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DRUG RECORD

 

NAPROXEN

OVERVIEW
Naproxen

 

Introduction
Naproxen is a popular over-the-counter nonsteroidal antiinflammatory drug (NSAID) that is widely used for therapy of mild-to-moderate pain and arthritis.  Naproxen has been associated with rare cases of clinically apparent drug induced liver injury.

Background
Naproxen (na prox' en) belongs to the propionic acid class of NSAIDs similar to fenoprofen, ibuprofen, ketoprofen and oxaprozin.  The antiinflammatory and analgesic properties of NSAIDs such as naproxen are mediated by inhibition of tissue cyclo-oxygenases (Cox-1 and -2), which results in a decrease in pro-inflammatory prostaglandins, important mediators in inflammatory and pain pathways.  Naproxen has analgesic as well as antipyretic and antiinflammatory activity.  It has a longer half-life than other commonly used NSAIDs, making a twice daily regimen feasible.  Naproxen was approved for use by prescription in the United States in 1976 and for over-the-counter use in 1994.  Currently more than 10 million prescriptions for naproxen are filled yearly and these numbers do not capture the wide scale over-the-counter sales.  Naproxen is indicated for mild-to-moderate pain from various causes including trauma, tendonitis, headache, dysmenorrhea, and various forms of arthritis including osteoarthritis, rheumatoid arthritis, gout and ankylosing spondylitis.  Generic and over-the-counter formulations are available in multiple doses (125, 250, 225, 375, 500, 550 mg) under multiple commercial names including: Aleve, Anaprox, Naprosyn, Naxen, Naxodol, Neo-Prox, Nu-Naprox, Nycopren, Proxen, Synflex.  Over-the-counter combinations with antihistamines are also available.  The typical dose is 250 to 500 mg taken orally twice daily.  As with other NSAIDs, naproxen is generally well tolerated, but side effects can include headache, dizziness, somnolence, dyspepsia, nausea, abdominal discomfort, heartburn, peripheral edema and hypersensitivity reactions.

Hepatotoxicity
Serum aminotransferase levels can be elevated in as many as 4% of patients receiving prolonged courses of naproxen, particularly with high doses.  Clinically apparent naproxen induced liver injury is very rare (~1-3 per 100,000 users), but convincing cases have been reported that resemble acute hepatitis and arise within 1 to 6 weeks of starting naproxen (Cases 1 and 2).  The time to onset can be as long as 12 weeks, but convincing instances of liver injury arising after long term use have not been described.  The pattern of serum enzyme elevations has ranged from hepatocellular to cholestatic injury.  Immunoallergic features and autoantibodies are not common.  In most instances, recovery is rapid once naproxen is stopped.  Rare instances of acute liver failure attributed to naproxen have been published, but the role of naproxen in these cases was not very convincingly shown.

Mechanism of Injury
The mechanism of hepatotoxicity from naproxen is not known, but it is metabolized by the cytochrome P450 system and idiosyncratic injury may be due to a toxic metabolite.  Cross sensitivity to hepatic injury with fenoprofen suggests that the propionic acid may be responsible for the injury.

Outcome and Management
Severity ranges from transient, asymptomatic elevations in serum aminotransferase levels, to hepatitis with jaundice, to fulminant liver failure leading to death or need for liver transplantation.  In most cases, complete recovery is expected promptly after stopping the drug.  Cross reactivity with other propionic acid derivatives, such as fenoprofen, has been reported, and should thus be considered when switching the patient to an alternate NSAID or analgesic.

Drug Class:  Nonsteroidal Antiinflammatory Drugs

 

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CASE REPORTS
Naproxen

 

Case 1.  Acute hepatitis due to naproxen.
[Modified from: Andrejak M, Davion T, Gineston JL, Capron JP. Cross hepatotoxicity between non-steroidal anti-inflammatory drugs. Br Med J 1987; 295: 180-1. PubMed Citation]

 

A 57 year old woman was started on naproxen (500 mg daily) for arthritis and ten days later developed nausea, abdominal pain and weakness, followed a few days later by jaundice.  She had no previous history of liver disease, had no risk factors for viral hepatitis and did not drink alcohol.  She was not taking other medications and had no history of adverse drug reactions.  Blood tests showed bilirubin of 4.6 mg/dL with elevations in both ALT and alkaline phosphatase (Table).  Tests for acute hepatitis A and B and for serum autoantibodies were negative.  Abdominal ultrasound and ERCP showed no evidence of biliary obstruction.  A liver biopsy showed acute hepatocellular necrosis.  Naproxen was stopped, and she recovered rapidly.  Approximately 2 months later, she was started on fenoprofen for recurrence of her arthritic pains.  Within five days she developed nausea, abdominal pain and fatigue and liver tests were abnormal.  She recovered uneventfully after stopping fenoprofen.


Key Points

Medication:Naproxen (500 mg daily for 14 days)
Pattern: Hepatocellular (R=15)
Severity: 3+ (hospitalized with jaundice)
Latency: 7 days to symptoms, 10 to onset of jaundice
Recovery:One to two months
Other medications:None

Laboratory Values

Days After Starting Days After Stopping ALT* (U/L) Alk P* (U/L) Bilirubin (mg/dL) Other
0 Naproxen given for 14 days
10 0 450
19 0 500 280 4.6 Admission: GGT 349
31 12 160 205
36 17 40 190 Discharged
72 43 Fenoprofen started
6 0 300 320 Fenoprofen stopped
27 21 180 240
90 84 25 160
Normal Values <20 <170 <1.2

* Estimated from figure.

 

Comment

A striking and convincing example of a acute hepatitis caused by naproxen with a latency of only one week and rapid improvement with stopping the medication.  Exposure to fenoprofen, a class-related NSAID, led to rapid recurrence with a similar pattern of serum enzyme elevations.  The propionic acid derivative class of NSAIDs include ibuprofen, naproxen, fenoprofen and oxaprozin.

 

Case 2.  Acute hepatocellular injury and jaundice after a single dose of naproxen.
[Modified from: Demirag MD, Ozenirler S, Goker B, Poyraz A, Haznedaroglu S, Ozturk MA. Idiosyncratic toxic hepatitis secondary to single dose of naproxen. Acta Gastroenterol Belg 2007; 70: 247-8. PubMed Citation]

 

A 57 year old woman took a single dose of naproxen for abdominal pain and six days later developed generalized itching and jaundice.  On admission to the hospital 4 days later, she was jaundiced but had no fever, rash or eosinophilia.  Blood tests showed bilirubin of 22 mg/dL with marked elevations in ALT and minimal increases in alkaline phosphatase levels (Table).  She tested positive for antibody to hepatitis A, but an IgM assay was evidently not done.  Tests for hepatitis B and C (including HCV RNA), CMV and EBV were negative as were relevant autoantibodies.  Ultrasound and CT scans of the abdomen were unremarkable.  Liver biopsy showed intrahepatic cholestasis and variable degrees of hepatocellular necrosis.  She recovered slowly, but completely over the next five months.

 

Key Points

Medication:Naproxen (one tablet, unknown amount)
Pattern: Hepatocellular (R= 30)
Severity: 3+ (hospitalized with jaundice)
Latency: 6 days to symptoms and jaundice
Recovery:Five months
Other medications:None mentioned

Laboratory Values

Weeks After Starting Weeks After Stopping ALT (U/L) Alk P (U/L) Bilirubin (mg/dL) Other
0 One dose of naproxen taken
1 1 2023 80 22 Admission
2 2 1549 58 32 Liver biopsy
3 3 622 65 37
11 11 183 72 1.4
15 15 97 47 0.6
21 21 17 17 0.7
Normal Values <70 <100 <1.2

Comment

A remarkable case of acute hepatocellular jaundice arising within a week of taking a single tablet of naproxen.  The case report provides little information about past medical history of possible exposures to viral hepatitis or other toxins, and serological tests were incomplete to rule out acute hepatitis A.  Typical of naproxen induced liver injury was the short incubation period and the ultimate resolution of the hepatitis with no further exposure.  However, the naproxen may have been co-incidental or actually taken to treat initial symptoms of an unrelated acute hepatic injury.  Nevertheless, naproxen has been clearly implicated in a number of cases of acute hepatocellular injury and rechallenge would be foolhardy.  The patient should be advised to avoid most other NSAIDs of the propionic class.

 

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PRODUCT INFORMATION
Naproxen

 

REPRESENTATIVE TRADE NAMES
Naproxen – Generic, Aleve®, Anaprox®, Naprosyn®

 

DRUG CLASS
Nonsteroidal Antiinflammatory Drugs

 

COMPLETE LABELING

Product labeling at DailyMed, National Library of Medicine, NIH

 

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DRUG CAS REGISTRY NUMBER MOLECULAR FORMULA STRUCTURE
Naproxen 22204-53-1 C14-H14-O3 Naproxen chemical structure

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References updated: 30 January 2014

  1. Zimmerman HJ. Drugs used to treat rheumatic and musculospastic disease. The NSAIDS. In, Zimmerman HJ. Hepatotoxicity: the adverse effects of drugs and other chemicals on the liver. 2nd ed. Philadelphia: Lippincott, 1999, pp. 517-41.  (Review of hepatotoxicity of NSAIDs published in 1999 mentions that the variable onset of injury and scanty data on specific cases make it difficult to assign causality or a specific mechanism of hepatic injury from naproxen).

  2. Lewis JH, Stine JG. Nonsteroidal anti-inflammatory drugs and leukotriene receptor antagonists: pathology and clinical presentation of hepatotoxicity. In, Kaplowitz N, DeLeve LD, eds. Drug-induced liver disease. 3rd Edition. Amsterdam: Elsevier, 2013. pp. 370-402.  (Expert review of hepatotoxicity of NSAIDs mentions that only a few cases of hepatic injury due to naproxen have been reported and the clinical features and possible pathogenesis are not well defined).

  3. Grossner T, Smyth EM, Fitzgerald GA.  Anti-inflammatory, antipyretic, and analgesic agents:  pharmacotherapy of gout.  In, Brunton LL, Chabner BA, Knollman BC. Goodman & Gilman’s The pharmacological basis of therapeutics, 12th ed. New York: McGraw-Hill, 2011. p. 959-1004.  (Textbook of pharmacology and therapeutics).

  4. Frenger W, Morbach HJ. [Clinical trial with naproxen, with particular consideration to tolerance] Scand J Rheumatol 1973; Suppl 2: 137-9. German. PubMed Citation  (Experience in 50 patients with arthritis given naproxen for 28 days; 3 patients had minimal ALT elevations, 16-20 mU).

  5. Bass BH. Letter: Jaundice associated with naproxen. Lancet 1974; 1: 998. PubMed Citation  (35 year old woman developed jaundice [bilirubin 3.1 mg/dL, Alk P ~10x elevated, AST normal] 2-3 months after starting naproxen which resolved upon stopping).

  6. Law IP, Knight H. Jaundice associated with naproxen. N Engl J Med 1976; 295: 1201. PubMed Citation  (54 year old woman developed jaundice [bilirubin 2.5 mg/dL; AST 1000 U/L, Alk P 400 U/L] 1 week after starting naproxen, resolving within 4 weeks).

  7. Krogsgaard K, Hardt F, Malchow-Møller A. [Liver involvement after treatment with naproxen] Ugeskr Laeger 1980; 142: 450-1. Danish. PubMed Citation  (57 year old man developed nausea after two doses of naproxen with jaundice arising a few days later [bilirubin 8.2 mg/dL, ALT 70 U/L, Alk P 760 U/L], resolving within 4 to 5 weeks).

  8. Victorino RM, Silveira JC, Baptista A, de Moura MC. Jaundice associated with naproxen. Postgrad Med J 1980; 56: 368-70. PubMed Citation  (66 year old man developed jaundice [bilirubin 5.8 mg/dL, AST 102 U/L, Alk P 4 times ULN] 1 month after starting naproxen, resolving within few weeks of stopping).

  9. Giarelli L, Falconieri G, Delendi M. Fulminant hepatitis following naproxen administration. Hum Pathol 1986; 17: 1079. Erratum in: Hum Pathol 1987; 18: 205. PubMed Citation  (25 year old woman developed acute liver failure 1 month after a 5 day course of naproxen by suppository [bilirubin 18 mg/dL, ALT 1100 U/L, Alk P 196 U/L], other causes not completely ruled out).

  10. Grattan CEH. Pustular reaction to naproxen with cholestatic jaundice. Dermatologica 1989; 179: 57-8.  PubMed Citation.  (Brief description of a patient who developed pustular dermatosis and cholestatic jaundice while taking naproxen for osteoarthritis; no details given of time of onset or liver test results).

  11. Reeve PA, Moshiri M, Bell GD. Pulmonary oedema, jaundice and renal impairment with naproxen. Br J Rheumatol 1987; 26: 70-1. PubMed Citation  (53 year old man developed pulmonary edema 1 week after starting naproxen followed by fever and jaundice [bilirubin 5.5 mg/dL, Alk P 72 U/L, AST 36 U/L], with little inflammation on liver biopsy and rapid recovery).

  12. Andrejak M, Davion T, Gineston JL, Capron JP. Cross hepatotoxicity between non-steroidal anti-inflammatory drugs. Br Med J 1987; 295: 180-1. PubMed Citation  (67 year old woman developed jaundice [bilirubin 4.9 mg/dL, ALT 250 U/L, Alk P 280 U/L] 9 days after starting naproxen, with rapid resolution, but recurrence in 4 days upon exposure to fenoprofen: Case 1).

  13. Smolinske SC, Hall AH, Vandenberg SA, Spoerke DG, McBride PV. Toxic effects of nonsteroidal anti-inflammatory drugs in overdose. An overview of recent evidence on clinical effects and dose-response relationships. Drug Saf 1990; 5: 252-74. PubMed Citation  (Review of literature on overdose of NSAIDs; overdose of naproxen typically causes gastrointestinal upset, metabolic acidosis and drowsiness, stupor and coma; one instance of very transient jaundice with ALT 64 U/L has been described).

  14. Bell H, Raknerud N. [Fulminating hepatitis after treatment with naproxen and/or disulfiram?] Tidsskr Nor Laegeforen 1991; 111: 322-3. Norwegian. PubMed Citation  (Abstract only: 49 year old woman developed acute liver failure 6 weeks after starting disulfiram and 5 days after starting naproxen [bilirubin 26.4 mg/dL, ALT 2815 U/L], probably too rapid an onset for naproxen and more likely due to disulfiram).

  15. Zimmerman HJ. Update of hepatotoxicity due to classes of drugs in common clinical use: non-steroid drugs, anti-inflammatory drugs, antibiotics, antihypertensives, and cardiac and psychotropic agents. Semin Liver Dis 1990; 10: 322-8. PubMed Citation(Review article; naproxen listed as rare cause of hepatic injury with only 5 published cases, usually cholestatic, probably due to idiosyncrasy).

  16. Jick H, Derby LE, García Rodríguez LA, Jick SS, Dean AD. Liver disease associated with diclofenac, naproxen, and piroxicam. Pharmacotherapy 1992; 12: 207-12. PubMed Citation  (Analysis of UK database on 102,644 persons receiving NSAIDs, including 50,6676 on naproxen; 14 cases of suspected drug induced liver disease; most due to diclofenac, cases in patients on naproxen usually had another possible cause).

  17. Carson JL, Strom BL, Duff A, Gupta A, Das K. Safety of NSAIDs with respect to acute liver disease. Arch Intern Med 1993; 4: 496-501. PubMed Citation  (Analysis of Medicaid database from Michigan and Florida from 1980-87 found 107 cases of acute idiopathic hepatitis [2.2/100,000], of whom 8.4% received NSAIDs and 0.9% naproxen, compared to 6.1% and 1.6% of 428 case-controls, suggesting little contribution of NSAIDs to acute liver injury).

  18. Garcia Rodriguez LA, Williams R, Derby LE, Dean AD, Jick H. Acute liver injury associated with nonsteroidal anti-inflammatory drugs and the role of risk factors. Arch Intern Med 1994; 154: 311-6. PubMed Citation  (Retrospective cohort study of cases of acute liver injury in England after exposure to NSAIDs; 23 cases, but none fatal, including 5 from ibuprofen, 4 diclofenac, 4 naproxen, 2 mefenamic acid, 3 ketoprofen, 2 piroxicam, 2 fenbuten and 3 sulindac).

  19. D'Amore F, Agostino A, Santoro A. Drug-induced cholestasis. Clinical contribution. Minerva Gastroenterol Dietol 1996; 42: 215-9. PubMed Citation  (61 year old developed jaundice 15 days after starting an 8-day course of naproxen [bilirubin 11.7 mg.dL, ALT 117 U/L, Alk P 277 U/L], resolving within 2 months).

  20. Manoukian AV, Carson JL. Nonsteroidal anti-inflammatory drug-induced hepatic disorders. Incidence and prevention. Drug Saf 1996; 15: 64-71. PubMed Citation  (Review article focusing largely on diclofenac and sulindac; naproxen is associated with abnormal liver enzymes in ~4%; acute liver injury in 3.8/100,000 users).

  21. Walker AM. Quantitative studies of the risk of serious hepatic injury in persons using nonsteroidal antiinflammatory drugs. Arthritis Rheum 1997; 40: 201-8. PubMed Citation  (Review of population based studies of NSAID use and hepatic injury; frequency of clinically apparent liver injury from NSAIDs was ~10 cases per 100,000 patient-years of use, ranging from 9 to 12 per 100,000 for naproxen).

  22. Pérez-Gutthann S, García-Rodríguez LA, Duque-Oliart A, Varas-Lorenzo C. Low-dose diclofenac, naproxen, and ibuprofen cohort study. Pharmacotherapy 1999; 19: 854-9. PubMed Citation  (Analysis of database of general practice in UK on 3 million persons; analysis of 1991-5 of patients receiving first prescription for diclofenac [n=22,146], naproxen [n=46,919] or ibuprofen [n=54,830] in low doses similar to what might be given over-the-counter, found 64 complications, 13 liver injury, but only 3 confirmed, 1 naproxen [0.2/10,000], 2 ibuprofen [0.4/10,000], none diclofenac!).

  23. Bareille MP, Montastruc JL, Lapeyre-Mestre M. [Liver damage and nonsteroidal anti-inflammatory drugs: case non-case study in the French Pharmacovigilance Database] Therapie 2001; 56: 51-5. French. PubMed Citation  (Using French database, overall 13% of adverse events due to NSAIDs were hepatic injury, including 15.7% of naproxen reports, but concomitant exposures to other hepatotoxins were frequent).

  24. Traversa G, Bianchi C, Da Cas R, Abraha I, Menniti-Ippolito F, Venegoni M. Cohort study of hepatotoxicity associated with nimesulide and other non-steroidal anti-inflammatory drugs. BMJ 2003; 327: 18-22. PubMed Citation  (Among 397,537 patients who received a prescription for an NSAID [770,000 person years] between 1997 and 2002, 42 developed an acute non-viral hepatitis requiring hospitalization including 2 of 7833 receiving naproxen).

  25. Teoh NC, Farrell GC. Hepatotoxicity associated with non-steroidal anti-inflammatory drugs. Clin Liver Dis 2003; 7: 2: 401-13. PubMed Citation  (Review article on NSAIDs, naproxen said to cause cholestatic or mixed injury and to be low in incidence).

  26. Russo MW, Galanko JA, Shrestha R, Fried MW, Watkins P. Liver transplantation for acute liver failure from drug induced liver injury in the United States. Liver Transplant 2004; 10: 1018-23. PubMed Citation  (Review of UNOS database from 1990-2002, found 270 cases of acute liver failure undergoing liver transplant due to medications; one case reportedly due to naproxen).

  27. Björnsson E, Jerlstad P, Bergqvist A, Olsson R. Fulminant drug-induced hepatic failure leading to death or liver transplantation in Sweden. Scand J Gastroenterol 2005; 40: 1095-1101. PubMed Citation  (Survey of all cases of drug-induced liver injury with fatal outcome from Swedish Adverse Drug Reporting system from 1966-2002; among 103 cases, 3 attributed to naproxen without specific details given).

  28. Andrade RJ, Lucena MI, Fernandez MC, Pelaez G, Pachkoria K, Garcia-Ruiz E, et al. Drug-induced liver injury: an analysis of 461 incidences submitted to the Spanish Registry over a 10-year period. Gastroenterology 2005; 129: 512-21. PubMed Citation  (Reports of Spanish drug induced liver injury network on 570 cases, ibuprofen and diclofenac, but not naproxen mentioned among the 20 most frequent causes with >4 cases).

  29. Björnsson E, Olsson R. Suspected drug-induced liver fatalities reported to the WHO database. Dig Liver Dis 2006; 38: 33-8. PubMed Citation  (Survey of drug induced liver fatalities reported to WHO database between 1968-2003 revealed 4690 reports; [89% from the US]; 21 drugs were associated with >50 cases, including diclofenac [15th], but not naproxen).

  30. Demirag MD, Ozenirler S, Goker B, Poyraz A, Haznedaroglu S, Ozturk MA. Idiosyncratic toxic hepatitis secondary to single dose of naproxen. Acta Gastroenterol Belg 2007; 70: 247-8. PubMed Citation  (57 year old woman developed jaundice 6 days after taking a single dose of naproxen [bilirubin 22 mg/dL, ALT 2196 U/L, Alk P 80 U/L], with resolution over the next 5 months; other causes sought, but not identified: Case 2).

  31. Ting TV, Hashkes PJ. Methotrexate/naproxen-associated severe hepatitis in a child with juvenile idiopathic arthritis. Clin Exp Rheumatol 2007; 25: 928-9. PubMed Citation  (Onset of severe liver injury in 2 year old child with juvenile rheumatoid arthritis, after 10 months exposure to methotrexate and naproxen, with recovery after stopping therapy; hypothesized that naproxen had a synergistic effect with methotrexate).

  32. Aithal GP, Day CP. Nonsteroidal anti-inflammatory drug-induced hepatotoxicity. Clin Liver Dis 2007; 11: 563-75, vi-vii. PubMed Citation  (Review of hepatotoxicity of NSAIDs; naproxen not specifically discussed).

  33. Chalasani N, Fontana RJ, Bonkovsky HL, Watkins PB, Davern T, Serrano J, Yang H, Rochon J; Drug Induced Liver Injury Network (DILIN). Causes, clinical features, and outcomes from a prospective study of drug-induced liver injury in the United States. Gastroenterology 2008; 135: 1924-34. PubMed Citation (Among 300 cases of drug induced liver disease in the US collected from 2004 to 2008, NSAIDs were implicated as a sole agent in 8 cases [4 diclofenac, 2 celecoxib, 1 meloxicam and 1 oxaprozin] and as one of several agents in 3 cases [1 diclofenac, 1 celecoxib, 1 ibuprofen]).

  34. Soni P, Shell B, Cawkwell G, Li C, Ma H. The hepatic safety and tolerability of the cyclooxygenase-2 selective NSAID celecoxib: pooled analysis of 41 randomized controlled trials. Curr Med Res Opin 2009; 25: 1841-51. PubMed Citation  (A retrospective analysis of a pharmaceutical company's 41 study dataset, of patients with various inflammatory conditions; adverse events for celecoxib, placebo, diclofenac, naproxen, and ibuprofen were analyzed; incidence of hepatic adverse events due to celecoxib was similar for placebo and ibuprofen or naproxen, but lower than for diclofenac).

  35. Carrascosa MF, Lucena MI, Andrade RJ, Caviedes JR, Lavín AC, Mones JC, Rivero AP, et al. Fatal acute hepatitis after sequential treatment with levofloxacin, doxycycline, and naproxen in a patient presenting with acute Mycoplasma pneumoniae infection. Clin Ther 2009; 31: 1014-9. PubMed Citation  (63 year old man with pneumonia developed jaundice 10 days after starting antibiotics and naproxen progressing to hepatic failure and death within 27 days [initial bilirubin 4.0 ALT 1577, Alk P 189 U/L]; causality assessment implicated levofloxacin, doxycycline, and naproxen).

  36. Bessone F. Non-steroidal anti-inflammatory drugs: What is the actual risk of liver damage? World J Gastroenterol 2010; 16: 5651-61. PubMed Citation  (Review of estimated frequency of drug induced liver injury due to NSAIDs from large published epidemiological studies; mentions that naproxen has been associated with various hepatic reactions).

  37. Ferrajolo C, Capuano A, Verhamme KM, Schuemie M, Rossi F, Stricker BH, Sturkenboom MC. Drug-induced hepatic injury in children: a case/non-case study of suspected adverse drug reactions in VigiBase. Br J Clin Pharmacol 2010; 70: 721-8. PubMed Citation  (Worldwide pharmacovigilance database contained 9036 hepatic adverse drug reactions in children; naproxen is not listed among the top 41 causes).

  38. Reuben A, Koch DG, Lee WM; Acute Liver Failure Study Group. Drug-induced acute liver failure: results of a U.S. multicenter, prospective study. Hepatology 2010; 52: 2065-76. PubMed Citation  (Among 1198 patients with acute liver failure enrolled in a US prospective study between 1998 and 2007, 133 were attributed to drug induced liver injury, of which 7 were due to NSAIDs, including 4 attributed to bromfenac, 2 to diclofenac and 1 to etodolac, but none to naproxen).

  39. Ali S, Pimentel JD, Ma C. Naproxen-induced liver injury. Hepatobiliary Pancreat Dis Int. 2011; 10: 552-6.  PubMed Citation  (30 year old woman with lupus erythematosus on long term prednisone developed jaundice a few weeks after starting naproxen [bilirubin 10.5 mg/dL, ALT 926 U/L, Alk P 472 U/L], with persistence of Alk P elevations and reduced numbers of bile ducts on liver biopsy that gradually improved; liver tests becoming normal 10 years later and liver biopsy showing partial return of bile ducts).

  40. Lapeyre-Mestre M, Grolleau S, Montastruc JL; Adsociation Française des Centres Régionaux de Pharmacovigilance (CRPV). Adverse drug reactions associated with the use of NSAIDs: a case/noncase analysis of spontaneous reports from the French pharmacovigilance database 2002-2006. Fundam Clin Pharmacol 2013; 27: 223-30. PubMed Citation  (Analysis of 42,389 spontaneous serious adverse event reports to the French Pharmacovigilance database on 8 NSAIDs between 2002 and 2006; liver adverse events were most frequent with nimesulide [0.15 per million daily doses] compared to diclofenac [0.09], ketoprofen [0.09] piroxicam [0.06], naproxen [0.04], meloxicam [0.03], and tenoxicam [0.03]).

  41. Gulmez SE, Larrey D, Pageaux GP, Lignot S, Lassalle R, Jové J, Gatta A, et al.
    Transplantation for acute liver failure in patients exposed to NSAIDs or paracetamol (acetaminophen): the multinational case-population SALT study. Drug Saf 2013; 36: 135-44. PubMed Citation  (Among 600 patients undergoing liver transplantation for acute liver failure at 52 European liver transplant centers between 2005 and 2007, 301 were considered idiopathic and had received a medication within 30 days of onset; including acetaminophen in 192 and NSAIDs in 44, including diclofenac [the most commonly used NSAID] in 7, but naproxen in only 2 for a rate of 1.6 per million treatment years).

  42. Björnsson ES, Bergmann OM, Björnsson HK, Kvaran RB, Olafsson S. Incidence, presentation and outcomes in patients with drug-induced liver injury in the general population of Iceland. Gastroenterology 2013; 144: 1419-25. PubMed Citation  (In a population based study of drug induced liver injury from Iceland, 96 cases were identified over a 2 year period, including 6 attributed to diclofenac [ranking 2nd], but none for naproxen or other NSAIDs).

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OTHER REFERENCE LINKS
Naproxen
  1. PubMed logoRecent References on Naproxen

  2. Clinical Trials logoTrials on Naproxen

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