4048
The arrhythmias were temporally related to cimetidine administration , disappeared after dechallenge , and did not recur during ranitidine treatment .
 arrhythmias, cimetidine, ranitidine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 arrhythmias, cimetidine, ranitidine