5537
We report a case admitted with a first - detected , symptomatic paroxysmal atrial fibrillation in a healthy patient after self - medication with vardenafil .
 symptomatic paroxysmal atrial fibrillation, vardenafil
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:
 symptomatic paroxysmal atrial fibrillation, vardenafil