Hypertension is the disease with the highest prevalence in Indonesia. Prevalence of hypertension in the elderly aged 55-75 years and above, which is 62.63% of the overall percentage of people with hypertension. However, many elderly people are not aware and responsive to the treatment of hypertension. The use of anti-hypertensive drugs is often not taken with good procedures. The purpose of this study was to determine the effectiveness and side effects of anti-hypertensive drugs consumed by the elderly in Kalijaga. Sampling using purposive sampling technique with a sample of 30 respondents with blood pressure criteria ≥140/90 mm Hg. Data analysis used wilcoxon and chi-square tests. The results showed a significant effectiveness after the administration of anti-hypertensive drugs as shown by 26 people reaching the target blood pressure therapy. Many of the side effects felt were derived from the use of anti-hypertensive drugs.