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Clindamycin does not interact with coumadin directly, though clindamycin is shown to cause liver damage, If this is the case the coumadin can increase INR greater than expected..Regards, kindly click ACCEPT if i have answered to your satisfation, a positive feedback and a bonus will be highly appreciated..esolved Question: my mother take coumadin and was given clindamycin for a tooth infection. Her INR is now 4.8. Her dentist told her that the antibiotic should not interact with her coumadin.
The alteration of this substance reduces or enhances the effect of another drug that is being taken. The drug interaction between warfarin (Coumadin) and vitamin K-containing products is a good example of this type of interaction. Warfarin acts by reducing the concentration of the active form of vitamin K in the body.Therefore, when vitamin K is taken, it reduces the effect of warfarin.n interaction can result when there is an increase or decrease in: 1  the absorption of a drug into the body; 2  distribution of the drug within the body; 3  alterations made to the drug by the body (metabolism); and. 4  elimination of the drug from the body.