2025
Sex differences in NMDA antagonist enhancement of morphine antihyperalgesia in a capsaicin model of persistent pain : comparisons to two models of acute pain .
 NMDA, morphine, capsaicin, pain, acute pain
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 NMDA, morphine, capsaicin, pain, acute pain