Blood pressure down but then dizziness first need to clarify the causes, such as blood pressure drop too fast, adverse drug reactions, cervical spondylosis, etc., according to the cause to be targeted treatment. 1. Blood pressure drop too fast: due to the blood pressure drop is too large, resulting in insufficient blood supply to the brain, dizziness, panic and other symptoms, then you need to drink more water, reduce the dose of antihypertensive drugs. 2. Adverse drug reactions: after applying nifedipine, amlodipine and other drugs, dizziness and other adverse reactions may occur, at this time you need to adjust the drug appropriately. 3. Cervical spondylosis: cervical spondylosis can also cause dizziness, and at this time, it is necessary to perform cervical spine CT and other checks, to be traction, massage, and in severe cases, surgical treatment. Dizziness after a drop in blood pressure is recommended to go to a regular hospital for a detailed examination to determine the cause of the disease, and according to the cause of the disease to be corresponding treatment.