Beetroot Extract and medications.
Beetroot Extract is in the Distil supplement database, evidence Grade B. The page below lists every medication we have explicitly assessed it against.
Beetroot extract is standardised for dietary nitrate, which oral bacteria convert to nitrite and then to nitric oxide in low-oxygen vascular tissue. This is a separate route to the L-Arginine pathway, so the two can stack. Doses deliver 300 to 600mg of nitrate a day, with the acute effect peaking at two to three hours and at least four weeks needed for sustained blood pressure benefit. Evidence is Grade B for acute blood pressure and endothelial function, with meta-analyses showing systolic drops of around 5 mmHg, larger in people with hypertension; the chronic effect in adults over 50 looks weaker, so set expectations accordingly. The interaction angle matters: it adds to the effect of antihypertensives and may cause symptomatic low blood pressure early on, it shares a pathway with PDE5 inhibitors, and it needs cardiologist awareness alongside Class Ic antiarrhythmics like flecainide. Antibacterial mouthwash within two hours abolishes the effect. One firm exclusion sits outside the blood-pressure picture: beetroot is high in oxalate, so it should be avoided by anyone with a history of calcium-oxalate kidney stones, in line with EAU advice to restrict dietary oxalate in stone formers. Harmless red urine is common. A solid blood-pressure adjunct, not a standalone fix.
Below are the 16 documented pairs we have explicitly assessed for Beetroot Extract: 16 amber. The pairs cluster around 3 mechanisms: Additive blood-pressure lowering, Additive vasodilation, and Haemodynamic interaction (narrow therapeutic window). Every call is cited to either a clinical reference (PMID) or the British National Formulary. Anything not listed here is either still to be assessed or beyond our database scope. The checker beneath surfaces assessments by medication, and the missing-item form at the bottom of the page routes any uncatalogued medication into our next curation pass.
Documented interactions
Last reviewed 15 June 2026. Each interaction below lists the evidence its assessment drew on: some rest on studies of the exact pair, others on mechanism evidence, where a citation may support one part of the reasoning rather than the exact combination. The evidence line on each entry says which.
Additive blood-pressure lowering
Amber Does interact with Amlodipine?
Beetroot lowers blood pressure through the nitric oxide pathway. Amlodipine lowers blood pressure through calcium-channel blockade in vascular smooth muscle. Both mechanisms cause vasodilation, so the combined effect tends to be larger than either alone. Watch for dizziness on standing or ankle swelling, especially in the first two weeks. If symptoms appear, tell your GP.
Evidence: Limited human data, based on case reports and a known mechanism.
Amber Does interact with Bisoprolol?
Beetroot lowers blood pressure through the nitric oxide pathway, and bisoprolol lowers blood pressure through beta-1 receptor blockade. Used together, the combined blood-pressure effect is mild but real. Watch for dizziness on standing, especially in the first two weeks. If symptoms appear, tell your GP.
Evidence: Limited human data, based on case reports and a known mechanism.
Amber Does interact with Candesartan cilexetil?
Beetroot lowers blood pressure through the nitric oxide pathway. Candesartan lowers it by blocking the angiotensin II receptor. Used together, the combined blood-pressure effect tends to be larger than either alone. Watch for dizziness on standing, especially in the first two weeks. If symptoms appear, tell your GP.
Evidence: Limited human data, based on case reports and a known mechanism.
Amber Does interact with Clonidine?
Beetroot lowers blood pressure through the nitric oxide pathway, and clonidine lowers it by reducing the nerve signals that drive blood pressure up. Used together, the combined effect tends to be a little larger than either alone. Watch for dizziness on standing, especially in the first two weeks. If symptoms appear, tell your GP.
Evidence: Limited human data, based on case reports and a known mechanism.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
Amber Does interact with Diltiazem hydrochloride?
Beetroot lowers blood pressure through the nitric oxide pathway. Diltiazem lowers blood pressure through calcium-channel blockade and also slows the heart rate. Used together, the combined blood-pressure effect tends to be larger than either alone. Watch for dizziness on standing in the first two weeks. If symptoms appear, tell your GP.
Evidence: Limited human data, based on case reports and a known mechanism.
Amber Does interact with Guanfacine?
Beetroot lowers blood pressure through the nitric oxide pathway, and guanfacine lowers it by reducing the nerve signals that drive blood pressure up. Used together, the combined effect tends to be a little larger than either alone. Watch for dizziness on standing, especially in the first two weeks. If symptoms appear, tell your GP.
Evidence: Limited human data, based on case reports and a known mechanism.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
Amber Does interact with Lisinopril?
Beetroot lowers blood pressure through the nitric oxide pathway. Lisinopril lowers it by blocking the angiotensin-converting enzyme. Used together, the combined blood-pressure effect tends to be larger than either alone. Watch for dizziness on standing, especially in the first two weeks. If symptoms appear, tell your GP.
Evidence: Limited human data, based on case reports and a known mechanism.
Amber Does interact with Losartan?
Beetroot lowers blood pressure through the nitric oxide pathway. Losartan lowers it by blocking the angiotensin II receptor. Used together, the combined blood-pressure effect tends to be larger than either alone. Watch for dizziness on standing, especially in the first two weeks. If symptoms appear, tell your GP.
Evidence: Limited human data, based on case reports and a known mechanism.
Amber Does interact with Ramipril?
Beetroot lowers blood pressure through the nitric oxide pathway. Ramipril lowers it by blocking the angiotensin-converting enzyme. Used together, the combined blood-pressure effect tends to be larger than either alone. Watch for dizziness on standing, especially in the first two weeks. If symptoms appear, tell your GP.
Evidence: Limited human data, based on case reports and a known mechanism.
Amber Does interact with Verapamil hydrochloride?
Beetroot lowers blood pressure through the nitric oxide pathway. Verapamil lowers blood pressure through calcium-channel blockade and also slows the heart rate. Used together, the combined blood-pressure effect tends to be larger than either alone. Watch for dizziness on standing in the first two weeks. If symptoms appear, tell your GP.
Evidence: Limited human data, based on case reports and a known mechanism.
Additive vasodilation
Amber Does interact with Glyceryl trinitrate?
Taking beetroot with glyceryl trinitrate (GTN) can add up their blood-pressure-lowering effects, so you may notice more dizziness, lightheadedness or a headache, particularly when a GTN spray or patch is working, because both act on the nitric oxide pathway (GTN as an organic nitrate, beetroot by a different route). This is additive rather than the dangerous amplified drop seen when nitrates are combined with erection medicines such as sildenafil. Keep your beetroot intake steady and tell your GP or cardiologist you take it.
Evidence: Based on an established mechanism, with no direct study of this exact combination yet.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
Amber Does interact with Isosorbide mononitrate?
Taking beetroot with isosorbide mononitrate can add up their blood-pressure-lowering effects, so you may notice more dizziness, lightheadedness or a headache, because both act on the nitric oxide pathway (the nitrate directly, beetroot by a different route). This is additive rather than the dangerous amplified drop seen when nitrates are combined with erection medicines such as sildenafil. Keep your beetroot intake steady and tell your GP or cardiologist you take it.
Evidence: Based on an established mechanism, with no direct study of this exact combination yet.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
Amber Does interact with Nicorandil?
Taking beetroot with nicorandil can add up their blood-pressure-lowering effects, so you may notice more dizziness, lightheadedness or a headache, because both act on the nitric oxide pathway (nicorandil partly as a nitrate, beetroot by a different route). The combined effect tends to be mild, but tell your GP or cardiologist you take beetroot and keep your intake steady.
Evidence: Based on an established mechanism, with no direct study of this exact combination yet.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
Amber Does interact with Sildenafil (Erectile Dysfunction)?
Sildenafil and beetroot both increase nitric-oxide-driven vasodilation, by different routes. Prescription organic nitrate medications (GTN spray, isosorbide) are strictly contraindicated with sildenafil because of severe blood pressure drops. Beetroot acts through the same downstream nitric oxide pathway but produces much lower nitric oxide levels than prescription nitrates. The theoretical risk is additive vasodilation and symptomatic low blood pressure. Tell your GP if you take both.
Evidence: Based on an established mechanism, with no direct study of this exact combination yet.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
Amber Does interact with Tadalafil?
Tadalafil and beetroot both increase nitric-oxide-driven vasodilation, by different routes. Prescription organic nitrate medications (GTN spray, isosorbide) are strictly contraindicated with tadalafil because of severe blood pressure drops. Beetroot acts through the same downstream nitric oxide pathway but produces much lower nitric oxide levels than prescription nitrates. The theoretical risk is additive vasodilation and symptomatic low blood pressure. Tell your GP if you take both.
Evidence: Based on an established mechanism, with no direct study of this exact combination yet.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
Haemodynamic interaction (narrow therapeutic window)
Amber Does interact with Flecainide acetate?
Flecainide is a Class Ic antiarrhythmic with a narrow therapeutic window and is sensitive to blood pressure and electrolyte changes. Beetroot lowers blood pressure through the nitric oxide pathway, which can stack with flecainide's haemodynamic profile. At standard supplement doses the combined effect tends to be mild, but the narrow safety margin of flecainide means you should let your cardiologist know if you start beetroot. Do not stack beetroot with hibiscus, garlic, L-citrulline and high-dose magnesium at the same time if you are on flecainide.
Evidence: Based on an established mechanism, with no direct study of this exact combination yet.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
What this list does not say. Pairs not flagged here are not implicitly safe. They are either not yet in our database, or fall outside our inclusion scope. Use the checker below to surface any medication, and submit a missing item if you take something we have not catalogued.
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How we grade severity, choose what's in scope, and what we exclude.
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The free checker answers one interaction question at a time. A Distil report reviews the bigger picture: your goals, diet, medications, current supplements and any blood results you provide, then shows what appears worth keeping, changing, adding or leaving out.
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The interaction check is one section of the full report. You also get the reasoning behind each recommendation and the evidence references used.
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