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A 9-year - old boy developed acute renal failure following intravenous acyclovir ( 30 mg / kg per day ) administered for 6 days to treat herpetic encephalitis .
 adverse effect: acute renal failure, acyclovir
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: acute renal failure, acyclovir