Diffuse Alveolar Hemorrhage Caused by Warfarin After Rifampicin Discontinuation
Overview
Authors
Affiliations
An 83-year-old man under warfarin therapy presented for assessment of prolonged prothrombin time and cough. High-resolution computed tomography findings of the chest showed diffuse alveolar hemorrhage. His international normalized ratio (INR) was 11.89. He had been treated with rifampicin for a persistent infection, but this had been discontinued about two months before admission. Rifampicin suppresses the anticoagulant activity of warfarin, which can lead to a need for increased doses of warfarin to achieve and maintain a therapeutic INR. More frequent INR monitoring is needed even after discontinuing rifampicin.
Hwang K, Choi J, Lee S, Lee S, Chon M, Lee J BMC Cardiovasc Disord. 2023; 23(1):182.
PMID: 37016321 PMC: 10074893. DOI: 10.1186/s12872-023-03212-z.
Salem M, Eljilany I, El-Bardissy A, Elewa H Pharmgenomics Pers Med. 2021; 14:149-156.
PMID: 33542643 PMC: 7851577. DOI: 10.2147/PGPM.S288918.
Strategies and Advances in Combating COVID-19 in China.
Liu W, Guan W, Zhong N Engineering (Beijing). 2020; 6(10):1076-1084.
PMID: 33078078 PMC: 7558233. DOI: 10.1016/j.eng.2020.10.003.
Dynamic relationship between D-dimer and COVID-19 severity.
Li Y, Zhao K, Wei H, Chen W, Wang W, Jia L Br J Haematol. 2020; 190(1):e24-e27.
PMID: 32420615 PMC: 7276819. DOI: 10.1111/bjh.16811.
An interesting case of gluteal haematoma.
Sahu K, Mishra A, Lal A, Davuluri V BMJ Case Rep. 2019; 12(8).
PMID: 31375506 PMC: 6677962. DOI: 10.1136/bcr-2019-230282.