14900
We describe a patient with a liver abscess due to Entamoeba histolytica , in whom metronidazole therapy ( total dose , 21 g over 14 days ) was complicated by reversible deafness , tinnitus , and ataxia and who relapsed 5 months later with a splenic abscess .
 adverse effect: ataxia, metronidazole; adverse effect: liver abscess, metronidazole; adverse effect: reversible deafness, metronidazole; adverse effect: splenic abscess, metronidazole; adverse effect: tinnitus, metronidazole
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: adverse effect 
Text: {0} 
 Entity Pairs:  ataxia, metronidazole; liver abscess, metronidazole; reversible deafness, metronidazole; splenic abscess, metronidazole; tinnitus, metronidazole 
Answer:
 adverse effect: ataxia, metronidazole; adverse effect: liver abscess, metronidazole; adverse effect: reversible deafness, metronidazole; adverse effect: splenic abscess, metronidazole; adverse effect: tinnitus, metronidazole