He Had Been Taking Antibiotics Before Every Cleaning for Twenty Years

Quick answer: The list of people who need antibiotics before dental treatment has narrowed dramatically over the last two decades. Most heart murmurs, most stents, and almost all joint replacements no longer require it — and taking antibiotics unnecessarily is not a neutral act.

The call

He arrived with a strip of tablets in his pocket, as he had for two decades, and asked which one he should take.

Reuven, 63, from Nofei Aviv, had a mitral valve murmur diagnosed in his thirties. He had been told then to take antibiotics before every dental appointment, including cleanings, and had done so faithfully ever since. He also had a hip replacement from 2016 and had been taking cover for that too.

Nobody had revisited either instruction.

What we found

The guidance changed, substantially, from around 2007 to 2008 onwards, and the reasoning is worth understanding.

The rationale for prophylaxis had been that dental procedures cause bacteria to enter the bloodstream, which could settle on a damaged heart valve and cause infective endocarditis. That is true as far as it goes.

What changed the guidance were three observations. Bacteraemia occurs constantly from ordinary daily activities — chewing, brushing, flossing — and the cumulative exposure from those vastly exceeds the occasional dental appointment. There was no good evidence that prophylaxis actually prevented endocarditis. And antibiotics carry their own risks: allergic reactions, including rare fatal anaphylaxis, and the wider harm of resistance.

The result is that recommendations were narrowed to the small group at genuinely high risk of a severe outcome.

Who is generally still covered, in most current guidance:

• Prosthetic heart valves, including transcatheter valves, and repairs using prosthetic material.
• Previous infective endocarditis.
• Certain specific congenital heart conditions — unrepaired cyanotic disease, repairs with prosthetic material within the first six months, and repairs with residual defects.
• Cardiac transplant recipients who develop valve problems.

Who is generally no longer covered:

• Ordinary heart murmurs, including mitral valve prolapse.
• Coronary stents.
• Bypass grafts.
• Pacemakers and implanted defibrillators.
• Rheumatic heart disease in most guidance, though this varies by country and is worth checking locally.
• Joint replacements. Multiple orthopaedic and dental bodies have moved away from routine cover for prosthetic joints. Some orthopaedic surgeons still request it individually, and that request should be respected rather than argued with in the chair — but it is no longer a general rule.

Guidance also varies between countries, which matters in a town with a large immigrant population. Patients arrive with instructions from the country they came from, and those instructions may reflect a different national guideline rather than being out of date. It is worth checking rather than assuming.

Reuven had a murmur without prosthetic material and a hip replacement from 2016. Under current guidance, neither indicated routine prophylaxis.

What we did

Did not simply stop it. Telling a patient that twenty years of instruction was unnecessary, on the day, in a dental chair, is not how this should be handled — and the original diagnosis needed verifying rather than assuming.

Wrote to his cardiologist, describing the murmur as recorded, asking whether there was any prosthetic material or previous endocarditis, and asking whether prophylaxis remained indicated.

The reply confirmed mitral valve prolapse with mild regurgitation, no prosthetic material, no previous endocarditis, and no current indication for prophylaxis.

Wrote to his orthopaedic surgeon about the hip. The reply agreed that routine cover was not required.

Treated him without antibiotics, with both letters in his notes and copies given to him — because he will be asked this question by other clinicians, and having the answer in writing saves the conversation each time.

Emphasised what does matter, which is the part that gets lost. For anyone at cardiac risk, day-to-day oral health matters far more than prophylaxis before appointments, precisely because the bacteraemia from daily life is the larger exposure. Healthy gums are the actual protection.

The outcome

Four years of routine dental care with no prophylaxis and no problems.

He had taken an estimated eighty unnecessary courses of antibiotics over two decades.

What to do if this happens to you

1. Ask whether you still need cover. Guidance has changed and instructions are rarely revisited.
2. Bring the specific cardiac diagnosis, not just "a murmur".
3. Expect a letter to your specialist rather than a decision made in the chair.
4. Keep the reply in writing. You will be asked repeatedly.
5. Follow an individual surgeon's request if one is made for your joint, even if general guidance differs.
6. Prioritise gum health. For cardiac patients it matters more than prophylaxis does.

Told years ago to take antibiotics before dental visits? Ask Ramat Beit Shemesh Urgent Dental Care to check whether it still applies. 055-985-8845 · WhatsApp https://wa.me/972559858845 · Harav Kook 28/1, Beit Shemesh

This is a composite clinical story. It reflects a presentation we see regularly in Beit Shemesh and Ramat Beit Shemesh; the name and details are illustrative and are not those of a real patient.