10909
A 73 year - old patient with Wolff - Parkinson - White syndrome and paroxysmic supraventricular tachycardia developed an acute reversible encephalopathy within 15 days of initiation of flecainide .
 acute reversible encephalopathy, flecainide
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:
 acute reversible encephalopathy, flecainide