Can you combine different antibiotics for a dental infection?

Yes, dentists sometimes combine specific antibiotics, such as Amoxicillin with Metronidazole. This combination creates a synergistic effect, meaning the two medications work together to produce a significantly stronger therapeutic response than either drug could achieve on its own.

What antibiotics are prescribed for a tooth infection if you are allergic to penicillin?

If you have a known penicillin allergy, your dentist will typically select an effective alternative option such as Erythromycin or Clindamycin to treat the dental infection safely.

What Are the Best Antibiotics for an Infected Tooth or Abscess?

What Are the Best Antibiotics for a Tooth Infection or Abscess?

Antibiotics for a tooth infection is a major source of questions in my office. 'Can I get antibiotics online' is a common question! This important - as well as being painful, an untreated abscessed tooth can sometimes progress into a serious medical emergency. Infection from an abscessed tooth can spread into your neck, causing difficulty swallowing and breathing. Time for the ER.

A black and white image of a woman with her eyes closed, holding her right cheek with her right hand.

tooth infection

But don't panic just yet! If you're reading this, the chances are that you've just got a sore tooth at this point, and want to find out what the cause is, and what you can do about it. Can you get antibiotics online without seeing a doctor or dentist?

Where to Get Urgent Help Online

If you are dealing with a severe tooth ache or suspected infection and cannot reach your regular dentist immediately, virtual medical services and emergency triage networks can help you access fast pain relief, medical advice, or temporary antibiotic prescriptions.

🇺🇸 United States

The TeleDentists: A 24/7 virtual teledentistry platform connecting patients with licensed dentists via video call within 10 minutes. Dentists can assess your symptoms, provide treatment recommendations, and send emergency prescriptions to your local pharmacy.

🇨🇦 Canada

Virtual Medical Consultations & Prescriptions

Maple: Connects you with licensed Canadian doctors or nurse practitioners via text, audio, or video for fast virtual assessments and digital prescriptions.
Tia Health: Book virtual appointments with Canadian physicians. Consultations are covered by provincial health plans in BC, AB, and ON with a valid health card.Get Health Tips
QDoc: A free 24/7 virtual healthcare service funded by provincial healthcare for patients physically located in Manitoba, British Columbia, Nunavut, and NW Ontario.
Felix Health: An end-to-end digital healthcare platform providing asynchronous online assessments with Canadian practitioners for targeted prescription treatments.

Local Emergency Triage & Financial Aid

Ottawa Dental Society Emergency Service: For those located in Ottawa, ON, call 613-523-4185 for immediate routing to on-call emergency dental care.
Urgent Care Ontario: Connects Ontario residents to local urgent care resources and virtual assessment options.
Canadian Dental Care Plan (CDCP): A government program helping lower the cost of essential oral health care for eligible Canadian residents.

🇬🇧 United Kingdom

Emergency Online Prescriptions

The Online Clinic: Offers rapid online medical consultations with UK-registered GPs who can issue emergency antibiotic prescriptions (such as Amoxicillin or Metronidazole) for next-day delivery or same-day local pharmacy collection.Save on Rx

24/7 Treatment Clinics & Booking Portals

The 247 Dentist: A nationwide network providing out-of-hours, weekend, and bank holiday emergency appointments alongside remote video consultations.
Emerdency: A simple, transparent online booking platform displaying live appointment availability at CQC-regulated emergency dental practices across the UK with clear, fixed fees.
Night and Day Emergency Dentist: Based at 726 Anlaby Road in Hull, providing round-the-clock emergency diagnostics, X-rays, and immediate pain-relief treatments 365 days a year.

🇮🇪 Ireland

Webdoctor.ie: An online doctor platform allowing Irish residents to secure rapid, secure medical consultations and electronic prescription renewals from Irish-registered physicians.

🇦🇺 Australia

SwiftDoc: A virtual GP and telehealth clinic providing video consultations with Australian-registered doctors who can assist with emergency triage, medical advice, and digital scripts sent straight to your phone.

⚠️ Important Clinical Reminder for Patients

Antibiotics are a temporary, stabilizing measure designed to stop an active dental infection from spreading. They cannot permanently cure a tooth abscess because they cannot reach the dead tissue inside the root canal. To fix the issue completely and prevent the pain from returning, you must still follow up with an in-person dentist to receive definitive treatment, such as a root canal or extraction.

Antibiotics for a Tooth Infection

As we've seen, the main symptoms of any abscessed tooth are pain and swelling. You can read more about this at Tooth Abscess Symptoms.

Nearly always, when treating an abscess caused by a dead tooth, antibiotics will be needed. But antibiotics are not the whole solution. If you rely on antibiotics and nothing else, the infection will come back.

To find out what else is involved, take a look at Tooth Abscess Treatment.

A woman with her eyes closed and a swollen face on her left side.

facial swelling

ANY tooth can die and get infected, or get a gum infection next to it.

RARELY, this can spread and lead to a Jaw Bone Infection. This can also happen after a tooth is extracted. To read more about this, go to Jaw Bone Infection.

But there are two other types of tooth infection that only happen to specific teeth;

1. Wisdom teeth infection. This is a gum infection around a wisdom tooth that is coming through. The wisdom tooth itself is healthy, but as it grows through the gum, the gum can get pretty sore.

This is normal. At this stage there's no infection, you're just "teething". But what if the wisdom tooth is coming through at an angle, and gets jammed against the next tooth?

Dentists call it "impacted". Check out the wisdom teeth link above for more.

Also, you can get an infection in the gum over a wisdom tooth that is growing in straight. You can find out more about this at Pericoronitis.

2. If you get a tooth taken out, you can get a tooth extraction infection, or a dry socket.

What a drag! You get a tooth pulled because it's causing a problem, and you still end up with pain! How can this happen? Find out more by visiting my page about tooth extraction infection.

Antibiotics for a Tooth Infection

Where do these infections come from? There are several possibilities.

Your mouth is full of bacteria. Mostly, the good guys live in balance with the bad guys. But sometimes the "bad guys" get the upper hand.

This happens when the bugs find somewhere to hide, where your immune system can't reach them (inside a dead tooth), or under a flap of gum where saliva, mouthwashes and brushes can't go. If your immune system can't get to the bacteria, then they have a chance to breed and set up an infection.

Normally, the symptoms of a tooth infection include discomfort or even pain, a swollen gum, and if you look carefully, you'll probably see that the gum is red.

Most tooth infections or gum infections hurt. But ONE type doesn't. Which is bad, because you don't know anything is wrong!

This is gum disease (periodontal disease).

This is probably the least painful of all the tooth infections, but it is also the most destructive because it frequently goes untreated. This can result in many teeth getting loose, and having to be pulled.

It's caused by plaque collecting at the necks of the teeth, next to the gum edge, and also in between the teeth. If this is not brushed and flossed off every day, the bacteria in the plaque start to attack the gums.

But as we said, it's painless. So you don't know anything's wrong. You just carry on brushing your teeth the same old way! Find out more at Causes of gum disease.

So, a tooth infection can lead to a tooth abscess. Once this happens, the abscessed tooth can get worse. If you don't get it treated, it may become a medical emergency. But 99% of tooth infections never get that far. They are painful enough to force you to get treatment sooner rather than later!

What are the best antibiotics for a tooth infection?

Antibiotics for a tooth infection include the following;

Penicillin V
Amoxicillin
Clamoxyl
Erythromycin
Clindamycin
Metronidazole (Flagyl)

The most commonly prescribed first-line antibiotics for a dental infection are Amoxicillin and Penicillin V due to their effectiveness against oral bacteria. For more complex or spreading infections, your dentist may prescribe Metronidazole either as an alternative or in combination with a penicillin

Do I always need antibiotics for an infected tooth?

Systemic antibiotics are not always necessary if a dentist can successfully drain the localized pocket of infection through the root canal or a small incision in the gum. Eliminating the physical source of the bacteria resolves the pressure and pain without driving antibiotic resistance.

What are the main causes of a tooth infection?

A tooth infection is primarily caused by deep tooth decay, advanced gum disease, or dental fractures that allow harmful oral bacteria to invade the sensitive inner nerve chamber. Once bacteria collect and build up at the base of the root, they form a painful, localized pocket of pus known as an abscess.

How can a tooth infection lead to a dental abscess?

If a bacterial infection inside a tooth is left untreated, it steadily migrates through the root tip and attacks the surrounding jawbone. The body responds by trapping the infection, creating a painful, visible swelling on the gumline called a dental abscess.