Celecoxib is a commonly used selective cyclooxygenase (COX)-2 inhibitor. Sporadic cases of hepatic or renal toxicity have been described with its use. All but three of these cases were reported with short-term use, typically a couple of days or weeks [1][2][3]. We report the first known case of late-onset celecoxib-induced hepato-nephrotoxicity, of which we obtained histological evidence.We present the case of a 56-year-old hypertensive man on ramipril 10 mg day -1 for >3 years who was prescribed celecoxib 200 mg one to two tablets per day for osteoarthritic pain.Baseline laboratory at the time of celecoxib prescription showed blood urea nitrogen (BUN) 16 mg dl(normal 35-110 U l -1 ) and total bilirubin (TBil) 0.5 mg dl -1 (normal 0.3-1.2 mg dl -1 ). He was a nondrinker and nonsmoker with no known risk factors for liver or renal disease.Ten months after prescription of celecoxib, the patient described intermittent right upper quadrant pain, fatigue, and decreased appetite. Over the course of two more months, his symptoms progressed to lethargy and jaundice, requiring hospitalization. He described having had progressively dark urine and pale stools for 2 weeks. His examination showed temperature 36.2°C, blood pressure 140/68 mmHg, pulse 80 per minute and respiration 20 per minute. There was scleral icterus, but no palmar erythema or spider angiomata. The neck was supple without lymphadenopathy.The heart was regular and lungs were clear. The abdomen was benign, without hepatosplenomegaly or ascites. There was no peripheral oedema. Laboratory tests on admission were haemoglobin 12.4 g dl -1 , white blood cells 16 000 ml -1 , platelets 283 000 ml -1 , prothrombin time 12.4 s, BUN 109 mg dl -1 , Cr 5.2 mg dl -1 , ALT 3 U l -1 , AST 17 U l -1 , ALK 77 U l -1 , TBil 32.4 mg dl -1 , direct bilirubin 28.7 mg dl -1 and albumin 4.1 g dl -1 . The antinuclear and hepatitis A IgM antibodies, hepatitis B surface antigen, hepatitis B core IgM antibodies, and hepatitis C antibodies were negative. Abdominal ultrasound and computed tomography were normal.Liver and renal biopsy specimens were obtained within 24 h of admission (Figure 1) and were suggestive of druginduced toxicity. Celecoxib was stopped, with ensuing rapid symptomatic and biochemical improvement. At 7 days, laboratory tests showed BUN 19 mg dl -1 , Cr 1.9 mg dl -1 and TBil 8.7 mg dl -1 , and the patient was discharged. At 6 weeks' follow-up, laboratory tests were BUN 7 mg dl -1 , Cr 1