By SterlingMedicalCenter.org Editorial Team. SterlingMedicalCenter.org is an independent editorial publication. It is not a medical practice or healthcare provider and is not affiliated with any medical practice, clinic or healthcare organization. This article is general education, not medical advice. Source pages were opened and read on October 3, 2026.
The Short Answer
Maybe, but not on your own. Two things make CBD and blood pressure medicine worth a conversation first. CBD may lower blood pressure by itself, which can stack on top of your medicine. CBD can also change how your liver handles some drugs. Whether either one matters for you depends on your specific medicine, your doses, your CBD product and your health.
The safest next step is to ask your prescriber or pharmacist before you start. Do not stop or change your blood pressure medicine on your own. The American Heart Association tells people never to change a dose or stop a medication without checking with their healthcare professional.
Why CBD and Blood Pressure Medicine Can Matter Together
1. Blood pressure can drop too far
A SingleCare guide written by a pharmacist notes that research has found CBD can lower blood pressure. Taken with blood pressure medicine, that could mean low blood pressure, fainting and falls. It says people on ACE inhibitors, beta blockers or diuretics may need to monitor their blood pressure while using CBD.
One small randomized trial gives a sense of the size of the effect. It gave 600 mg of CBD or a placebo to 26 healthy men. After a single dose, mean arterial pressure at rest was about 2 mmHg lower than with placebo. That resting effect was not seen after seven days of dosing. Systolic pressure was lower during a stress test after both single and repeated doses. The men were healthy and not on regular medications, so the study cannot tell us what happens when CBD is added to blood pressure treatment.
2. Your liver may process your medicine differently
Harvard Health explains that many drugs are broken down by liver enzymes, and CBD may compete with or interfere with those enzymes. That can leave too much or too little of a medicine in the body. These interactions are usually hard to predict and can sometimes be serious. SingleCare adds that CBD is itself processed by the same enzyme family and can block enzymes that handle other drugs.
Harvard's examples of potentially serious interactions were warfarin, amiodarone, levothyroxine and several seizure medicines. It did not single out blood pressure drugs. The sources reviewed for this article do not give a drug-by-drug list for blood pressure medicines, which is why your pharmacist's check of your exact medicine matters.
3. Products vary, and so does absorption
Harvard notes that CBD products are not regulated or checked for purity, concentration or safety. It also says the form matters. Edibles absorb more slowly than inhaled CBD. Creams and lotions may not reach the blood in amounts that interact with other drugs, though little is known about how much gets through.
Blood Pressure Medicine Classes at a Glance
This is a reading aid, not a prediction of what will happen to you. It lists only what the sources reviewed support. Where they are silent on a class, it says so.
- Calcium channel blockers (examples listed by the American Heart Association: amlodipine, diltiazem, verapamil)
- How they work: they keep calcium out of heart and artery muscle cells, which relaxes narrowed vessels. Some also slow the heart rate.
- What the sources say about CBD: the sources reviewed do not address this class specifically. The general question of added blood pressure lowering still applies, and your pharmacist can check whether your exact drug is a concern.
- What to watch: the AHA lists dizziness and slow heart rate among side effects of the class. Ask whether your clinician wants you to track your pulse as well as your blood pressure.
- Beta blockers (examples: atenolol, carvedilol, metoprolol, propranolol)
- How they work: they lower the heart rate, which can lower blood pressure. Some also help relax blood vessels.
- What the sources say about CBD: SingleCare names beta blockers among the medicines where blood pressure monitoring may be needed with CBD.
- What to watch: home blood pressure readings, dizziness and slow heartbeat. The AHA lists the last two as possible side effects of the class.
- Angiotensin II receptor blockers, or ARBs (examples: losartan, valsartan, olmesartan)
- How they work: they block the effects of angiotensin, a chemical that narrows arteries, so vessels stay open.
- What the sources say about CBD: the sources reviewed do not address ARBs and CBD directly. SingleCare names the related ACE inhibitors, not ARBs.
- What to watch: the AHA lists low blood pressure as a possible side effect of the class, so lightheadedness and low readings are the signals to track.
- Diuretics, often called water pills (examples: hydrochlorothiazide, furosemide, spironolactone)
- How they work: they help the body get rid of extra salt and water, which helps control blood pressure.
- What the sources say about CBD: SingleCare names diuretics among the medicines where blood pressure monitoring may be needed with CBD.
- What to watch: home readings and dizziness. The AHA also lists dehydration and changes in blood sodium and potassium as possible side effects of the class, so ask whether any follow-up blood tests make sense.
- Also worth knowing: ACE inhibitors (examples: lisinopril, enalapril). SingleCare names this class too. The AHA lists dizziness, fainting and low blood pressure among its possible side effects.
Some people take two or more blood pressure medicines combined in one pill, according to the AHA. If that is you, give your pharmacist the full name of the pill so every ingredient gets checked.
What to Watch If You and Your Clinician Decide to Try CBD
- Blood pressure at home. Ask how often to check and which readings should prompt a call.
- Dizziness, fainting or falls. SingleCare links fainting and falls to low blood pressure when CBD is combined with blood pressure medicine.
- Drowsiness, nausea, diarrhea or dry mouth. Harvard lists these as known CBD side effects. It also notes rare liver damage.
- Other sedating substances. Harvard notes that alcohol and certain medicines and supplements can add to sleepiness when combined with CBD.
If you faint or feel severely unwell, seek urgent medical care rather than waiting for an appointment.
Who Should Be Extra Careful
Harvard says older adults are more susceptible to drug interactions because they often take multiple medications and their bodies process drugs differently. It also advises telling your doctor about CBD use if you have liver disease, kidney disease, epilepsy, heart issues or a weakened immune system. SingleCare adds that people taking several medications face a higher interaction risk.
Printable Pharmacist Question Sheet
Print this page or copy this section to take to your appointment.
Bring with you: a list of everything you take (prescription, over-the-counter, herbal and supplements), the full names of your blood pressure medicines, and the CBD product itself or a photo of its label, including the form (oil, gummy, capsule or topical) and the milligrams per serving.
- Is any medicine I take known to be affected by CBD, either by adding to blood pressure lowering or by how my liver processes it?
- Does my blood pressure medicine have any food or grapefruit warning, and does that change your advice about CBD?
- Does the form of CBD (oil, edible or topical) change the risk for me?
- How often should I check my blood pressure at home, and what readings should make me call you?
- Which symptoms should I treat as a reason to stop CBD and contact someone right away?
- Do I have a health condition, such as liver, kidney or heart disease, that raises the risk?
- Does anything else I take, including alcohol, add to drowsiness or low blood pressure?
- Do any of my medicines need follow-up blood tests if I use CBD?
- CBD products are not checked for purity or strength. How should I read a label or lab report?
- Will you note my CBD use in my record so everyone treating me knows?
What to Do Next
- Write down every medicine and supplement you take, including the exact names of your blood pressure drugs.
- Ask your pharmacist or prescriber the questions above before starting CBD.
- Keep taking your blood pressure medicine exactly as prescribed.
- If you and your clinician agree to try CBD, keep notes on your readings and how you feel.
- If you faint or feel severely unwell, get urgent medical care. If your readings are outside the range your clinician gave you, contact your clinician.
If you are specifically weighing gummies, our CBD gummies safety guide on drug interactions and when to consult a physician discusses CBD gummies and drug interactions more broadly.
Limits of This Article
The research here is general and limited. The one trial cited involved 26 healthy men, and no source we reviewed tests CBD against each blood pressure drug. Nobody at this site has examined you or reviewed your medicines. Your pharmacist or prescriber can look at your actual medicines, doses and health history, which this article cannot do.
Sources
- Harvard Health Publishing, Katsiaryna Bykov, PharmD, ScD. CBD and other medications: Proceed with caution. January 11, 2021.
- SingleCare, Gerardo Sison, Pharm.D. Is it safe to mix CBD with your meds? Updated December 5, 2022.
- Sultan SR, O'Sullivan SE, England TJ. The effects of acute and sustained cannabidiol dosing for seven days on the haemodynamics in healthy men: a randomised controlled trial. British Journal of Clinical Pharmacology, 2020;86(6):1125–1138.
- American Heart Association. Types of Blood Pressure Medications. Last reviewed August 14, 2025.