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Patient Guidance
Your Heart Medications
& Dental Treatment
If you take blood-thinning or antiplatelet medication, you may have questions before your dental appointment. This guide explains what to expect, when it is safe to proceed, and how to have an informed conversation with both your dentist and your cardiologist.
Estimated reading time: 8 minutes
Key Principles
The Golden Rule: Do Not Stop Your Medication Without Advice
- For the vast majority of dental procedures, it is safer to continue your cardiac medication than to stop it. Stopping unnecessarily carries a real risk of heart attack, stroke, or stent thrombosis.
- Bleeding after dental work is almost always controllable with local measures. A heart attack or stroke caused by stopping blood thinners is a far more serious event.
- Your dentist is trained to manage bleeding in patients on anticoagulants and antiplatelet drugs — modern guidance expects them to treat you without interrupting your medication in most cases.
- Always tell your dentist every medication you take, including aspirin. Never reduce or stop a dose before dental work without first speaking to your cardiologist or GP.
- There are specific situations — particularly in the weeks after a heart stent, or if you have a mechanical heart valve — where the advice is even more emphatic: do not stop under any circumstances without specialist guidance.
Source Guidance
The clinical recommendations on this page are based on the Management of Dental Patients Taking Anticoagulants or Antiplatelet Drugs (SDCEP, 2nd Edition, March 2022) — a NICE-accredited guideline produced by NHS Education for Scotland and endorsed by the Royal Colleges of Surgeons and the College of General Dentistry. They reflect current best practice in the UK.
Your Medications
What the Guidance Says For Each Drug Type
The advice depends on which type of medication you take and the extent of the dental procedure being planned. The categories below cover the most common cardiac medications.
Continue as normal
Aspirin (alone)
e.g. 75 mg daily
If you take aspirin on its own for heart disease, continue taking it as usual before and after dental treatment. Your dentist should proceed without interrupting your medication. Some minor additional bleeding is expected and will be managed with gauze and pressure.
Do not stop — treat without interruption
Continue as normal
Dual Antiplatelet Therapy
Aspirin + clopidogrel, ticagrelor or prasugrel
If you take two antiplatelet drugs together (common after a stent or heart attack), continue both. Your dentist should expect some prolonged bleeding and will take extra care with stitching and packing. Stopping either drug — especially in the months after a stent — carries serious cardiac risk.
Do not stop — consult cardiologist if dentist advises otherwise
Usually continue; adjust only for major surgery
Direct Oral Anticoagulants (DOACs)
Apixaban (Eliquis), rivaroxaban (Xarelto), dabigatran (Pradaxa), edoxaban (Lixiana)
For routine dental procedures (fillings, scale-and-polish, simple extraction), continue your DOAC as normal. For more complex procedures such as multiple extractions or dental implant surgery, you may be asked to miss or delay your morning dose on the day — but the drug is resumed the same evening. You should never stop it for several days.
For major procedures: miss morning dose only; resume same evening
Continue if INR is controlled
Warfarin
Also acenocoumarol, phenindione
If your INR (blood clotting level) is within your normal therapeutic range and below 4.0, continue warfarin and proceed with dental treatment. Your INR should ideally be checked within 24–72 hours before the procedure. If your INR is 4.0 or above, non-urgent dental work should be deferred until it is back within range.
Continue if INR <4 — check INR 24–72 hrs before procedure
Specialist advice needed
Anticoagulant + Antiplatelet Combination
e.g. Warfarin or DOAC plus aspirin and/or clopidogrel
Taking both an anticoagulant and an antiplatelet drug together (sometimes prescribed after a valve replacement or complex coronary procedure) carries a higher bleeding risk. Your dentist should consult your prescribing cardiologist or GP before proceeding with any invasive treatment to agree a safe plan.
Dentist should discuss with your cardiologist before invasive work
Low dose: continue as normal
Injectable Blood Thinners (LMWHs)
Dalteparin (Fragmin), enoxaparin (Clexane), tinzaparin
If you are on a low (prophylactic) dose, dental treatment can proceed without interruption. If you are on a higher treatment dose (e.g. for a recent clot or bridging therapy), your dentist should seek advice from your specialist before proceeding.
Low dose: treat normally — high dose: consult prescriber first
Absolute Rule
Situations Where Medication Must Never Be Stopped
In the following situations, anticoagulant or antiplatelet therapy must not be interrupted for dental work under any circumstances. Even a brief lapse in treatment carries risk of catastrophic events.
Do not stop anticoagulant or antiplatelet therapy if you have any of the following:
- A metallic (prosthetic) heart valve — particularly mitral or aortic mechanical valves
- A coronary stent, particularly within the first 3–6 months of placement
- A pulmonary embolism (PE) or deep vein thrombosis (DVT) within the last three months
- Recent cardioversion for an abnormal heart rhythm, where anticoagulants are required to protect against stroke
In all these situations, the risk of stopping medication — even briefly — far exceeds any risk from dental bleeding. If your dentist asks you to stop your medication in these circumstances, please contact Dr Nijjer's practice before doing so.
Warfarin & Mechanical Heart Valves
Metallic Heart Valves: A Higher Stakes Situation
Patients with mechanical (metallic) heart valves — whether in the mitral or aortic position — are at particularly high risk of valve thrombosis if anticoagulation is reduced or interrupted. This is why the guidance is emphatic: warfarin should not be stopped for dental treatment.
Why the Risk is So High
Metallic heart valves are highly thrombogenic — meaning blood naturally wants to clot on their surface. Warfarin prevents this. If the INR falls too low, or warfarin is stopped, a clot can form on the valve within hours to days.
A mitral valve thrombosis is particularly dangerous because the mitral valve handles the main flow of oxygenated blood from the lungs into the heart. A clot here can obstruct this flow, causing acute heart failure or a stroke, and can be rapidly fatal without emergency surgery.
The risk is higher for mitral valves than for aortic valves, and higher for older ball-and-cage type valves than for modern bileaflet valves — but no mechanical valve is safe without anticoagulation.
For these reasons, warfarin should never be stopped before dental procedures, and any INR instability should prompt urgent communication between your dentist and cardiologist.
Warfarin Before Dental Work: INR Guide
| INR Result | Action |
|---|---|
| Below 2.0 Below therapeutic range | Contact cardiologist INR is subtherapeutic — thrombosis risk is elevated. Inform Dr Nijjer before dental work. |
| 2.0 – 3.9 Therapeutic range (most patients) | Proceed with dental work Continue warfarin. Do not adjust dose. Dentist uses local haemostatic measures. |
| 4.0 or above Above therapeutic range | Defer non-urgent treatment Defer non-urgent dental work. For urgent treatment, refer to secondary dental care. Contact your anticoagulation clinic. |
INR should be checked ideally within 24 hours before a procedure, or within 72 hours if your INR is known to be stable. Never ask your anticoagulation clinic to adjust your warfarin downward simply in advance of dental work without speaking to your cardiologist first.
Note on Bridging Therapy
In the past, some patients with mechanical valves were temporarily switched from warfarin to injectable heparin before dental work. Current evidence does not support this for dental procedures. Bridging therapy for dental work is not routinely recommended and introduces unnecessary risk. If you have been advised to bridge, please discuss this with Dr Nijjer.
Oral Health & Heart Disease
Why Good Dental Hygiene Matters for Your Heart
The relationship between oral health and cardiovascular disease is well established. Keeping your mouth healthy is not merely cosmetic — for cardiac patients, it is an important part of long-term heart health management.
01
Gum Disease and Inflammation
Periodontal (gum) disease causes chronic low-grade inflammation throughout the body. This systemic inflammation contributes to the progression of atherosclerosis — the build-up of fatty deposits in the coronary arteries that underlies heart attack and angina. Treating gum disease reduces the burden of inflammation.
02
Bacteria Entering the Bloodstream
Poor oral hygiene and untreated dental infections allow bacteria to enter the bloodstream (bacteraemia). In patients with damaged or prosthetic heart valves, this can trigger infective endocarditis — a serious infection of the valve lining that requires prolonged hospitalisation and sometimes emergency surgery.
03
Regular Check-Ups Are Protective
Seeing your dentist regularly for check-ups and hygienist appointments means small problems — early decay, gum inflammation, early periodontal disease — are caught and treated before they become serious. Preventing the need for major interventions is especially valuable if you are on blood-thinning medication.
04
Healthy Habits at Home
Brushing twice daily with fluoride toothpaste, flossing or using interdental brushes, and avoiding sugary drinks all reduce your risk of dental disease. Dry mouth — a common side effect of many cardiac medications — increases decay risk, so staying well hydrated and using fluoride rinses can help.
05
Dental Health as Part of Cardiac Review
At your cardiology review appointments, do mention if you have had any dental infections, extractions, or significant dental work since your last appointment. Dental procedures are a known trigger for transient bacteraemia, and this information may be relevant to your ongoing cardiac care.
06
Shared Risk Factors
Smoking, poorly controlled diabetes, and a high-sugar diet are risk factors for both heart disease and periodontal disease. Addressing these modifiable risks benefits both your oral and cardiovascular health simultaneously.
Endocarditis Prevention
Antibiotic Cover Before Dental Work: What NICE Says
Many patients with heart conditions ask whether they need a course of antibiotics before dental work to prevent infective endocarditis. The current position in the UK, based on NICE guidance (CG64, updated 2016), may surprise you.
The Current NICE Position
NICE does not recommend routine antibiotic prophylaxis before dental procedures for patients at risk of infective endocarditis — even those with prosthetic heart valves, a history of endocarditis, or congenital heart disease. This guidance applies across the UK.
The rationale is that the evidence for prophylactic antibiotics preventing endocarditis through dental procedures was found to be weak, and the widespread use of antibiotics carries its own risks including antibiotic resistance and allergic reactions. NICE concluded that the potential harms outweigh the uncertain benefits for routine dental work.
Who Is Considered High Risk?
NICE identifies the following patient groups as at elevated risk of infective endocarditis, and advises these patients — and their treating clinicians — to be particularly vigilant:
- — Patients with a prosthetic (including biological/tissue) heart valve, or a valve repaired with prosthetic material
- — Patients who have had a previous episode of infective endocarditis
- — Certain types of congenital heart disease (unrepaired or palliated cyanotic defects, repaired defects with residual lesions)
- — Cardiac transplant patients who develop valvulopathy
What You Should Do Instead
NICE emphasises that for high-risk patients, the most important protection against endocarditis is maintaining excellent oral hygiene:
- — Attend regular dental check-ups and hygienist appointments — do not delay dental care out of fear
- — Brush teeth twice daily and use interdental brushes or floss — this reduces the background level of bacteria in the mouth
- — Tell your dentist about your heart condition at every appointment so they have an accurate medical history
- — Be alert to symptoms of endocarditis — unexplained fever, night sweats, new murmur or fatigue after a dental procedure — and seek prompt medical assessment
A note on individual clinical judgement: NICE guidance represents national best practice but does not override an individual clinician's assessment. In some circumstances — for example, if you are undergoing a complex invasive dental procedure and have had previous endocarditis — your cardiologist may exercise clinical judgement and recommend prophylaxis. If in doubt, please discuss with Dr Nijjer before your appointment.
Before Your Appointment
Questions to Ask Your Dentist & Cardiologist
Being well prepared helps both you and your clinical team. These are the questions most worth raising before any invasive dental procedure.
Before dental treatment
Questions to Ask Your Dentist
- 1 I take [name your medication] — do you have my up-to-date medical history, and have you factored this into your treatment plan?
- 2 Do I need to stop or adjust any of my heart medications before this procedure? (If yes — how does this fit with current SDCEP guidance, and have you consulted my cardiologist?)
- 3 What local measures will you use to control bleeding during and after the procedure, given that I am on blood thinners?
- 4 What are the signs of excessive post-operative bleeding I should watch for at home, and at what point should I seek urgent help?
- 5 Is this the best time to carry out this procedure, or would it be safer to stage it over multiple shorter appointments?
- 6 I have a mechanical heart valve / recent stent / a history of endocarditis — are you aware of this, and does it change your approach?
- 7 Will you send a note to my GP or cardiologist after today's treatment outlining what was done and any medications used?
Before dental treatment
Questions to Ask Dr Nijjer
- 1 I need to have [describe the dental procedure]. Is it safe to continue all of my heart medications beforehand, including aspirin, clopidogrel and/or warfarin?
- 2 How long ago was my stent placed, and am I still within the high-risk period where I absolutely should not stop antiplatelet therapy?
- 3 My dentist has suggested stopping my medication for [X days] before a procedure — do you agree with this, and what is the cardiac risk of doing so?
- 4 I have a mechanical heart valve — what INR level should I be aiming for before dental work, and do I need a more recent INR check than usual?
- 5 I take warfarin / a DOAC — what should I do if my dentist tells me my INR is too high or asks me to reduce my dose?
- 6 Do I need antibiotic cover before any dental procedures given my specific heart condition?
- 7 If I develop a fever or feel unwell in the days after a dental procedure, at what point should I contact you or go to A&E?
Need guidance before
your dental appointment?
Dr Nijjer's team can provide a written summary of your cardiac medications and advice for your dentist, or answer specific questions before you proceed. Please contact the practice with any concerns.
This page provides general educational information based on published clinical guidance and is not a substitute for individual medical advice. Drug management decisions should always be made in consultation with your cardiologist, GP and dentist, taking into account your specific medical history. Sources: SDCEP Management of Dental Patients Taking Anticoagulants or Antiplatelet Drugs, 2nd Edition (March 2022); NICE Clinical Guideline CG64 — Prophylaxis Against Infective Endocarditis (updated 2016).