Prospective studies indicated that repeated use of a true therapeutic acetaminophen dosage may slightly increase the level of serum aminotransferase activity, but hepatic failure or death was not reported. Retrospective reports indicated a higher rate of increased serum aminotransferase levels, and several reported associated liver injury and death. The differing results and presence of evidence indicating inaccurate acetaminophen dosage information in some case reports suggests that these cases may be inadvertent overdoses, rather than true therapeutic dosages.
Buprenorphine appears to have a better safety profile than methadone during routine outpatient medical use. However, both medications have roles in the treatment of pain and opioid addiction, and further research into their respective benefits and risks should be conducted.
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