DRESS Syndrome (Drug Reaction with Eosinophilia and Systemic Symptoms)
DRESS syndrome — Drug Reaction with Eosinophilia and Systemic Symptoms — is a rare, severe, life-threatening drug hypersensitivity reaction that sets itself apart from other drug reactions by its delayed onset, widespread organ involvement, and a characteristic interplay with human herpesvirus reactivation. Also called Drug-induced Hypersensitivity Syndrome (DiHS), DRESS can be fatal, and acute liver failure is the most commonly described cause of death; the prospective RegiSCAR study found mortality lower than earlier publications had suggested (two deaths among 117 validated cases). Unlike Stevens-Johnson Syndrome, DRESS does not cause epidermal necrosis or skin detachment; instead, the damage is systemic — liver, kidneys, lungs, heart — driven by drug-specific T-cell activation amplified by reactivating viruses including human herpesvirus 6 (HHV-6), Epstein-Barr virus (EBV), and cytomegalovirus (CMV). The delayed onset matters: in the RegiSCAR study the reaction began a median of 22 days after the drug was started (half of cases fell between day 17 and day 31), and patients frequently fail to connect a drug started weeks ago with the illness now in front of them.
- How DRESS Differs from Other Drug Reactions
- Causative Drugs and High-Risk Medications
- Pathophysiology: T-Cell Activation and Herpesvirus Reactivation
- Clinical Features: Rash, Facial Edema, Fever, and Visceral Involvement
- Diagnosis: RegiSCAR Criteria and Laboratory Workup
- Organ Involvement: Liver, Kidney, Lung, and Heart
- Treatment: Drug Withdrawal, Corticosteroids, and Prolonged Tapering
- Cross-Reactivity, Drug Avoidance, and Long-Term Follow-Up
- Key Research Papers
- Connections
How DRESS Differs from Other Drug Reactions
DRESS is a distinct clinical syndrome within the spectrum of severe cutaneous adverse reactions (SCARs). The four main SCARs — DRESS, Stevens-Johnson Syndrome (SJS), Toxic Epidermal Necrolysis (TEN), and Acute Generalized Exanthematous Pustulosis (AGEP) — differ in mechanism, causative drugs, timeline, and the type of tissue damage they cause. Recognizing the differences is a matter of clinical urgency because the management diverges sharply.
The key distinguishing features of DRESS are:
- No epidermal necrosis: Unlike SJS/TEN, DRESS does not cause the sheet-like skin detachment that defines those conditions. Skin in DRESS is inflamed, morbilliform, and edematous — but it does not slough.
- Prominent visceral involvement: Organ damage — especially hepatitis — is the central danger in DRESS, not skin loss as in SJS/TEN.
- Delayed onset of 2 to 8 weeks: Morbilliform drug rashes and urticaria typically appear within days. DRESS takes weeks because it requires expansion of drug-specific T-cell clones. This delay is why patients and physicians routinely fail to identify the responsible drug. In the prospective RegiSCAR registry, the median time from starting the drug was 22 days (interquartile range 17–31 days).
- Eosinophilia and atypical lymphocytosis: Peripheral blood eosinophilia above 1,500/µL and reactive atypical lymphocytes on the smear are laboratory hallmarks. These findings in a febrile patient with a morbilliform rash are a strong signal of DRESS.
- Herpesvirus reactivation: Reactivation of latent herpesviruses — particularly HHV-6 but also Epstein-Barr virus, cytomegalovirus, and human herpesvirus 7 (HHV-7) — is a defining biological feature of DRESS that is not seen in SJS/TEN or other drug reactions. The virus-drug immune interaction appears to amplify and perpetuate organ damage.
- Relapsing course after drug withdrawal: In SJS/TEN, stopping the causative drug is the pivotal intervention and outcomes improve rapidly. In DRESS, organ inflammation — especially hepatitis — can worsen or relapse for weeks to months after the drug is stopped, driven by ongoing viral immune activation. This protracted course surprises clinicians unfamiliar with DRESS.
Estimated incidence is 1 in 1,000 to 1 in 10,000 drug exposures for high-risk drugs. In the prospective RegiSCAR study of 117 validated cases, the reaction was drawn-out in all but two patients, two patients died during the acute phase, and the authors concluded that mortality was lower than earlier publications had suggested.
Causative Drugs and High-Risk Medications
Not all drugs cause DRESS equally. A relatively defined list of medications carries substantially elevated risk. Exposure to any of these drugs in a patient presenting with fever, rash, facial edema, lymphadenopathy, and eosinophilia points to the possibility of DRESS. In the prospective RegiSCAR study of 117 cases, antiepileptic (seizure) drugs were involved in 35%, allopurinol in 18%, sulfonamide antibiotics and dapsone in 12%, and other antibiotics in 11%.
Aromatic Anticonvulsants — Anticonvulsant Hypersensitivity Syndrome
Carbamazepine, phenytoin, lamotrigine, and phenobarbital are the most historically recognized DRESS-causative drugs. DRESS from these agents was previously called "anticonvulsant hypersensitivity syndrome" before the unified DRESS terminology was established. A critical clinical fact: aromatic anticonvulsants cross-react with each other in DRESS. A patient who develops DRESS on carbamazepine has approximately 40–80% cross-reactivity with phenytoin and phenobarbital. Lamotrigine cross-reacts less predictably but the risk remains. After DRESS from any aromatic anticonvulsant, the standard practice is that no drug in that class is used again, and a structurally unrelated antiepileptic is chosen instead, usually by a neurologist.
Allopurinol
Allopurinol — used for gout and hyperuricemia — is one of the most common causes of DRESS worldwide, particularly in Asia. The human leukocyte antigen-B*58:01 allele confers a dramatically increased risk of allopurinol-associated DRESS and Stevens-Johnson Syndrome in Han Chinese, Thai, Korean, and Vietnamese populations. The U.S. Food and Drug Administration (FDA) and multiple Asian national guidelines now recommend human leukocyte antigen-B*58:01 screening before initiating allopurinol in patients of Asian descent. The alternative, febuxostat, does not appear to share this human leukocyte antigen-associated risk.
Sulfonamides and Dapsone
Trimethoprim-sulfamethoxazole (TMP-SMX) is a leading sulfonamide cause of DRESS, particularly in human immunodeficiency virus-positive patients who have historically required high-dose TMP-SMX for Pneumocystis pneumonia prophylaxis. Dapsone — used for leprosy, dermatitis herpetiformis, and malaria prophylaxis — causes a well-described DRESS-like reaction called "dapsone syndrome" with hepatitis and methemoglobinemia as additional features.
Abacavir
The antiretroviral abacavir causes a systemic hypersensitivity reaction — clinically overlapping with DRESS — in patients carrying human leukocyte antigen-B*57:01. Abacavir hypersensitivity was historically fatal in some rechallenge cases. Prospective human leukocyte antigen-B*57:01 screening before prescribing abacavir has essentially eliminated abacavir hypersensitivity in screened populations and is now mandated internationally. This represents one of the earliest and most successful examples of pharmacogenomic screening preventing a severe drug reaction.
Vancomycin
Vancomycin-induced DRESS is increasingly recognized, particularly in patients receiving prolonged intravenous (IV) courses. It can co-occur with vancomycin-induced linear immunoglobulin A (IgA) bullous dermatosis, complicating the clinical picture. Teicoplanin, a related glycopeptide, has been described as an alternative in patients with vancomycin DRESS.
Minocycline
The tetracycline-class antibiotic minocycline — widely used for acne — causes a well-described DRESS syndrome with particular prominence of autoimmune features: positive antinuclear antibody (ANA), lupus-like serology, and hepatitis. Young women with prolonged minocycline use for acne are the typical affected population.
Checkpoint Inhibitors
Immune checkpoint inhibitors (PD-1 inhibitors: pembrolizumab, nivolumab; CTLA-4 inhibitors: ipilimumab) cause immune-related adverse events (irAEs) that can closely mimic DRESS, with eosinophilia, rash, hepatitis, and pneumonitis. Distinguishing true DRESS from checkpoint inhibitor irAEs is important because treatment differs (steroids are cornerstone in both, but drug rechallenge decisions differ fundamentally).
Pathophysiology: T-Cell Activation and Herpesvirus Reactivation
The pathophysiology of DRESS is more complex than a simple drug allergy. Three interacting mechanisms appear to work in concert:
Drug-Specific T-Cell Activation
The initiating event is activation of drug-specific cytotoxic CD8+ T cells and helper CD4+ T cells. The drug or its reactive metabolite is presented to T cells in association with human leukocyte antigen (HLA) molecules — either through direct binding to human leukocyte antigen (pharmacological interaction / p-i concept) or through covalent haptenation of self-proteins. T-cell clonal expansion takes 2–8 weeks, explaining the delayed onset. These activated T cells then infiltrate target organs — liver, kidney, lung, skin — and drive tissue damage through perforin/granzyme-mediated cytotoxicity and cytokine release (tumour necrosis factor-alpha (TNF-α), interferon-gamma (IFN-γ), interleukin-5 (IL-5) and interleukin-13 (IL-13)).
Eosinophil Recruitment
Interleukin-5 produced by activated T helper cells drives the characteristic eosinophilia. Eosinophils infiltrate tissues and release toxic granule proteins (major basic protein, eosinophil cationic protein) that directly damage hepatocytes, renal tubular cells, and myocardium. The degree of eosinophilia correlates imperfectly with organ damage severity — some patients with severe hepatitis have only mild eosinophilia, and vice versa.
Herpesvirus Reactivation — The Distinguishing Feature
During the course of DRESS, latent herpesviruses — primarily HHV-6 (human herpesvirus 6, which infects nearly 100% of humans by age 2 and persists latently in mononuclear cells) but also Epstein-Barr virus, cytomegalovirus, and HHV-7 — reactivate sequentially. HHV-6 reactivation typically occurs 2–4 weeks after DRESS onset. The reactivating virus provides additional antigenic stimulation, recruits more immune effectors, and may directly infect organ-specific cells (hepatocytes, cardiac myocytes). This herpesvirus-drug immune interaction creates a feed-forward cycle that explains why DRESS continues to worsen — and can relapse — long after the causative drug is stopped. The sequential pattern of viral reactivation (HHV-6 first, then Epstein-Barr virus or cytomegalovirus) has been documented in Japanese series and has diagnostic and therapeutic implications: serial HHV-6 polymerase chain reaction (PCR) titers track DRESS activity and may inform treatment decisions regarding antiviral therapy.
A 2019 study built a severity score from the records of 55 patients with DRESS. A score of 4 or more was linked to later cytomegalovirus disease and other complications, while no patient scoring under 4 developed complications. It was a single-hospital study with no separate group of patients to confirm the score, and the authors suggested that early anti-cytomegalovirus treatment be considered at scores of 4 or more or when cytomegalovirus reactivation is found.
The human leukocyte antigen associations observed in DRESS (HLA-B*58:01 in allopurinol DRESS; HLA-A*31:01 in carbamazepine DRESS in Europeans; human leukocyte antigen-B*57:01 in abacavir hypersensitivity) reflect the specific human leukocyte antigen-drug-peptide binding that enables T-cell activation, explaining why DRESS is not a universal response to these drugs but is highly predictable in genetically susceptible individuals.
Clinical Features: Rash, Facial Edema, Fever, and Visceral Involvement
DRESS typically unfolds over days to weeks after a latency period of 2–8 weeks from the start of the causative drug. The clinical presentation integrates cutaneous, systemic, and laboratory findings:
Fever
High fever — 38.5 to 40°C — is typically the first sign and often precedes the rash by several days. The fever is sustained and does not resolve without drug withdrawal and treatment. In the context of a new drug started weeks prior, unexplained high fever raises the possibility of DRESS.
Skin Eruption
The rash begins as a morbilliform (maculopapular) eruption on the face and upper trunk, spreading centrifugally to involve more than 50% of body surface area. The eruption is confluent, erythematous, and may become edematous. Importantly, the skin does not blister or peel in sheets — this absence of epidermal detachment distinguishes DRESS from SJS/TEN. Some patients develop follicular accentuation, purpuric components, or vesicles, but Nikolsky sign is negative. Exfoliative dermatitis (generalized skin scaling) may develop in severe or prolonged cases.
Facial Edema
Periorbital and facial puffiness — often described as a "puffy face" or "swollen face" appearance — is a characteristic and clinically distinctive feature of DRESS that is rarely emphasized in textbooks but is highly recognizable to experienced clinicians. The edema is non-pitting and involves the periorbital region, cheeks, and lips. Patients look systemically ill and puffy, quite different from the usual morbilliform drug rash in an otherwise well-appearing patient.
Lymphadenopathy
Generalized lymphadenopathy — enlarged, tender lymph nodes in cervical, axillary, and inguinal chains — was present in 54% of cases in the prospective RegiSCAR study. Lymph node biopsy, if performed, shows reactive hyperplasia with immunoblasts and eosinophils; biopsy is rarely needed for diagnosis but may be obtained to exclude lymphoma.
Mucosal Involvement
Unlike SJS/TEN where extensive mucosal erosions are a hallmark, mucosal involvement in DRESS is mild when present (the RegiSCAR study found mild mucosal involvement in 56% of cases): mild oral erosions, cheilitis, or pharyngeal erythema. Extensive mucosal blistering points toward SJS/TEN rather than DRESS.
The Relapsing-Remitting Course
A clinically puzzling and dangerous feature of DRESS is its tendency to worsen or relapse after drug withdrawal, sometimes for weeks to months. Liver enzymes that were improving may spike again. New organ involvement (renal, pulmonary) can emerge after the initial cutaneous eruption resolves. This relapsing course is attributed to ongoing herpesvirus-driven immune activation that persists after the triggering drug is gone.
Diagnosis: RegiSCAR Criteria and Laboratory Workup
No single diagnostic test confirms DRESS. Diagnosis is clinical and requires integration of history, physical examination, and laboratory findings. The RegiSCAR scoring system provides a validated framework:
RegiSCAR Criteria for Probable or Definite DRESS
All of the following must be present: hospitalization + suspected drug reaction + acute skin rash. Plus at least three of the following five criteria:
- Fever above 38.5°C
- Enlarged lymph nodes in at least two sites
- Involvement of at least one internal organ (liver, kidney, lung, heart)
- Blood count abnormalities: eosinophilia (above 1,500/µL or above 10%), atypical lymphocytes, lymphopenia or lymphocytosis
- Skin rash extending beyond 50% body surface area, or characterized by at least two of: facial edema, purpura, exfoliation, or skin biopsy showing features compatible with DRESS
A score of 4 = "probable DRESS"; 5 or 6 = "definite DRESS."
Laboratory Workup
- Complete blood count with differential: eosinophil count (must be manually counted, not just flagged), atypical lymphocyte percentage
- Comprehensive metabolic panel: aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase, bilirubin (hepatitis); creatinine, blood urea nitrogen (BUN) (nephritis)
- Troponin and echocardiogram: if cardiac DRESS is suspected (myocarditis, pericarditis); DRESS myocarditis can be fatal and is underdiagnosed
- Chest imaging: chest X-ray or computed tomography (CT) if pulmonary symptoms (pneumonitis, pleural effusion)
- HHV-6 immunoglobulin M (IgM) and polymerase chain reaction: HHV-6 immunoglobulin M titer elevation and high HHV-6 polymerase chain reaction copy numbers in blood confirm active reactivation; serial HHV-6 polymerase chain reaction useful for monitoring treatment response; Epstein-Barr virus and cytomegalovirus serology/polymerase chain reaction also checked
- Skin biopsy: perilesional biopsy shows dense superficial and deep perivascular dermal infiltrate with eosinophils, atypical lymphocytes, and vacuolar interface change; biopsy features support but do not confirm DRESS, and help exclude SJS (full-thickness epidermal necrosis)
- Human leukocyte antigen typing: in appropriate ethnic populations when allopurinol or carbamazepine are the suspected culprits; confirms pharmacogenomic susceptibility but does not change acute management
Organ Involvement: Liver, Kidney, Lung, and Heart
Visceral involvement in DRESS is what kills. Identifying which organs are affected guides severity assessment and treatment intensity:
Hepatitis (Most Common — Present in 50–80%)
Hepatic involvement ranges from asymptomatic transaminase elevation to fulminant hepatic failure. Transaminases (aspartate aminotransferase, alanine aminotransferase) commonly reach 5–20 times the upper limit of normal; values above 20-fold elevation signal severe hepatitis. Cholestatic patterns (alkaline phosphatase, bilirubin elevation) occur less commonly. Drug-induced autoimmune hepatitis — a prolonged autoimmune hepatitis persisting after DRESS resolution — can follow DRESS, particularly in HHV-6-associated cases, requiring months of immunosuppressive treatment after the acute episode. Liver failure is the principal cause of DRESS-related death; steadily rising bilirubin (progressive hyperbilirubinemia) and clotting problems (coagulopathy, with international normalized ratio (INR) elevation) are signs of liver failure that hospitals treat as urgent, with liver specialist (hepatology) care and intensive care unit-level monitoring.
Nephritis
Interstitial nephritis (tubulointerstitial nephritis with eosinophilic infiltrate on biopsy) occurs in 10–30% of DRESS cases. Rising creatinine and proteinuria are the early signals. Urinalysis may show eosinophiluria, though this finding has low sensitivity. Most cases of DRESS nephritis respond to corticosteroids; a minority develop chronic kidney disease requiring prolonged immunosuppression or, rarely, dialysis.
Pneumonitis
Pulmonary DRESS manifests as interstitial pneumonitis with bilateral ground-glass infiltrates on computed tomography, hypoxemia, and dry cough. Eosinophilic pneumonia pattern may be seen on bronchoalveolar lavage. Severe cases require supplemental oxygen; mechanical ventilation is rarely necessary. Pulmonary involvement is more common with minocycline DRESS and dapsone DRESS than with anticonvulsant-associated cases.
Myocarditis and Pericarditis
Cardiac DRESS is the rarest but most acutely lethal organ involvement. Eosinophilic myocarditis can cause rapid-onset heart failure, arrhythmia, or cardiogenic shock. Troponin elevation in the context of DRESS is treated as urgent, with prompt echocardiography and cardiology consultation. HHV-6 myocarditis may co-occur with drug-induced eosinophilic myocarditis, compounding the injury. Endomyocardial biopsy showing eosinophilic infiltrate confirms the diagnosis but is rarely performed acutely given procedural risk. High-dose corticosteroids are the treatment; intravenous immunoglobulin (IVIG) and plasmapheresis have been used in refractory cases.
Treatment: Drug Withdrawal, Corticosteroids, and Prolonged Tapering
Management of DRESS requires prompt recognition, immediate drug withdrawal, organ-targeted supportive care, and immunosuppression. The severity of organ involvement determines treatment intensity:
Step 1 — Immediate Drug Withdrawal
Stopping the causative drug immediately is the single most important intervention. Early drug withdrawal — within 48 hours of recognizing DRESS — is associated with shorter disease course and lower organ injury severity. However, because DRESS continues its course after drug withdrawal (driven by viral reactivation), stopping the drug alone is rarely sufficient treatment for moderate-to-severe cases.
Step 2 — Identifying and Stopping Non-Essential Drugs
Many DRESS patients are on polypharmacy. Any drug started within the past 8 weeks that is not immediately life-sustaining is treated as a suspect and stopped or substituted. In ambiguous cases with multiple candidate drugs, all are stopped if clinically feasible.
Step 3 — Systemic Corticosteroids
Systemic corticosteroids are the mainstay of DRESS treatment. Prednisone 0.5–2 mg/kg/day (or equivalent intravenous methylprednisolone in severe or hospitalized cases) reduces organ inflammation, suppresses eosinophilia, and attenuates the T-cell-driven tissue damage. Most patients show significant clinical improvement — fever breaks, rash fades, transaminases fall — within 1–2 weeks of starting corticosteroids.
A critical caution: corticosteroids may increase the risk of herpesvirus reactivation or replication. Some experts delay steroids until HHV-6 serology and polymerase chain reaction results are available; others start steroids empirically in severe cases while awaiting viral testing. There is no consensus on this question. The balance of evidence favors early corticosteroids in organ-threatening DRESS despite the theoretical viral risk.
Steroid Creams Compared with Steroid Pills and Infusions
A 2023 study from a Singapore hospital reviewed 94 people with DRESS: 41 were treated with steroid creams (topical corticosteroids) and 53 with steroid pills or infusions (systemic corticosteroids). Deaths at one and 12 months, length of hospital stay, flares of DRESS and viral reactivation were similar in the two groups, while infections were more common in the systemic-steroid group (32.1% vs 12.2%). A meta-analysis of six studies (292 people) in the same paper found no significant difference in deaths or length of stay. The study looked back at records rather than assigning treatments, so sicker patients may have been more likely to receive systemic steroids. The authors concluded that topical corticosteroids may be a safe and effective alternative in mild-to-moderate DRESS.
Step 4 — Prolonged Taper (8 to 12 Weeks Minimum)
This is where DRESS management most often goes wrong. Rapid steroid tapering — finishing a 2-week prednisone course as one might for poison ivy or a morbilliform rash — reliably triggers DRESS relapse. The relapse manifests as re-elevation of liver enzymes, return of fever and rash, or new organ involvement. The taper is kept slow — typically 2–3 months — with the dose held or reversed at the first sign of relapse. DRESS is not a short-course disease.
Antiviral Therapy for HHV-6
When HHV-6 polymerase chain reaction titers are high and organ damage is progressive despite corticosteroids, some experts add antiviral therapy targeting HHV-6. Ganciclovir (intravenous) or valganciclovir (oral) are active against HHV-6, though clinical trial evidence is limited to case series and retrospective analyses from Japan. The decision to add antivirals is made case-by-case in severe DRESS with documented high HHV-6 replication.
Newer Treatments for Steroid-Resistant DRESS
In a 2020 case report in Nature Medicine, researchers ran single-cell gene-activity analysis (single-cell RNA sequencing) on skin and blood from one patient whose DRESS did not respond to steroids. It pointed to the JAK-STAT signalling pathway, and treatment with the JAK-inhibitor drug tofacitinib brought the disease under control and allowed other immune-suppressing drugs to be tapered. In a 2026 proof-of-concept study from China, four patients with severe DRESS-related liver injury that kept worsening despite steroids were given oral tofacitinib; their liver tests returned to or near normal in a median of 48 days, and no severe side effects occurred over a median follow-up of 274 days. These are very small numbers — one patient and four patients.
Supportive Care
Hospitalization is required for moderate-to-severe DRESS. IV fluid resuscitation for dehydration from fever and poor oral intake; standard wound care for the skin eruption (moisturizers, non-irritating topical agents; no corticosteroid creams needed as systemic steroids address the skin); close monitoring of renal function, liver enzymes, and complete blood count during treatment; ophthalmology consultation if eye involvement (usually mild in DRESS); nutrition support if oral intake is compromised.
Cross-Reactivity, Drug Avoidance, and Long-Term Follow-Up
Surviving DRESS carries lasting implications that require careful long-term management:
Drug Avoidance for Life
The causative drug is avoided permanently. Rechallenge with the inciting drug is absolutely contraindicated and can cause a rapid, severe, and fatal recurrence. Standard practice is to give patients written documentation of the reaction and the specific drug involved.
Cross-Reactivity Within Drug Classes
Cross-reactivity between structurally related drugs is clinically important. Aromatic anticonvulsants (carbamazepine, phenytoin, phenobarbital) cross-react at rates of 40–80%; after DRESS from any one of them, all are generally treated as off-limits. Lamotrigine cross-reactivity is less certain but real. Non-aromatic anticonvulsants (valproate, levetiracetam, gabapentin, pregabalin, topiramate) are structurally distinct and do not cross-react — they are the alternatives after anticonvulsant-associated DRESS. Sulfonamide cross-reactivity exists between sulfonamide antibiotics but generally not between sulfonamide antibiotics and sulfonamide non-antibiotics (furosemide, thiazides).
Medical Alert Identification
A medical alert bracelet or allergy card listing the causative drug and drug class lets emergency physicians know about the reaction before prescribing anticonvulsants for new-onset seizures or antibiotics for acute infections.
Autoimmune Sequelae
DRESS survivors have an elevated risk of developing de novo autoimmune diseases — autoimmune thyroiditis, autoimmune hepatitis, type 1 diabetes, lupus-like syndromes — months to years after the acute DRESS episode. This autoimmune diathesis is thought to reflect bystander immune activation during the herpesvirus reactivation phase that breaks self-tolerance. Because of this risk, long-term follow-up with thyroid function tests, autoimmune screening, and liver function monitoring is part of DRESS aftercare, particularly for survivors with documented HHV-6 reactivation.
Pharmacogenomic Testing for Future Drug Prescriptions
After DRESS, pharmacogenomic testing (human leukocyte antigen typing) can be offered to the patient and to first-degree relatives who may need the same drug class. Carriers of human leukocyte antigen-B*58:01 who have never received allopurinol are typically given febuxostat as an alternative, and carriers of human leukocyte antigen-A*31:01 of European descent who need an anticonvulsant are typically given a non-aromatic one. This testing aims to prevent DRESS in other members of the family.
Key Research Papers
- Bocquet H, Bagot M, Roujeau JC. Drug-induced pseudolymphoma and drug hypersensitivity syndrome (Drug Rash with Eosinophilia and Systemic Symptoms: DRESS). Semin Cutan Med Surg. 1996;15(4):250–257. — PubMed PMID: 9069593
- Cacoub P, Musette P, Descamps V, et al. The DRESS syndrome: a literature review. Am J Med. 2011;124(7):588–597. — PubMed PMID: 21592453
- Kardaun SH, Sekula P, Valeyrie-Allanore L, et al. Drug reaction with eosinophilia and systemic symptoms (DRESS): an original multisystem adverse drug reaction. Results from the prospective RegiSCAR study. Br J Dermatol. 2013;169(5):1071–1080. — PubMed PMID: 23855313
- Shiohara T, Inaoka M, Kano Y. Drug-induced hypersensitivity syndrome (DIHS): a reaction induced by a complex interplay among herpesviruses and antiviral and antidrug immune responses. Allergol Int. 2006;55(1):1–8. — PubMed PMID: 17075280
- Descamps V, Valance A, Edlinger C, et al. Association of human herpesvirus 6 infection with drug reaction with eosinophilia and systemic symptoms. Arch Dermatol. 2001;137(3):301–304. — PubMed PMID: 11255328
- Tassaneeyakul W, Jantararoungtong T, Chen P, et al. Strong association between HLA-B*5801 and allopurinol-induced Stevens-Johnson syndrome and toxic epidermal necrolysis in a Thai population. Pharmacogenet Genomics. 2009;19(9):704–709. — PubMed PMID: 19696695
- Mallal S, Phillips E, Carosi G, et al. HLA-B*5701 screening for hypersensitivity to abacavir. N Engl J Med. 2008;358(6):568–579. — PubMed PMID: 18256392
- Blumenthal KG, Youngster I, Rabideau DJ, et al. Peripheral blood eosinophilia and hypersensitivity reactions among patients receiving outpatient parenteral antibiotics. J Allergy Clin Immunol. 2015;136(5):1288–1294. — PubMed PMID: 25981739
- Walsh SA, Creamer D. Drug reaction with eosinophilia and systemic symptoms (DRESS): a clinical update and review of current thinking. Clin Exp Dermatol. 2011;36(1):6–11. — PubMed PMID: 21143513
- Chen YC, Chiu HC, Chu CY. Drug reaction with eosinophilia and systemic symptoms: a retrospective study of 60 cases. Arch Dermatol. 2010;146(12):1373–1379. — PubMed PMID: 20713773
- Fiszenson-Albala F, Auzerie V, Mahe E, et al. A 6-month prospective survey of cutaneous drug reactions in a hospital setting. Br J Dermatol. 2003;149(5):1018–1022. — PubMed PMID: 14632808
- Husain Z, Reddy BY, Schwartz RA. DRESS syndrome: Part I. Clinical perspectives. J Am Acad Dermatol. 2013;68(5):693.e1–14. — PubMed PMID: 23602182
- Mizukawa Y, Hirahara K, Kano Y, Shiohara T. Drug-induced hypersensitivity syndrome/drug reaction with eosinophilia and systemic symptoms severity score: A useful tool for assessing disease severity and predicting fatal cytomegalovirus disease. J Am Acad Dermatol. 2019;80(3):670–678.e2. — PubMed PMID: 30240780
- Kim D, Kobayashi T, Voisin B, et al. Targeted therapy guided by single-cell transcriptomic analysis in drug-induced hypersensitivity syndrome: a case report. Nat Med. 2020;26(2):236–243. — PubMed PMID: 31959990
- Lian BS, Ha JH, Sultana R, et al. Systemic versus topical corticosteroids in the treatment of DRESS: a retrospective cohort study followed by a meta-analysis. Am J Clin Dermatol. 2023;24(4):637–647. — PubMed PMID: 37133714
- Gu J, Wang Y, Wang X, et al. Tofacitinib rescue for refractory drug-induced liver injury with severe DRESS: a prospective proof-of-concept study. Liver Int. 2026;46(4):e70578. — PubMed PMID: 41823050
Connections
- Dermatology
- Stevens-Johnson Syndrome — the other major severe drug-induced skin reaction; SJS/TEN causes epidermal necrosis (skin peels off), whereas DRESS causes organ damage without epidermal detachment; distinguished by timeline, skin findings, and organ pattern
- Urticaria — common allergic drug rash; hives resolve within hours to days of drug withdrawal; does not cause organ involvement or eosinophilia; distinguished from DRESS by timeline and severity
- Contact Dermatitis — localized T-cell-mediated skin reaction to topical allergens; shares immunological mechanism (delayed hypersensitivity) with DRESS but is localized, not systemic, and does not involve herpesviruses
- Lichen Planus — T-cell-mediated inflammatory skin and mucosal disease; drug-induced lichen planus (lichenoid drug reaction) can mimic DRESS cutaneous features; distinguished by absence of eosinophilia and systemic organ involvement
- Pemphigus Vulgaris — autoimmune blistering disease; drug-induced pemphigus (from thiol drugs, angiotensin-converting enzyme inhibitors (ACE inhibitors)) can complicate differential; in pemphigus, blistering and positive Nikolsky sign are present, eosinophilia and fever are absent
- Eczema (Atopic Dermatitis) — chronic inflammatory skin disease with eosinophilia; eosinophilia shared with DRESS but eczema is chronic, not drug-triggered, without systemic organ involvement or fever