Antibiotics for a Tooth Infection: How to Get Them, What They Cost, and Why They're Not Enough (2026)
Throbbing tooth, swollen gum, maybe a bump that won't go away. The instinct is "I need an antibiotic." Often you need a dentist more. Here's what the American Dental Association's guideline actually says, the fastest and cheapest ways to get seen (including if you're uninsured), what the antibiotics cost when they are needed, and the warning signs that mean the ER.
- Updated Sep 30, 2026
- Drug prices checked Aug 17, 2026
- 9 cited sources
- No paid placements
On this page 10 sections
Quick answer
Antibiotics don't fix a tooth infection. Dental treatment does. The American Dental Association's guideline advises against antibiotics for most toothaches and localized infections, and calls for a root canal, drainage or extraction instead. Antibiotics are for infections spreading beyond the tooth, such as fever or malaise, or as a bridge when treatment isn't possible right away.
When they are prescribed, they're cheap. The ADA's recommended choices, amoxicillin or penicillin V, cost about $6–$29 with a free discount card. The expensive part is the visit: $90–$200 at a dentist, from $65 for an online dentist, and an average of $749 in the ER.
There's no over-the-counter or "natural" antibiotic for a tooth abscess. Go to the ER for facial swelling, fever, or trouble breathing or swallowing.
Why antibiotics alone don't fix a tooth infection
A tooth infection lives inside the tooth or at the tip of its root, where antibiotics can't clear the source. The fix is mechanical: remove or drain the infected tissue.
What antibiotics can do
A bridge, not a cure
- Calm an infection spreading beyond the tooth (fever, malaise)
- Buy time when you can't get treatment right away
Once they're finished, the infected tissue is still in the tooth.
What actually fixes it
Definitive dental treatment
- Root canal (cleans out the infected nerve and keeps the tooth)
- Incision and drainage of the abscess
- Extraction when the tooth can't be saved
Sources: American Dental Association 2019 guideline, MedlinePlus (NIH) "Tooth abscess."
When dentists use antibiotics, and when they don't
The ADA's 2019 guideline, summarized by the CDC, advises against antibiotics for three of the four common situations when a dentist can treat you right away.
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| Situation | Dentist can treat now: antibiotic? | Treatment must wait: antibiotic? | What happens instead |
|---|---|---|---|
| Inflamed nervesymptomatic irreversible pulpitis | No | No | Dental treatment. Until then, monitoring and OTC pain relief |
| Dead nerve, tender to bitepulp necrosis + symptomatic apical periodontitis | No | Usually no* | Dental treatment. *A delayed prescription if treatment isn't feasible |
| Localized abscessno fever or feeling unwell | No | Yes | Drainage or root canal, with urgent referral |
| Abscess with systemic signsfever, malaise | Yes | Yes | Antibiotics plus urgent dental treatment |
Adapted from the CDC's "Dentists: Be Antibiotics Aware" summary of the ADA guideline (Lockhart et al., JADA 2019), for immunocompetent adults. Plain-English labels are ours. Your dentist makes the call, and people with other health conditions may be managed differently.
Where to get help for a tooth infection fast
The best route is the one that can fix the tooth, not just prescribe. Online dentists are the cheapest fast option for an evaluation and prescription.
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| Route | Typical cash cost | Can prescribe | Can fix the tooth | Best for |
|---|---|---|---|---|
| Dentistsame-day or emergency slot | $90–$200visit, per ADA | Yes | Yes | Almost everyone. Ask for an emergency or same-day appointment. |
| Community health center / dental school | Sliding scaleor reduced fees | Yes | Yes | No insurance or tight budget. How to find one |
| Online dentistteledentistry, e.g. Sesame | from $65video consult | Yes | No | Night or weekend pain. Get evaluated, get a plan, and a prescription if appropriate. |
| Urgent care | $150–$250visit | Yes | No | When you can't reach a dentist. Expect a referral. |
| Emergency room | $749 avg$400–$1,500, per ADA | Yes | No | Facial swelling, fever, or trouble breathing or swallowing. Warning signs |
Dentist and ER costs from the American Dental Association. Online dentist: Sesame pricing page, Sep 2026 (prices set by each dentist). Urgent care: 2026 cash-price guides. Costs vary by location and exclude the procedure itself.
Why the ER is the worst deal for a toothache
Unless you have emergency warning signs, the ER costs the most and fixes the least. It usually has no dentist on staff.
Americans make an estimated 2 million ER visits a year for dental pain, averaging $749 each when they aren't admitted, versus $90–$200 at a dentist. The typical ER outcome is a prescription for painkillers and antibiotics, with the tooth still untreated.American Dental Association, Action for Dental Health: emergency department referrals
Visit cost for a toothache, by route
Cash price of the visit only. Procedures and prescriptions are extra.
No insurance? Where to find low-cost dental care
Federally funded clinics and dental schools treat the tooth at reduced cost, which is what actually ends the infection.
How to find: findahealthcenter.hrsa.gov. About three-quarters of HRSA-supported centers provide dental care, according to NIDCR.
Note: call ahead for urgent dental slots.
How to find: the ADA's accredited program list at coda.ada.org.
Note: appointments can take longer. Ask about emergency clinics.
What tooth-infection antibiotics cost
The ADA's recommended choices are low-cost generics, from $6.22 (amoxicillin) and $11.64 (penicillin V). Tap a column header to sort.
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| Antibiotic | Lowest price | Highest price | Package priced | ADA guideline |
|---|---|---|---|---|
| AmoxicillinAmoxil | $6.22 | $15.73 | 500 mg × 21 caps | Recommended |
| Penicillin V potassium | $11.64 | $29.19 | 500 mg × 28 tabs | Recommended |
| MetronidazoleFlagyl | $6.01 | $17.55 | 500 mg × 14 tabs | Other option dentists may use |
| AzithromycinZ-Pak | $8.93 | $25.05 | 6 tabs | Other option dentists may use |
| CephalexinKeflex | $11.46 | $25.92 | 500 mg × 28 caps | Other option dentists may use |
| ClindamycinCleocin | $11.83 | $33.70 | 300 mg × 30 caps | Other option dentists may use |
| Amoxicillin-clavulanateAugmentin | $13.84 | $27.78 | 875/125 mg × 20 tabs | Other option dentists may use |
Discount-card prices across 9 US pharmacy chains, RxHelp US pharmacy price panel, Aug 17, 2026. Packages are standard quantities priced, not doses. The ADA guideline's recommendation is amoxicillin or penicillin V when antibiotics are indicated. For penicillin allergy, the guideline gives separate options. Your dentist chooses.
Is there a "natural antibiotic" for a tooth infection?
It's one of the most-searched tooth questions. The honest answer: no home remedy can remove an infection from inside a tooth.
What can help while you wait
- Warm salt-water rinses to ease pain (MedlinePlus)
- OTC acetaminophen or ibuprofen, as the ADA guideline advises for pain
- Booking the first available dental slot
What can't cure it
- Clove oil, garlic, oil pulling or other home remedies
- Leftover antibiotics from a past illness (wrong drug or amount)
- Pet or "fish" antibiotics
- Waiting, which risks spread to the jaw, face or blood (MedlinePlus)
What you can buy over the counter for tooth pain
No antibiotic for a tooth infection is sold over the counter. Pain relief is what the aisle offers, with one important safety warning.
| OTC product | What it does | Treats the infection? |
|---|---|---|
| Pain relieversacetaminophen, ibuprofen | The pain relief the ADA guideline points to while you wait for dental treatment. Follow the label. | No |
| Numbing gelsbenzocaine: Orajel, Anbesol and others | Temporary numbing. The FDA says oral benzocaine products shouldn't be used in children under 2, because of a rare but serious blood disorder (methemoglobinemia). | No |
Warning signs: when a tooth infection is an emergency
Go to the ER or call 911 for
- Swelling of the face, especially if it's spreading
- Fever with tooth pain or swelling
- Difficulty breathing or swallowing
MedlinePlus lists these as signs to seek immediate care. An untreated abscess can spread to the jaw bone, soft tissue and bloodstream.
The fastest path to actually fixing it
- Today
Check for red flags
Facial swelling, fever or trouble breathing mean the ER, now.
- Today
Call for a same-day slot
Dentist, health center or dental school. Online dentist if it's after hours.
- At the visit
Exam & X-ray
The dentist decides on a root canal, drainage or extraction, and whether an antibiotic is needed.
- Follow-up
Finish the treatment
A root canal can take more than one visit. Keep the follow-up.
Frequently asked questions
What antibiotic is used for a tooth infection?
When antibiotics are needed, the American Dental Association's 2019 guideline recommends amoxicillin or penicillin V potassium. For people allergic to penicillin, the guideline lists other options. Your dentist chooses based on your history. See best antibiotics for a tooth infection.
Do I need antibiotics for a tooth infection?
Often not. The ADA guideline advises against antibiotics for most toothaches, including an inflamed or dead nerve, and for a localized abscess when dental treatment is available. It recommends dental treatment plus over-the-counter pain relievers. Antibiotics are recommended when infection spreads (fever, malaise) or when treatment can't happen right away.
Can I get antibiotics for a tooth infection without seeing a dentist?
An online dentist can evaluate you by video and prescribe if appropriate. On Sesame, video dental consults start at $65. Urgent care and general telehealth clinicians can also prescribe in some cases. But none of them can fix the tooth, so you'll still need a dentist for the root canal, drainage or extraction.
Can you get antibiotics for a tooth infection over the counter?
No. All antibiotics for tooth infections are prescription-only in the US. Over-the-counter options are pain relievers (acetaminophen, ibuprofen) and numbing gels. The FDA says oral benzocaine products shouldn't be used in children under 2.
What is the strongest natural antibiotic for a tooth infection?
There isn't one that can cure it. A tooth abscess is an infection inside the tooth or its root, and it needs a dentist to remove the source: drainage, a root canal or an extraction. Warm salt-water rinses may ease pain, according to MedlinePlus, but they don't treat the infection. Delaying care risks the infection spreading.
How much do antibiotics for a tooth infection cost without insurance?
With a free discount card in our August 2026 data: amoxicillin 500 mg × 21 cost $6.22–$15.73 and penicillin V 500 mg × 28 cost $11.64–$29.19. The dentist visit ($90–$200 per the ADA) and the treatment itself cost far more than the antibiotic.
Should I go to the ER for a tooth infection?
Go to the ER for facial swelling, fever, or difficulty breathing or swallowing. These can mean a spreading infection. For a toothache without those signs, a dentist is faster to fix it and far cheaper. The ADA says ER dental visits average $749 and usually end with a prescription for pain relief and antibiotics, not treatment of the tooth.
How can I get dental care without insurance?
Try a federally funded community health center, which charges on a sliding scale by income (find one at findahealthcenter.hrsa.gov), or a dental school clinic, where students treat patients under supervision at reduced cost. Online dental consults start around $65 for an evaluation.
Will antibiotics make a tooth infection go away?
They can calm a spreading infection, but the source stays inside the tooth. That's why the ADA calls for dental treatment. Without it, the problem is likely to come back.
Related guides
Sources
- American Dental Association — Antibiotics for dental pain and swelling (2019 guideline)
- CDC — Dentists: Be Antibiotics Aware, treating patients with dental pain and swelling
- American Dental Association — Emergency department referrals (ED visit costs)
- MedlinePlus (NIH) — Tooth abscess
- NIDCR (NIH) — Finding low-cost dental care
- HRSA — Find a health center
- ADA Commission on Dental Accreditation — Find a dental school program
- Sesame — Online dental consult (from $65)
- FDA — Action on oral OTC benzocaine products (2018)
How we researched this
Treatment guidance comes from the American Dental Association's 2019 clinical practice guideline (JADA) and the CDC's "Be Antibiotics Aware" summary of it; emergency and dentist visit costs from the ADA; warning signs and home care from MedlinePlus (NIH). Drug prices are discount-card prices from our US pharmacy price panel (9 chains, Aug 17, 2026). We don't take payment from any provider or pharmacy. Methodology · Editorial policy
Last updated September 30, 2026. General education, not medical advice — a licensed clinician or pharmacist decides whether you need an antibiotic and which one.