Although OMEGA-3 in fish oil has the effect of assisting in lowering blood pressure, it has limited effect and cannot be taken as a single antihypertensive drug. Therefore, when blood pressure rises, oral antihypertensive drugs should be taken under the guidance of a physician to control blood pressure. Relevant studies have indicated that fish oil contains high OMEGA-3 content, i.e., polyunsaturated fatty acids, and consumption of >3g per day can lead to a decrease in blood pressure values in hypertensive patients who are not treated with other medications at the same time. Other studies have shown that OMEGA-3 intake, can lead to a decrease in both systolic and diastolic blood pressure in hypertensive patients. However, for patients with significantly elevated blood pressure, fish oil can only provide a slight control and cannot replace regular antihypertensive drugs. Therefore, when diagnosed with hypertension, oral antihypertensive drugs, such as diuretics, beta-blockers, calcium channel blockers, angiotensin-converting enzyme inhibitors, etc., should be taken under the guidance of a physician, supplemented by a healthy lifestyle, such as a low-salt, low-fat diet and appropriate exercise.