DRESS syndrome with impaired renal function: case reportA 64-year-old woman developed DRSS syndrome with impaired renal function during treatment with trimetazidine for deteriorating angina.The woman presented to the dermatology unit a 2-week history of generalised redness, scaling and pruritus associated with fever. She had dilated cardiomyopathy and was on treatment with aspirin, carvedilol and torasemide [torsemide] for 10 years. Additionally, she had been receiving trimetazidine [route and dosage not stated] 6 weeks prior to the presentation in view of her deteriorating angina. On examination, she was febrile and had exfoliative dermatitis involving more than 90% of her body surface area, facial oedema, hemorrhagic crusting over her lips and oedema of the distal extremities. There was significant lymphadenopathy in the bilateral cervical and axillary regions but no palpable hepatosplenomegaly. On investigation, she had eosinophilia and impaired renal function. Serology for hepatitis B and C viruses was negative. Her total leukocyte count was 5600 /mm 3 and lymphocytes were 1800 /mm 3 with no atypical lymphocytes on peripheral smear. Complement levels and liver functions were normal, antinuclear antibody (ANA) was negative, urine examination was essentially normal and chest x-ray showed no abnormality. There was no history of pre-existing dermatoses, and her previous renal function tests, performed routinely every 6 months, showed no abnormality. A diagnosis of DRESS with renal involvement, possibly induced by trimetazidine, was considered.The woman received prednisolone along with fluid and electrolyte management, high protein diet, Condy's compresses and paraffin gauze dressings, and topical antibiotics over eroded surfaces. In view of the poor renal function, dialysis was performed on the day of admission and again on days 1 and 4 of admission. Because renal function deterioration had been acute, with normal documented renal function beforehand, and she was older and had multiple comorbidities, a renal biopsy was not attempted. Her skin condition started improving with discontinuation of the presumed culprit drug trimetazidine, whereas aspirin, carvedilol and torasemide were continued. Prednisolone was gradually tapered over 6 weeks of hospital stay. Her renal condition gradually improved over this time and normalised at the time of discharge.