2961
These results , in combination with previous work , suggest that muscle rigidity , a clinically relevant side - effect of parenteral narcotic administration , may be partly mediated via serotonergic pathways .
 Disease: muscle rigidity
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Disease: muscle rigidity