Systematic review: the hepatotoxicity of non-steroidal anti-inflammatory drugs.
BACKGROUND
Non-steroidal anti-inflammatory drugs have been implicated in reports of liver injury. However, the precise risk of non-steroidal anti-inflammatory drugs for this rare complication is unknown.


OBJECTIVE
To review systematically the published literature of population-based epidemiological studies reporting the incidence or comparative risk of non-steroidal anti-inflammatory drugs for liver injury resulting in clinically significant events, defined as hospitalization or death.


METHODS
Duplicate extraction of the methodological quality, design, source, population, years studied, particular non-steroidal anti-inflammatory drugs studied, definitions, patient counts and follow-up, and the adjustment for confounders.


RESULTS
Seven articles met inclusion criteria. The comparative risk of liver injury resulting in hospitalization for current non-steroidal anti-inflammatory drug users compared with past non-steroidal anti-inflammatory drug users ranged from 1.2 to 1.7, but none was statistically significant. The incidence of liver injury resulting in hospitalization ranged from 3.1 to 23.4/100,000 patient-years of current use of non-steroidal anti-inflammatory drugs, with an excess risk compared with past non-steroidal anti-inflammatory drugs users of 4.8-8.6/100,000 patient-years of exposure. There were zero deaths from liver injury associated with non-steroidal anti-inflammatory drugs use in over 396,392 patient-years of cumulative exposure.


CONCLUSIONS
These findings allow for the possibility of a small increase in the risk of clinically relevant hepatotoxicity with non-steroidal anti-inflammatory drugs use, but do not document that such a risk occurs.
Division of Gastroenterology, University of Michigan Health System, Ann Arbor, MI 48109-0362, USA. jhr@umich.edu
J H
JH
Rubenstein
L
L
Laine
D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000009:adverse effects*; D056486:Chemical and Drug Induced Liver Injury; D006760:Hospitalization / Q000706:statistics & numerical data; D006801:Humans; D008107:Liver Diseases / Q000401:mortality; D011379:Prognosis; D012307:Risk Factors
D000894:Anti-Inflammatory Agents, Non-Steroidal