Figures & data
Table 1. Summary of sources of variability discussed in this article, with potential actions that could reduce pharmacokinetic variability.
Figure 1. Evaluation of WHO’s current weight band-based doses for the treatment of drug-sensitive TB. AUC to 24 h (AUC0–24) for rifampin (Court R, Chirehwa MT, Wiesner L, Wright B, Smythe W, Kramer N, McIlleron H. Quality assurance of rifampin-containing fixed-drug combinations in South Africa: dosing implications. Int J Tuberc Lung Dis. 1 May 2018;22(5):537–543. Reprinted with permission of the International Union Against Tuberculosis and Lung Disease. Copyright © The Union), isoniazid, pyrazinamide and ethambutol, by weight band. Left-hand panel: Predicted AUC0–24 when the currently recommended fixed dose combination tablets (rifampin/isoniazid/pyrazinamide/ethambutol 150/75/400/275 mg) are given according to the dosing guidelines for adults (<38 kg—2 tablets; 38–54.9 kg—3 tablets; 55–70 kg—4 tablets; >70 kg—5 tablets). Right-hand panel: Predicted AUC0–24 when patients <55 kg are given an additional FDC to account for the higher CL/kg in smaller individuals (<38 kg—3 tablets; 38–54.9 kg—4 tablets; 55–70 kg—4 tablets; >70 kg—5 tablets).
![Figure 1. Evaluation of WHO’s current weight band-based doses for the treatment of drug-sensitive TB. AUC to 24 h (AUC0–24) for rifampin (Court R, Chirehwa MT, Wiesner L, Wright B, Smythe W, Kramer N, McIlleron H. Quality assurance of rifampin-containing fixed-drug combinations in South Africa: dosing implications. Int J Tuberc Lung Dis. 1 May 2018;22(5):537–543. Reprinted with permission of the International Union Against Tuberculosis and Lung Disease. Copyright © The Union), isoniazid, pyrazinamide and ethambutol, by weight band. Left-hand panel: Predicted AUC0–24 when the currently recommended fixed dose combination tablets (rifampin/isoniazid/pyrazinamide/ethambutol 150/75/400/275 mg) are given according to the dosing guidelines for adults (<38 kg—2 tablets; 38–54.9 kg—3 tablets; 55–70 kg—4 tablets; >70 kg—5 tablets). Right-hand panel: Predicted AUC0–24 when patients <55 kg are given an additional FDC to account for the higher CL/kg in smaller individuals (<38 kg—3 tablets; 38–54.9 kg—4 tablets; 55–70 kg—4 tablets; >70 kg—5 tablets).](/cms/asset/4fd63c69-ab99-49cc-a970-09a3e74c73e2/ierz_a_1555031_f0001a_oc.jpg)