The correlation between serum anti-tuberculosis (TB) drug levels and the drug-induced hepatotoxicity (DIH) remains unclear. The purpose of this study was to investigate whether anti-TB DIH is associated with basal serum drug levels. Serum peak levels of isoniazid (INH), rifampicin (RMP), pyrazinamide (PZA), and ethambutol (EMB) were analyzed in blood samples 2 hr after the administration of anti-TB medication. Anti-TB DIH and mild liver function test abnormality were diagnosed on the basis of laboratory and clinical criteria. Serum anti-TB drug levels and other clinical factors were compared between the hepatotoxicity and non-hepatotoxicity groups. A total of 195 TB patients were included in the study, and the data were analyzed retrospectively. Seventeen (8.7%) of the 195 patients showed hepatotoxicity, and the mean aspartate aminotransferase/alanine aminotransferase levels in the hepatotoxicity group were 249/249 IU/L, respectively. Among the 17 patients with hepatotoxicity, 12 showed anti-TB DIH. Ten patients showed PZA-related hepatotoxicity and 2 showed INH- or RMP-related hepatotoxicity. However, intergroup differences in the serum levels of the 4 anti-TB drugs were not statistically significant. Basal serum drug concentration was not associated with the risk anti-TB DIH in patients being treated with the currently recommended doses of first-line anti-TB treatment drugs.
Adolescent ; Adult ; Aged ; Aged, 80 and over ; Alanine Transaminase/blood ; Antitubercular Agents/adverse effects/*blood/therapeutic use ; Aspartate Aminotransferases/blood ; Drug-Induced Liver Injury/*blood ; Ethambutol/adverse effects/blood/therapeutic use ; Female ; Humans ; Isoniazid/adverse effects/blood/therapeutic use ; Liver/*pathology ; Liver Function Tests ; Male ; Middle Aged ; Pyrazinamide/adverse effects/blood/therapeutic use ; Retrospective Studies ; Rifampin/adverse effects/blood/therapeutic use ; Tuberculosis, Pulmonary/drug therapy ; Young Adult

The correlation between serum anti-tuberculosis (TB) drug levels and the drug-induced hepatotoxicity (DIH) remains unclear. The purpose of this study was to investigate whether anti-TB DIH is associated with basal serum drug levels. Serum peak levels of isoniazid (INH), rifampicin (RMP), pyrazinamide (PZA), and ethambutol (EMB) were analyzed in blood samples 2 hr after the administration of anti-TB medication. Anti-TB DIH and mild liver function test abnormality were diagnosed on the basis of laboratory and clinical criteria. Serum anti-TB drug levels and other clinical factors were compared between the hepatotoxicity and non-hepatotoxicity groups. A total of 195 TB patients were included in the study, and the data were analyzed retrospectively. Seventeen (8.7%) of the 195 patients showed hepatotoxicity, and the mean aspartate aminotransferase/alanine aminotransferase levels in the hepatotoxicity group were 249/249 IU/L, respectively. Among the 17 patients with hepatotoxicity, 12 showed anti-TB DIH. Ten patients showed PZA-related hepatotoxicity and 2 showed INH- or RMP-related hepatotoxicity. However, intergroup differences in the serum levels of the 4 anti-TB drugs were not statistically significant. Basal serum drug concentration was not associated with the risk anti-TB DIH in patients being treated with the currently recommended doses of first-line anti-TB treatment drugs.
Adolescent ; Adult ; Aged ; Aged, 80 and over ; Alanine Transaminase/blood ; Antitubercular Agents/adverse effects/*blood/therapeutic use ; Aspartate Aminotransferases/blood ; Drug-Induced Liver Injury/*blood ; Ethambutol/adverse effects/blood/therapeutic use ; Female ; Humans ; Isoniazid/adverse effects/blood/therapeutic use ; Liver/*pathology ; Liver Function Tests ; Male ; Middle Aged ; Pyrazinamide/adverse effects/blood/therapeutic use ; Retrospective Studies ; Rifampin/adverse effects/blood/therapeutic use ; Tuberculosis, Pulmonary/drug therapy ; Young Adult

We report the case of a 36-year-old man with psoriatic arthritis and miliary tuberculosis, whose serum uric acid (SUA) level increased after the initiation of antituberculosis treatment, which included pyrazinamide. Most strikingly and paradoxically, the patient's SUA level increased after treatment with allopurinol. On cessation of allopurinol, his SUA level decreased substantially, and complete normalisation was observed following the discontinuation of pyrazinamide treatment.
Adult ; Allopurinol ; therapeutic use ; Arthritis, Psoriatic ; drug therapy ; Humans ; Hyperuricemia ; chemically induced ; Male ; Pyrazinamide ; adverse effects ; Treatment Outcome ; Tuberculosis, Miliary ; drug therapy ; Uric Acid ; blood