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• W1460868102 abstract "Drug-induced liver injury (DILI) is a relatively infrequent form of adverse drug reaction, its incidence being between 1 : 1000 and 1 : 100 000; however, it accounts for approximately 10% of all cases of acute hepatitis, is the leading cause of acute liver failure, mainly due to acetaminophen overdose, and is the main reason for approved drug withdrawal from the market [1]. It is rarely predictable, in the majority of cases resulting from an idiosyncratic reaction, and some risk factors have been recognized (alcohol, diabetes, advanced age and female sex). Herein we describe a patient who developed DILI while taking telmisartan-hydrochlorothiazide.A 72-year-old woman was referred to our department with a 7-day history of weakness, anorexia, nausea, progressive jaundice, dark-coloured urine and pruritus. The patient had a past medical history of arterial hypertension, and had been taking lercanidipine for about 5 years; 4 weeks before admission she was prescribed telmisartan/hydrochlorothiazide because of uncontrolled blood pressure values. She denied blood transfusion, recent surgery, alcohol abuse and relevant family history. Physical examination showed a 2 cm hepatomegaly, other than jaundice. Laboratory testing on admission showed total serum bilirubin to be 15.6 mg/dl (range: 0–1), direct bilirubin 14.8 mg/dl, aspartate (AST) and alanine (ALT) transaminases 33 IU/l and 87 IU/l, respectively (range: 0–32), alkaline phosphatase (AP) 183 IU/l (range: 35–105), γ-glutamyl transpeptidase 552 IU/l (range: 5–36); complete blood count, serum albumin level and coagulation profile, serum iron and ferritin, amylase, copper and ceruloplasmin were normal. Anti-nuclear, anti-smooth muscle, anti-mitochondrial and anti-liver/kidney microsome antibodies as well as viral serologic markers (anti-HAV IgM, HBsAg, anti-HBc IgM, anti-HCV and HCV-RNA, anti-CMV and anti-EBV IgM and IgG) were all negative. An upper abdominal ultrasound and computed tomography revealed a scleroatrophic gallbladder with normal liver structure and intrahepatic bile ducts. A percutaneous liver biopsy was performed eight days after admission; liver histopathology showed mild mononuclear inflammatory infiltrates in portal tracts without hepatocyte necrosis. Drug-induced liver injury (DILI) was suspected and telmisartan/hydrochlorothiazide was stopped seven days after admission. Serum bilirubin remained substantially unchanged for the first ten days after discontinuation, then gradually began to decrease (Figure 1). Direct bilirubin at discharge (20 days after admission) was 10.3 mg/dl and returned to normal levels within the next 15 days.Figure 1Evolution of indirect bilirubin levelsTelmisartan is the angiotensin II receptor antagonist (ARB) with the highest affinity for the angiotensin II type 1 receptor and with the longest half-life. Furthermore, telmisartan acts as an agonist of peroxisome proliferator-activated receptor gamma (PPAR-γ): the consequent expression modulation of genes involved in carbohydrate and lipid metabolism could be the basis for possible metabolic effects of the drug [2]. A marketed combination, frequently used to enhance the antihypertensive effect of ARBs, is telmisartan plus hydrochlorothiazide, a diuretic drug which belongs to the thiazidic class.This patient was diagnosed with DILI on the basis of 1990 Consensus Meeting criteria [3]: the time to onset of jaundice from the beginning of drugs (25 days) was suggestive, the patient was female and more than 55 years old, alternative causes had been ruled out and the course of the reaction was highly suggestive (although rechallenge has not been performed for either drug). Acute DILI can have a varying pattern of expression [4]: hepatocellular, which mainly affects parenchymal cells; cholestatic, mainly affecting canalicular and/or ductular cells; and mixed cytotoxic/cholestatic. Our case fulfils the diagnostic criteria of cholestatic DILI [3]: although serum AP activity was not significantly increased, the ratio between serum ALT and serum AP activities was below 2. The patient did not report fever, chills or abdominal pain and liver histology showed only minimal inflammatory portal infiltrates: we can therefore more properly define our case as pure cholestasis, in contrast to the more common form of acute cholestatic hepatitis [5].ARB-induced cholestatic hepatitis has been reported only during treatment with irbesartan [6], while other forms of hepatotoxicity (hepatocellular, mixed) have been reported also with valsartan [7] and losartan [8, 9]. On the other hand, two cases of hydrochlorothiazide-related cholestatic injury have been reported in the literature [10, 11]. Although rare, an acute DILI should therefore be taken into account in the presence of acute hepatotoxicity with negative anamnestic and serological data in hypertensive patients treated with ARB and/or hydrochlorothiazide." @default.
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• W1460868102 date "2015-01-01" @default.
• W1460868102 modified "2023-09-26" @default.
• W1460868102 title "Letter to the Editor Telmisartan/hydrochlorothiazide-induced hepatotoxicity" @default.
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• W1460868102 doi "https://doi.org/10.5114/aoms.2015.53311" @default.
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