722
A 67-year-old man receiving a stable maintenance dosage of warfarin experienced an increased international normalized ratio (INR) without bleeding when his atorvastatin therapy was switched to fluvastatin.
 adverse event: experienced 
Please tell me event type and its trigger word from given type options. Output format is "type: trigger".  Option: adverse event, potential therapeutic event 
Text: {0} 
Answer:
 adverse event: experienced 