By the BossCE Editorial Team.
Key Points
- Antibiotic prophylaxis against infective endocarditis (IE) is for high-risk cardiac patients only, and only before invasive dental procedures such as extractions, subgingival scaling and implant placement [1][2].
- The Malaysian CPG lists more conditions as high risk than the European and American guidance, including native valvular heart disease and established rheumatic heart disease [1][2][3].
- The regimen is a single dose 30 to 60 minutes before the procedure: amoxicillin 2 g orally for adults without penicillin allergy [1].
- For penicillin allergy, the Malaysian CPG lists clindamycin 600 mg, but the 2021 American Heart Association statement no longer recommends clindamycin [1][3]. Check which guidance your institution follows.
Why This Question Keeps Coming Up
A patient with a heart murmur, a valve replacement or a history of rheumatic fever needs a tooth out. The dentist writes to the doctor asking whether antibiotic cover is needed. The doctor replies “please give prophylaxis” or “not required”, often without saying why. Both are trying to protect the patient, and both are working from guidance that differs between countries.
IE after dental procedures is uncommon, which is why international guidance has narrowed prophylaxis to the patients who would come to most harm if it did occur [1][2].
Who Is High Risk Under the Malaysian CPG
The Malaysian Clinical Practice Guidelines for the Prevention, Diagnosis and Management of Infective Endocarditis list these cardiac conditions as indications for prophylaxis [1]:
- Prosthetic cardiac valves, or prosthetic material used for valve repair
- Native valvular heart disease, including established rheumatic heart disease
- Previous infective endocarditis
- Unrepaired cyanotic congenital heart disease, including palliative shunts and conduits
- Congenital heart disease completely repaired with prosthetic material or a device, for the first 6 months after the procedure
- Repaired congenital heart disease with a residual defect at or next to a prosthetic patch or device
- Heart transplant recipients who develop valvulopathy
The Malaysian difference: the 2023 European Society of Cardiology guideline limits dental prophylaxis to previous IE, surgically or transcatheter implanted valves or valve repair, uncorrected cyanotic or prosthetic-repaired congenital heart disease, and ventricular assist devices [2]. The Malaysian CPG writing committee’s consensus is to give prophylaxis to all high-risk patients, including those with established rheumatic heart disease [1]. In the United Kingdom, NICE does not recommend routine prophylaxis for dental procedures at all [1].
Which Dental Procedures Need It
| Prophylaxis required | Consider if multiple, prolonged or with periodontal disease | Not required |
|---|---|---|
| Extractions; periodontal surgery, subgingival scaling and root planing; replanting avulsed teeth; implant placement and apicectomy | Full periodontal probing in periodontitis; intraligamentary and intraosseous local anaesthetic; supragingival scaling; clamps or matrix bands that may damage gingiva; endodontics beyond the apex; orthodontic bands; subgingival retraction cords | Oral examination; infiltration and block local anaesthetic; restorative dentistry; intracanal endodontics; suture removal; impressions and dentures; orthodontic brackets and adjustments; intraoral radiographs; supragingival plaque removal |
Adapted from Table 8.2 of the Malaysian CPG [1].
The Regimen
A single dose, 30 to 60 minutes before the procedure [1]:
| Situation | Adults | Children |
|---|---|---|
| No penicillin allergy | Amoxicillin or ampicillin 2 g orally or IV | 50 mg/kg orally or IV |
| Penicillin allergy (Malaysian CPG) | Clindamycin 600 mg orally or IV | 20 mg/kg orally or IV |
| Alternatives listed in the CPG | Cefazolin or ceftriaxone 1 g IV | 50 mg/kg IV |
Cephalosporins should not be used in patients with a history of anaphylaxis, angioedema or urticaria after penicillin or ampicillin [1].
A note on clindamycin: the Malaysian CPG was issued in 2017 [1]. The American Heart Association’s 2021 scientific statement no longer recommends clindamycin for dental prophylaxis because of more frequent and severe adverse reactions, including Clostridioides difficile infection, and lists azithromycin or clarithromycin 500 mg, or doxycycline 100 mg, as oral alternatives for penicillin allergy [3][4]. Discuss with the patient’s cardiologist or follow your institution’s antibiotic policy.
Practical Points for Doctors and Dentists
- Doctors: in referral letters and replies, name the cardiac condition (for example “mechanical mitral valve” or “established rheumatic mitral regurgitation”) rather than only “cardiac patient”. The dentist can then match it to the guideline.
- Dentists: ask about previous endocarditis, valve surgery, rheumatic fever and congenital heart disease at every medical history update. Anticoagulants often come with these conditions; see our guide on anticoagulants and antiplatelets before dental extraction.
- Both: prevention matters as much as prophylaxis. Good oral hygiene and regular dental review are recommended for patients at intermediate or high risk of IE [2].
- Prophylaxis before dental procedures is not needed solely to protect a pacemaker or other cardiac implantable electronic device [2].
Try it now: ask BossCE AI about a patient with rheumatic heart disease who needs an extraction. The Malaysian IE CPG is in the BossCE Library, so the answer quotes it directly.
References
- National Heart Association of Malaysia, Academy of Medicine of Malaysia, Ministry of Health Malaysia. Clinical Practice Guidelines for the Prevention, Diagnosis and Management of Infective Endocarditis. 2017. Section 8, Antimicrobial Prophylaxis for Infective Endocarditis.
- Delgado V, et al. 2023 ESC Guidelines for the management of endocarditis. Eur Heart J. 2023;44(39):3948–4042. Summary: American College of Cardiology, Key Points.
- Wilson WR, et al. Prevention of Viridans Group Streptococcal Infective Endocarditis: A Scientific Statement From the American Heart Association. Circulation. 2021;143:e963–e978. PubMed 33853363.
- Royal College of Dental Surgeons of Ontario. AHA 2021 Statement on Prevention of Infective Endocarditis. rcdso.org.
This article is for qualified healthcare professionals and is not a substitute for clinical judgement or the full guideline. Check the current version of each source before applying it.