Dentistry · ADA_DENTAL

Acute dental pain and intraoral swelling

ADA_DENTAL

Source:ADA Evidence-Based Clinical Practice Guideline on Antibiotic Use for Urgent Management of Pulpal- and Periapical-Related Dental Pain and Intraoral Swelling (2019)

Verified Apr 2026

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Red Flags

Spreading facial infection with trismus, dysphagia, drooling, dyspnoea, or systemic features (Ludwig's angina, parapharyngeal/retropharyngeal abscess) — admit for IV antibiotic and surgical drainage; airway monitoring^[1]
Immunocompromised patient with dental pain or swelling — lower threshold for antibiotic and same-day OMFS review^[1]
Pregnancy with dental infection — definitive dental treatment and pregnancy-safe antibiotic when systemic involvement present^[1]
Diabetes with poor control and dental abscess — risk of cellulitis and sepsis; coordinate dental and medical management^[1]

First-line treatment

Interventions

Pulpitis or symptomatic apical periodontitis WITHOUT systemic involvement^[1]
DO NOT prescribe antibiotic; provide pulpectomy/pulpotomy or root canal therapy; analgesia (NSAID + paracetamol); definitive dental treatment within 24–48 h
Localised intraoral swelling (periapical abscess) WITHOUT systemic involvement^[1]
DO NOT prescribe antibiotic routinely; perform incision and drainage with definitive dental treatment; analgesia
Systemic involvement (fever ≥38°C, malaise, lymphadenopathy, trismus, lethargy, cellulitis) or immunocompromise^[1]
Add oral antibiotic (amoxicillin first-line) AS ADJUNCT to definitive dental management; review at 24–72 h with stop date 3 days after symptoms resolve
Severe spreading infection with airway risk^[1]
Admit; IV antibiotic; surgical drainage by oral and maxillofacial surgery; airway support if compromised; consider Ludwig's angina, parapharyngeal/retropharyngeal abscess

First-line drug therapy

Drug	Class	Adult	Paediatric	Notes
Paracetamol + ibuprofen (analgesia)^[1]	Non-opioid analgesia	Paracetamol 1 g PO QDS + ibuprofen 400 mg PO TDS (with food and PPI cover for risk groups)	—	First-line for pulpal pain — superior to opioid for dental pain; do not use opioid first-line for acute dental pain
Amoxicillin (when antibiotic indicated)^[1]	Aminopenicillin	500 mg PO TDS × 3–7 days (stop 3 days after symptom resolution)	25 mg/kg/dose TDS	First-line oral antibiotic when systemic involvement; review at 48–72 h; review with definitive dental treatment
Phenoxymethylpenicillin (penicillin V — alternative)^[1]	Beta-lactam antibiotic	500 mg PO QDS × 3–7 days	12.5 mg/kg/dose QDS	Narrow-spectrum alternative; equivalent efficacy to amoxicillin in odontogenic infections; widely available
Metronidazole (combination for severe / anaerobic)^[1]	Nitroimidazole	400 mg PO TDS × 5 days	7.5 mg/kg/dose TDS	Combine with amoxicillin for severe odontogenic infections (anaerobic cover); avoid alcohol (disulfiram-like reaction)
Clarithromycin or azithromycin (penicillin allergy)^[1]	Macrolide	Clarithromycin 500 mg PO BD × 5 days; azithromycin 500 mg PO daily × 3 days	Clarithromycin 7.5 mg/kg BD; azithromycin 10 mg/kg daily	Penicillin allergy alternative; QTc caution with concurrent QT-prolonging agents
Co-amoxiclav (severe / failure of first-line)^[1]	Aminopenicillin + beta-lactamase inhibitor	625 mg PO TDS × 5–7 days	30 mg/kg/dose TDS amoxicillin component	Severe odontogenic infection with cellulitis or failure of amoxicillin; broader gram-negative and anaerobic cover

Paracetamol + ibuprofen (analgesia)^[1]

Non-opioid analgesia

Adult: Paracetamol 1 g PO QDS + ibuprofen 400 mg PO TDS (with food and PPI cover for risk groups)
Paediatric: —

First-line for pulpal pain — superior to opioid for dental pain; do not use opioid first-line for acute dental pain

Amoxicillin (when antibiotic indicated)^[1]

Aminopenicillin

Adult: 500 mg PO TDS × 3–7 days (stop 3 days after symptom resolution)
Paediatric: 25 mg/kg/dose TDS

First-line oral antibiotic when systemic involvement; review at 48–72 h; review with definitive dental treatment

Phenoxymethylpenicillin (penicillin V — alternative)^[1]

Beta-lactam antibiotic

Adult: 500 mg PO QDS × 3–7 days
Paediatric: 12.5 mg/kg/dose QDS

Narrow-spectrum alternative; equivalent efficacy to amoxicillin in odontogenic infections; widely available

Metronidazole (combination for severe / anaerobic)^[1]

Nitroimidazole

Adult: 400 mg PO TDS × 5 days
Paediatric: 7.5 mg/kg/dose TDS

Combine with amoxicillin for severe odontogenic infections (anaerobic cover); avoid alcohol (disulfiram-like reaction)

Clarithromycin or azithromycin (penicillin allergy)^[1]

Macrolide

Adult: Clarithromycin 500 mg PO BD × 5 days; azithromycin 500 mg PO daily × 3 days
Paediatric: Clarithromycin 7.5 mg/kg BD; azithromycin 10 mg/kg daily

Penicillin allergy alternative; QTc caution with concurrent QT-prolonging agents

Co-amoxiclav (severe / failure of first-line)^[1]

Aminopenicillin + beta-lactamase inhibitor

Adult: 625 mg PO TDS × 5–7 days
Paediatric: 30 mg/kg/dose TDS amoxicillin component

Severe odontogenic infection with cellulitis or failure of amoxicillin; broader gram-negative and anaerobic cover

Safety-net

Antibiotic alone does not cure dental infection — definitive dental treatment (root canal or extraction) within 24–48 h is essential; antibiotics are adjunct only when systemic involvement^[1]
Spreading facial swelling, trismus, dysphagia, drooling, breathlessness, fever, or feeling unwell — same-day OMFS / emergency department review^[1]
Take analgesia regularly (paracetamol + NSAID) for pain control rather than as needed; superior pain relief than opioid for dental pain^[1]

Referral criteria

Severe spreading infection (Ludwig's angina, parapharyngeal abscess), airway risk, systemic sepsisEmergency department; oral and maxillofacial surgery^[1]
Failure to improve at 24–48 h on oral antibiotic with definitive dental treatmentOMFS for incision and drainage, IV antibiotic, imaging^[1]
Immunocompromised, diabetic with poor control, pregnant patient with significant infectionOMFS and relevant medical team^[1]
No access to dental practitioner for definitive treatmentEmergency dental services / hospital dental clinic^[1]

Clinical summary

Antibiotic stewardship and definitive dental management for adults with pulpal- and periapical-related dental pain and localised intraoral swelling.

References

1.ADA Evidence-Based Clinical Practice Guideline on Antibiotic Use for Urgent Management of Pulpal- and Periapical-Related Dental Pain and Intraoral Swelling (2019) (2019)

Drug

Class

Adult

Paediatric

Notes

Paracetamol + ibuprofen (analgesia)^[1]

Non-opioid analgesia

Paracetamol 1 g PO QDS + ibuprofen 400 mg PO TDS (with food and PPI cover for risk groups)

—

First-line for pulpal pain — superior to opioid for dental pain; do not use opioid first-line for acute dental pain

Amoxicillin (when antibiotic indicated)^[1]

Aminopenicillin

500 mg PO TDS × 3–7 days (stop 3 days after symptom resolution)

25 mg/kg/dose TDS

First-line oral antibiotic when systemic involvement; review at 48–72 h; review with definitive dental treatment

Phenoxymethylpenicillin (penicillin V — alternative)^[1]

Beta-lactam antibiotic

500 mg PO QDS × 3–7 days

12.5 mg/kg/dose QDS

Narrow-spectrum alternative; equivalent efficacy to amoxicillin in odontogenic infections; widely available

Metronidazole (combination for severe / anaerobic)^[1]

Nitroimidazole

400 mg PO TDS × 5 days

7.5 mg/kg/dose TDS

Combine with amoxicillin for severe odontogenic infections (anaerobic cover); avoid alcohol (disulfiram-like reaction)

Clarithromycin or azithromycin (penicillin allergy)^[1]

Macrolide

Clarithromycin 500 mg PO BD × 5 days; azithromycin 500 mg PO daily × 3 days

Clarithromycin 7.5 mg/kg BD; azithromycin 10 mg/kg daily

Penicillin allergy alternative; QTc caution with concurrent QT-prolonging agents

Co-amoxiclav (severe / failure of first-line)^[1]

Aminopenicillin + beta-lactamase inhibitor

625 mg PO TDS × 5–7 days

30 mg/kg/dose TDS amoxicillin component

Severe odontogenic infection with cellulitis or failure of amoxicillin; broader gram-negative and anaerobic cover