841
Patients were treated with 1 tablet ( 500 mg of niacin extended - release / 20 mg of lovastatin ) once nightly for 4 weeks and then 2 tablets for 8 weeks .
 Chemical: niacin; Chemical: lovastatin
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:
 Chemical: niacin; Chemical: lovastatin