Severe Drug Reaction Severity Score (RegiSCAR)
Diagnoses Drug Reaction with Eosinophilia and Systemic Symptoms (DRESS) using RegiSCAR criteria. Score >=4 indicates definite DRESS.
Score interpretation
→ DRESS unlikely; consider alternative diagnosis; monitor drug reaction; review causative agent
→ Stop causative drug; specialist dermatology review; monitor FBC, LFTs, renal function, CXR; avoid re-exposure; consider systemic steroids if progressing
→ Emergency admission; stop causative drug immediately; systemic corticosteroids (prednisolone 1mg/kg/day); ophthalmology (eye involvement); dermatology, hepatology, nephrology involvement; ICU if multiorgan failure
Interpretation bands for the RegiSCAR (DRESS). Apply clinical judgement and local guidance.
References
Related
Curated clinical cross-links plus same-class fallbacks.
- Thalidomide (Rheumatology / Dermatology) · Immunomodulatory Drug (IMiD)
- Phenylephrine · Alpha-1 Adrenergic Agonist (Pure Vasoconstrictor)
- Methotrexate (Dermatology — Psoriasis) · Disease-Modifying Antirheumatic / Immunosuppressant
- Omalizumab (Dermatology — Chronic Urticaria) · Anti-IgE Monoclonal Antibody
- Apremilast (Dermatology) · Phosphodiesterase-4 (PDE4) Inhibitor
- Carbimazole · Antithyroid Drug
- Suspicious Pigmented Lesion — Melanoma Pathway · NICE NG14 2015 / BAD
- Cellulitis and Erysipelas · NICE NG141 2019 / CREST
- Psoriasis — Severity Assessment and Step-Up Therapy · NICE NG153 2019 / BAD
- Atopic Eczema — Assessment and Step-Up Therapy · NICE NG95 2023
- Urticaria and Angioedema · BSACI / EAACI Guidelines 2022
- Acne Vulgaris — Grading and Treatment · NICE NG198 2021 / BAD
Decision support only — verify against a current formulary, NICE, or your local guideline before clinical use.