5476
While on a maximal dose of phenylephrine she developed prominent positive U waves , which disappeared with the cessation of the drug .
 positive U waves, phenylephrine
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:
 positive U waves, phenylephrine