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. 1987 May;23(5):553–559. doi: 10.1111/j.1365-2125.1987.tb03091.x

Effect of rifampicin on haem and bilirubin metabolism in man.

K E McColl, G G Thompson, E el Omar, M R Moore, B K Park, M J Brodie
PMCID: PMC1386191  PMID: 2885023

Abstract

Haem and bilirubin metabolism was studied in seven healthy volunteers during 4 weeks treatment with rifampicin 600 mg at night. The serum unconjugated bilirubin concentration increased 2-3 fold in the first 24 h of treatment (P less than 0.01) and subsequently fell to below pretreatment values (P less than 0.05) during the third and fourth weeks of rifampicin therapy. In each subject, the activity in leucocytes of delta-aminolaevulinic acid (ALA) synthase increased and that of protoporphyrinogen (proto) oxidase decreased during the first week of therapy. The mean ALA synthase activity was most markedly increased on day 4 being seven-fold its pretreatment value (P less than 0.01), and the mean proto oxidase activity most depressed on day 2 at 50% its pretreatment value (P less than 0.02). There was increased urinary excretion of porphobilinogen (PBG) during the first week of therapy and increased excretion of porphyrins and PBG during the third week of treatment. The increase in ALA synthase activity and haem precursor excretion can be explained by the combination of increased haem demand for haemoprotein induction and partial block in haem synthesis due to reduced proto oxidase activity.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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