22 F DVT 450 70 mg/week (10 mg/day) −88 33.8 mg/week (4.8 mg/day) −37.0 12 54 Noe H, Amoxicillin, Paracetamol Completed therapy 6. 9 M DVT 300 35 mg/week (5 mg/day) 0 37.0 mg/weekc (5.3 mg/ day) 5.8 Never reachedd 53 Yes HZE Completed therapy 7. 49 M DVT 600 35 mg/week (5 mg/day) −3 66.3 mg/week (9.5 mg/ day) 89.3 59 42 Yes HZE Ongoing therapy 8. 30 F PE 600 35 mg/week (5 mg/day) −35 189.3 mg/week (27.0 mg/day) 440.9 67 30 Yes HZE, Pyridoxine Ongoing therapy 9. 29 F DVT 600 35 mg/week (5 mg/day) −31 82.5 mg/week (11.8 mg/ day) 135.7 7 40 Yes HZE, Ibuprofen
Completed therapy 10. 71 M Ischemic stroke & DVT 600 42 mg/week (6 mg/day) −46 45.5 mg/week (6.5 mg/day) 8.3 63 66 Yes HZE, Vincamine, Fluoxetine, Furosemide, Benzhexol Ongoing therapy DVT deep vein thrombosis, RHD rheumatic heart disease, PE pulmonary embolism, H isoniazid, Z pyrazinamide, E Daporinad chemical structure ethambutol aYes means 100 % compliance taking the correct warfarin dose bNo, the patient is considered non-adherent due to occasional overdosing cThe last warfarin dose given to the patient. No warfarin dose given achieved two consecutive therapeutic INR during concurrent warfarin and anti-TB therapy dNever reached, two consecutive therapeutic INRs were not achieved during concurrent warfarin and anti-TB therapy eNo means less than
100 % compliance due to missed doses Table 2 Measures of central tendency for variables from the cases Variable Median, interquartile range Age (years) 29.5 (20.75–52.75) Percentage increase ALK inhibitor review in weekly warfarin dose to achieve therapeutic INR (%) 15.7 (3.15–146.1) Median weekly warfarin dose on attaining a therapeutic INR 73.1 (38.8–81.6) Median daily warfarin dose on attaining a therapeutic INR 10.4 (5.5–11.7) Days to therapeutic INR (days) 61a (18–65.25)a
Time in therapeutic range (TTR) (%) 47 (30–54) aIncludes SPTLC1 only the patients who reached therapeutic INR during their anticoagulation therapy (n = 8) Further assessment of the findings reveal certain clinically relevant trends including, but not limited to, the AR-13324 influence of age, timing of rifampicin and warfarin use, impact of comorbid conditions, and effect of concomitant medication use. When looking at patients at the extremes of age (case 6 [9 years old] and case 10 [71 years old]), a smaller percentage increase in the weekly warfarin dose is seen. The dramatic impact of the timing of rifampicin use and warfarin therapy can be seen when looking at the results of case 1 and case 7 as these cases required a relatively large increase in their weekly warfarin dose of 177.3 and 89.3 % respectively. In both of these cases, warfarin therapy was started within 2 weeks of starting rifampicin. The impact of comorbidities on warfarin dosing in the presence of rifampicin can be seen amongst cases 2 (RHD), 3 (HIV [not on antiretroviral therapy]), 4 (severe osteoarthritis), and 10 (cerebral infarct).
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