You hear that aspirin “thins the blood,” then wonder if it might help bring down your blood pressure too. It’s an understandable connection to make. But aspirin and blood pressure affect different things, and that’s the part that’s easy to miss.
Aspirin isn’t a blood pressure medicine. It can make certain blood clots less likely to form, but it doesn’t lower the force of blood pushing against your artery walls. That force is what a blood pressure reading measures.
What does aspirin do?
When people say aspirin “thins the blood,” they usually mean it makes platelets, tiny blood cells, less likely to stick together and form certain clots. A healthcare professional may recommend it to some people for clot prevention, but that doesn’t mean aspirin treats high blood pressure. The NHS guide to aspirin explains its uses and risks.
This distinction matters because a medicine can support heart health without lowering your blood pressure. If your readings are high, aspirin isn’t a substitute for a blood pressure treatment plan.
Why have you heard that aspirin might lower blood pressure?
You may have come across claims about taking aspirin at bedtime. Researchers have explored whether the timing of a dose can affect blood pressure readings, and some findings have suggested a possible difference. But that doesn’t make aspirin a proven way to manage high blood pressure. A review of aspirin and blood pressure in people with hypertension found no meaningful overall blood pressure-lowering effect.
So don’t start taking aspirin, or change the time you take a prescribed dose, to try to lower your numbers. If aspirin has been recommended for you, ask the healthcare professional who prescribed it before making any changes.
Should you take aspirin if you have high blood pressure?
Not for the purpose of lowering it. Aspirin may be recommended for certain people to help prevent blood clots, but it isn’t right for everyone and can increase the risk of bleeding. Taking it every day without medical advice may create risks without helping your blood pressure.
If you already take aspirin because it was prescribed, don’t stop or change your dose on your own. The reason you take it matters, so check with your healthcare professional if you have questions.
What should you do if your reading is high?
A high reading can be unsettling, especially if you were hoping aspirin might help. Sit quietly and check again using the instructions that came with your Smart Blood Health monitor. One reading is only a snapshot, so keeping a record can help you see what your readings are doing over time and give your doctor a clearer picture.
The Smart Blood Health monitor stores your readings in the app, where you can review your history and share it with your doctor when needed.
So, does aspirin lower blood pressure?
For most people, no. Aspirin can affect how blood clots form, but it isn’t a treatment for high blood pressure. If you’re concerned about your readings, keep a record and ask a healthcare professional what they mean for you.