8665
Nifedipine may induce , or aggravate , pre - existing , gastro - oesophageal reflux .
 gastro - oesophageal reflux, Nifedipine
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:
 gastro - oesophageal reflux, Nifedipine