Effect of jujube and thyme on essential hypertension (2) Design: Drug and placebo will be given to cross for 2 months in 36 patients participating in the study in age range 30 to 75 years is prescribed. (3) How to do: the patients divid into two groups of 18 persons. First, 10 mg of drug twice daily will be give to a group of patients and the other group will be give 10 mg of placebos group daily for 2 months. During the project once every two weeks blood pressure will be measured.(4) participants: 24 women and men in the age range 30 to 70 years old and the first and second stages of developing hypertension who referred to special clinics of Zanjan University of Medical Sciences and without conditions such as secondary hypertension, signs of organ damage at the end of the 6 months prior to the study, a sudden increase in blood pressure over 15 mm Hg, patient's blood pressure greater than or equal to 180/110 mm Hg, a variety of cardiac arrhythmias, diseases symptomatic valvular heart disease, impaired liver function, pregnancy or breast-feeding (5) interventions: drug and placebo (6) The main outcome variables : Mezaj ,Height,Weight, Age, Sex, Marital status, Occupation, etc. are also investigated