662
Crossover comparison of efficacy and preference for rizatriptan 10 mg versus ergotamine / caffeine in migraine .
 rizatriptan, ergotamine, caffeine, migraine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 rizatriptan, ergotamine, caffeine, migraine