruritus
Disposition
- If no signs of anaphylaxis or significant sloughing, consider outpatient management
See Also
External Links
References
- ↑ Nguyen T and Freedman J. Dermatologic Emergencies: Diagnosing and Managing Life-Threatening Rashes. Emergency Medicine Practice. September 2002 volume 4 no 9.