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We report on three patients with acute schizophrenia , who developed severe akathisia during treatment with olanzapine ( 20 - 25 mg / d ) .
 severe akathisia, olanzapine
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: adverse effect 
Text: {0} 
Answer:
 severe akathisia, olanzapine