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INR 1.1 to 1.3 | Give same dose as on day 1 |
INR 1.4 to 3.0 | Give 50% of day 1 dose |
INR 3.1 to 3.5 | Give 25% of day 1 dose |
INR >3.5 | Hold warfarin until INR <3.5, then restart at 50% reduced dose |
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INR 1.1 to 1.4 | Increase dose by 20% |
INR 1.5 to 1.9 | Increase dose by 10% |
INR 2.0 to 3.0 | No change |
INR 3.1 to 3.5 | Decrease dose by 10% |
INR >3.5 | Hold warfarin until INR <3.5, then restart at 20% reduced dose |
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