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Anti - tuberculous drugs had been stopped on the 2nd day of therapy due to development of optic neuritis secondary to ethambutol administration at another hospital .
 adverse effect: optic neuritis, ethambutol
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: word3, word4". 
Option: adverse effect 
Text: {0} 
Answer:
 adverse effect: optic neuritis, ethambutol