CoaguChek Professional Monitoring Systems
Training Manual
21
Warfarin
Interferences
Important Note – The interferences below are limited, and subject to change.
For a complete list of interferences refer to appropriate documentation for example
the British National Formulary
The action of oral anticoagulants (coumarin derivatives) can be increased or weakened when other
medication is taken simultaneously (e.g. antibiotics, but also prescription-free medication like pain
relievers, antirheumatic medication and medication against influenza). This, in turn, can also lead to
either an increase or a decrease in prothrombin time (INR). Additional medication should only be
taken if prescribed by a health care professional. If other medication is taken, it is recommended
that the prothrombin time be checked more frequently and that the anticoagulant dose be
subsequently adjusted as directed by the health care professional.
Change in a patient’s clinical condition, particularly associated with liver disease, intercurrent illness,
or drug administration, necessitates more frequent testing. Major changes in diet (especially
involving salads and vegetables) and in alcohol consumption may also affect anticoagulant control.*
*www.evidence.nhs.uk/formulary/bnf/current/a1-interactions/list-of-drug-interactions/anticoagulants/coumarins/warfarin [accessed July 2014]
Summary of Contents for CoaguChek XS Plus
Page 1: ...CoaguChek Professional Monitoring Systems Training Manual...
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Page 5: ...CONTACT AND ORDER DETAILS...
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Page 9: ...SYSTEM INTRODUCTION...
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Page 17: ...INTERFERENCES...
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Page 23: ...TRAINING...
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Page 37: ...CLEANING...
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Page 45: ...TROUBLESHOOTING...
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Page 49: ...APPENDIX 1...
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Page 65: ...APPENDIX 2...
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Page 67: ...Accuracy and precision in oral anticoagulation monitoring I know my value...
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