19938
The effect of rosiglitazone on bone mass and fragility is reversible and can be attenuated with alendronate .
 rosiglitazone, alendronate
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 rosiglitazone, alendronate