29461
There is significantly increased tobacco use , and therefore nicotine intake , in patient populations , and pharmacological agents that act on various nicotinic receptor subtypes ameliorate clinical features of these disorders .
 Chemical: nicotine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: nicotine