Drug Interactions With Propafenone SR

Venlafaxine
Propafenone SR may increase blood levels of venlafaxine, increasing the risk for side effects. Talk to your healthcare provider about this potential interaction before taking these medications together.
 
Warfarin
Propafenone SR has been shown to increase warfarin blood levels, increasing the risk for bleeding. Your healthcare provider may need to adjust your warfarin dose based on your prothrombin time ("protime" or PT) and international normalized ratio (INR), especially when you first start or stop using propafenone SR.
 

Final Thoughts

It is possible that not all propafenone SR drug interactions were discussed in this article. Therefore, you should talk with your pharmacist or healthcare provider about the specific interactions that may apply to you.
 
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Propafenone Extended-Release Information

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