3781
Mean systolic blood pressure decreased 25 mmHg and mean diastolic blood pressure declined 15 mmHg after one month of timolol - hydrochlorothiazide therapy ( P less than 0 . 01 , both comparisons ) .
 Chemical: timolol; Chemical: hydrochlorothiazide
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: timolol; Chemical: hydrochlorothiazide