The purpose of this study is

1. To determine whether the Gastrodia and Uncaria Drink is effective in the treatment of masked hypertensive patients below 70 years.
2. To find out the suitable groups for the Gastrodia and Uncaria Drink treatment.

Inclusion Criteria:

• age between 18 to 70 years
• didn't use any anti-hypertension drugs within 2 weeks
• stage 1 masked hypertensive patients, which means clinic blood pressure<140/90 mmHg,however the daytime(8:00-18:00) 24h ambulatory blood pressure between 135/85 and 150/95mmHg
• be willing to participate in the trials and able to finish clinic visit

Exclusion Criteria:

• secondary hypertension
• be allergic to the clinical trial medicine
• occurrence of stroke, CKD, myocardial infarction within 2 years
• dysfunction of liver or kidney and fundus hemorrhage
• arrhythmia
• ALT, AST, TBL upper the twice of normal range, Scr≥2.0mg/dl, K+≥5.5mmol/L, Urine protein≥2+
• psychiatric disorders
• pregnant, breastfeeding
• other serious conditions in which is not fit for the study