“This study investigated if, and in what manner, concomitant administration of caffeine affects PZA metabolism.”
“… kg−1 caffeine … PZA increased from the excretion (p<0.05) of the most water‐soluble and the least toxic PZA metabolite 5‐hydroxypyrazinoic acid (5‐OH‐… 173.23±17.82 μmol/24 h. These results show that the metabolic disposition of PZA is affected by concomitant caffeine intake.”