18949
Using minimum 6 - week clinical trial criteria , atomoxetine may demonstrate similar efficacy to methylphenidate comparing reduction in core ADHD symptoms in meta - analysis , although the diversity of the data makes interpretation complex .
 atomoxetine, methylphenidate
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 atomoxetine, methylphenidate