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A case is presented of a patient who experienced benzodiazepine withdrawal symptoms on discontinuation of nefazodone, an antidepressant that inhibits the cytochrome P450 3A4 isoenzyme.
 adverse event: discontinuation 
Please tell me event type and its trigger word from given type options. Output format is "type: trigger".  Option: adverse event, potential therapeutic event 
Text: {0} 
Answer:
 adverse event: discontinuation 