Supplements and Blood Pressure Medications: What to Know
If you’re one of the nearly 120 million U.S. adults living with high blood pressure, you’re not alone. According to the CDC, close to half of all American adults have hypertension, and more than half of those diagnosed are currently taking medication to manage it (CDC, NCHS Data Brief No. 511, October 2024).¹ At the same time, research shows that between 40% and 60% of adults with chronic conditions also use dietary supplements (American Family Physician, 2017).²
That overlap creates a question many people are asking but few feel confident answering: Can I take my supplements alongside my blood pressure medication?
The short answer is that many supplements can be taken safely with antihypertensive medications, but some require extra awareness. Certain supplements may amplify the blood pressure lowering effects of your medication, while others can work against it. The key is knowing which combinations deserve closer attention and having a pharmacist or healthcare provider help you navigate them.
Why Supplement and Medication Awareness Matters for Blood Pressure
Blood pressure medications work in carefully calibrated ways. ACE inhibitors, ARBs, beta-blockers, calcium channel blockers, and diuretics each target different mechanisms in your cardiovascular system to help bring your numbers into a healthy range. When a supplement either intensifies or counteracts those mechanisms, the result can range from mild dizziness to something more serious.
A comprehensive review published in Cureus (2025)³ found that between 23% and 82.5% of older adults use dietary supplements and prescription medications at the same time, and that a critical gap in patient-provider communication makes those risks harder to catch. The review emphasized that clinicians often do not ask about supplement use, and patients often do not volunteer the information.
This is exactly why we built RYOS around the principle of medication awareness. Every RYOS product is pharmacist reviewed to identify known drug-nutrient interactions, so you can start the conversation with your healthcare provider from a more informed place.
Supplements That May Interact With Blood Pressure Medications
Not all interactions are harmful, and not all are predictable. But the following supplement categories have enough clinical evidence behind them to warrant a closer look if you take antihypertensive medications.
Potassium
Potassium is one of the most important minerals for cardiovascular health, but supplementing with it while taking ACE inhibitors or ARBs requires caution. These medications reduce the excretion of potassium through the kidneys by blocking aldosterone, which means your potassium levels can rise. Adding a potassium supplement on top of that can push levels into a range called hyperkalemia, which may cause muscle weakness, fatigue, or in severe cases, irregular heart rhythms (Cleveland Clinic Journal of Medicine, 2019; StatPearls, 2025).⁴
The Journal of Clinical Hypertension (2006)⁵ noted that potassium supplements and even potassium-rich salt substitutes increase the likelihood of developing hyperkalemia when combined with an ACE inhibitor or ARB. If you take these medications, your provider should be monitoring your potassium levels, and any supplementation should happen under their guidance.
CoQ10 (Coenzyme Q10)
CoQ10 is a popular supplement for heart health, and there is research to support its benefits. A meta-analysis of 26 randomized controlled trials published in the Journal of Clinical Nutrition (2022)⁶ found that CoQ10 supplementation significantly reduced systolic blood pressure by an average of 4.77 mmHg in patients with cardiometabolic conditions. The researchers observed that the most effective doses ranged from 100 to 200 mg per day.
That blood pressure lowering effect is generally positive, but it also means that combining CoQ10 with antihypertensive medications may produce an additive reduction. According to Drugs.com (2026)⁷, CoQ10 can modestly lower blood pressure on its own, and when paired with ACE inhibitors, ARBs, beta-blockers, calcium channel blockers, or diuretics, the combined effect could lead to blood pressure dropping lower than intended, potentially causing dizziness, lightheadedness, or fainting.
CoQ10 is not considered dangerous with blood pressure medications for most people, but it does call for monitoring, especially in the first few weeks after starting supplementation.
Fish Oil and Omega-3 Fatty Acids
Fish oil is one of the most widely used supplements in the United States, and its cardiovascular benefits are well documented. A meta-analysis of 31 placebo-controlled trials found that omega-3 fatty acids produced a mean blood pressure reduction of 3.0/1.5 mmHg, with a clear dose-response relationship (Current Atherosclerosis Reports, 1993 meta-analysis).⁸ The effect was most pronounced in individuals with existing hypertension.
Because fish oil has its own modest blood pressure lowering effect, taking it alongside antihypertensive medication can produce an additive drop. For most people, this is manageable and may even be beneficial. However, individuals who are prone to dizziness or lightheadedness should be mindful. Additionally, high doses of omega-3s may thin the blood, which is worth discussing with your provider if you are also taking blood thinners.
Licorice Root
Licorice root is one supplement that can directly work against blood pressure medications. The active compound, glycyrrhizic acid, affects an enzyme in the kidneys that regulates fluid balance, which can cause the body to retain sodium and water while losing potassium. The result is elevated blood pressure.
A randomized crossover study published in the American Journal of Clinical Nutrition (2024)⁹ by researchers at Linköping University found that even a small daily intake containing just 100 mg of glycyrrhizic acid raised blood pressure by an average of 3.1 mmHg in healthy young adults. A broader review in Foods (2019)¹⁰ reported that across 18 to 26 studies, licorice intake was associated with systolic blood pressure increases of approximately 5.45 mmHg.
If you take medication to lower your blood pressure, licorice root can undermine that effort. The American Heart Association, Mayo Clinic, and Cleveland Clinic all advise avoiding licorice root supplements when managing hypertension.
St. John’s Wort
St. John’s Wort is commonly used for mood support, but it interacts with a wide range of medications, including some used to manage blood pressure. According to the Mayo Clinic (2026)¹¹, St. John’s Wort can weaken the effectiveness of many heart medications by accelerating how the liver metabolizes them. The GoodRx health resource (2026) also notes that combining St. John’s Wort with certain substances can, in some cases, lead to elevated blood pressure.
Because of the breadth and unpredictability of its interactions, St. John’s Wort is one of the supplements that most healthcare providers recommend discussing before starting, especially if you are on a multi-drug regimen.
Ginseng
Ginseng is widely used for energy and immune support, but research suggests it can affect blood pressure in both directions. The Mayo Clinic (2026)¹¹ lists ginseng among herbal supplements that may interfere with blood pressure medications. Some studies suggest it may raise blood pressure, while others show a modest lowering effect. That inconsistency makes it difficult to predict how ginseng will interact with a specific antihypertensive regimen.
If you’re considering ginseng, it’s worth having a conversation with your pharmacist or provider about how it may affect your particular medication plan.
Supplements That Are Generally Compatible With Blood Pressure Medications
While the supplements above deserve careful attention, there are several commonly used supplements that research suggests are generally safe alongside most antihypertensive medications.
Vitamin D
Vitamin D is one of the most widely used supplements, and research indicates that it can typically be taken alongside ACE inhibitors, beta-blockers, diuretics, and calcium channel blockers without harmful interactions (Doctronic, 2026).¹² Studies have also shown that vitamin D deficiency is common among adults with hypertension, affecting up to 40% of that population. While some epidemiological research suggests a relationship between low vitamin D levels and elevated blood pressure (Nutrients, 2025),¹³ interventional studies have produced mixed results, and vitamin D supplementation alone is not considered a treatment for hypertension.
One consideration: high doses of vitamin D (above 4,000 IU daily) can increase calcium absorption, so if you take a calcium channel blocker, it’s worth mentioning your vitamin D dosage to your provider.
Magnesium
Magnesium plays a role in blood vessel relaxation and has been studied as a complementary approach for blood pressure management. A systematic review and meta-analysis published in BMC Medicine (2024)¹⁴ found that calcium, magnesium, and vitamin D supplementation may support blood pressure management as complementary therapies. StatPearls (2025)⁴ notes that magnesium may enhance the blood pressure lowering effect of ACE inhibitors, particularly in patients with low magnesium levels, so periodic monitoring of blood pressure and electrolytes is recommended.
For most people, magnesium at standard supplemental doses is well tolerated alongside blood pressure medications. The key is awareness and communication with your provider.
What to Watch For: Signs That a Supplement May Be Affecting Your Blood Pressure
When you add a new supplement to an existing medication regimen, your body may respond in subtle ways. Some signs worth paying attention to include: feeling lightheaded or dizzy when standing up, which may suggest your blood pressure is dropping too low; unusual fatigue or muscle weakness, which could point to electrolyte shifts, especially potassium; headaches or a feeling of pressure, which may indicate your blood pressure is rising; and swelling in the ankles or feet, which can signal fluid retention.
None of these symptoms should cause alarm on their own, but they are worth mentioning to your healthcare provider. Keeping a simple log of when you start a new supplement and how you feel in the days that follow can make those conversations more productive.
The RYOS Approach: Medication Awareness by Design
At RYOS, we believe that wellness should never require guesswork, especially when medications are involved. That’s why every RYOS supplement is pharmacist reviewed to screen for known drug-nutrient interactions before it ever reaches your hands.
Our formulations are designed with medication awareness at their core. We review ingredient profiles against common medication categories, including antihypertensives, and we are transparent about what we find. This doesn’t replace the relationship you have with your healthcare provider. It strengthens it. When you bring a RYOS product to your next appointment, you’re bringing a supplement that has already been through a layer of clinical review. You can check RYOS products against common medication categories in our pharmacist-reviewed charts.
Because confidence in your wellness routine starts with clarity about what’s in it and how it fits with everything else you take.
Key Takeaways
Many supplements can be taken safely with blood pressure medications, but certain combinations require closer attention. Potassium supplements paired with ACE inhibitors or ARBs can raise potassium to unsafe levels. CoQ10, fish oil, and magnesium may enhance blood pressure lowering effects, which is usually manageable but calls for monitoring. Licorice root and St. John’s Wort can work against your medications or interact unpredictably, and most experts recommend avoiding them if you have hypertension. Vitamin D is generally well tolerated with most antihypertensives.
The most important step you can take is to share your full supplement list with your pharmacist or healthcare provider. They can help you identify which combinations are safe, which ones need monitoring, and which ones to avoid.
Reviewed by Sunny Chow, RPh, Registered Pharmacist
Contributing author, Kyle Chu
This article is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider or pharmacist before making changes to your medication or supplement regimen.
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