7107
We present a case report of a patient who developed a prolonged QT while being treated with oral methadone for a chronic pain syndrome .
 prolonged QT, methadone
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: adverse effect 
Text: {0} 
Answer:
 prolonged QT, methadone