1633
A cause-effect relationship to capecitabine was suggested due to resolution of headache with capecitabine withdrawal and reappearance with capecitabine rechallenge.
 adverse event: relationship to 
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: relationship to 