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Which is better for tooth infection amoxicillin or cephalexin?

Author

Rachel Ellis

Published Jan 14, 2026

While penicillin, amoxicillin, amoxicillin and clavulanate potassium (Augmentin), and clindamycin are the first-line antibiotic treatments for most dental infections, cephalexin may be considered when you have an allergy to those medications. Cephalexin can be effective for treating dental abscesses and gum infections.

Is cephalexin stronger than amoxicillin?

Is cephalexin or amoxicillin stronger? When dosed appropriately, both antibiotics are effective against their covered organisms. The organism coverage of cephalexin makes it effective in some conditions that amoxicillin is not, including mastitis and bone and joint infections.

What is the strongest antibiotic for a tooth infection?

Amoxicillin is usually the first choice for tooth infection treatment. If your tooth infection is more serious, your dentist may prescribe a combination of amoxicillin and another drug called Clavulanate. This combination is stronger and more effective against tooth infections.

Is cephalexin good for a toothache?

Official Answer. Yes, Cephalexin can be used to treat tooth abscess and gum infections. Cephalexin is in a group of drugs called cephalosporins antibiotics and is used to fight bacteria infections in the body.

How long does it take for cephalexin to work on tooth infection?

Oral cephalexin: Three to seven days6.

16 related questions found

Can I take cephalexin and amoxicillin at the same time?

No interactions were found between amoxicillin and cephalexin.

How long will antibiotics keep tooth infection away?

Usually, within 2-3 days, you'll start feeling better and see an improvement in the infection. On average, a full course of antibiotics takes 7 to 14 days to complete depending on the type used.

Which antibiotic is best for teeth pain?

Antibiotics of the penicillin class, such as penicillin and amoxicillin, are most commonly used to help treat tooth infections. An antibiotic called metronidazole may be given for some types of bacterial infections.

Will an antibiotic help tooth pain?

Antibiotics are not painkillers – even though pain associated with a serious infection can often subside after a round of antibiotics, it's a slower way to relieve pain. If you are administered antibiotics, follow the advice of your dentist regarding the type, duration and frequency of your treatment.

Will antibiotics stop tooth infection pain?

Amoxicillin is one of the first antibiotics recommended for the treatment of a tooth infection. It has shown to be widely effective and have fewer gastrointestinal side effects compared to other options. Antibiotics do not relieve pain directly, but pain may be reduced as the infection is knocked out by the antibiotic.

What infections does cephalexin treat?

Cefalexin is an antibiotic. It belongs to a group of antibiotics called cephalosporins. It's used to treat bacterial infections, such as pneumonia and other chest infections, skin infections and urinary tract infections (UTIs). Cefalexin is only available on prescription.

Is 5 days of amoxicillin enough for tooth infection?

Although it is not very clear, according to the literature in most cases, 2-3 days of medication is adequate. However, when the treatment is not done properly, the antibiotic coverage may be needed for up to 7 days. According to the International Dental Journal study notes, most acute infections resolve in 3-7 days.

What if amoxicillin doesn't work for tooth infection?

If the antibiotic medication doesn't resolve the infection, a dentist may recommend another procedure to remove the infected tissue, such as a root canal or a tooth extraction.

How much cephalexin should I take for tooth infection?

The usual dose of oral KEFLEX is 250 mg every 6 hours, but a dose of 500 mg every 12 hours may be administered. Treatment is administered for 7 to 14 days. For more severe infections larger doses of oral KEFLEX may be needed, up to 4 grams daily in two to four equally divided doses.

How long does cephalexin 500mg TAKE TO WORK?

Cephalexin starts to work right away and becomes the most effective one hour after taking it. That being said, it can take up to 48 hours after taking the drug to start seeing your symptoms improve.

Is cephalexin a strong antibiotic?

Cephalexin is called a broad-spectrum antibiotic because it is effective against a wide range of bacteria. Cephalexin belongs to the class of antibiotics known as cephalosporins. Cephalexin is a first-generation cephalosporin and is mainly effective against gram-positive bacteria.

What helps an infected tooth?

Treatment

  1. Open up (incise) and drain the abscess. The dentist will make a small cut into the abscess, allowing the pus to drain out, and then wash the area with salt water (saline). ...
  2. Perform a root canal. This can help eliminate the infection and save your tooth. ...
  3. Pull the affected tooth. ...
  4. Prescribe antibiotics.

What's good for tooth infection?

Make a baking soda paste

Baking soda is a quick and effective way to ease an infected tooth. Mix 1/2 tablespoon of baking soda with 1/2 cup of water and a bit of table salt. Swish in your mouth for a few minutes and again until the mixture is gone.

Why won't my tooth infection go away?

Complications. A tooth abscess won't go away without treatment. If the abscess ruptures, the pain may decrease significantly — but you still need dental treatment. If the abscess doesn't drain, the infection may spread to your jaw and to other areas of your head and neck.

Will the dentist pull an infected tooth?

Will a dentist pull an infected tooth? Yes, dentists routinely do pull infected teeth. They do this all of the time.

Will antibiotics shrink a tooth abscess?

When you are suffering from a tooth infection, you may want an easy solution, such as a course of antibiotics. However, antibiotics won't cure your tooth infection. Oral bacterial infections cause abscesses, which are small pockets of pus and dead tissue in the mouth.

Is there a stronger antibiotic than amoxicillin?

Augmentin would be considered stronger than amoxicillin for treating infections caused by strains of bacteria that produce beta-lactamase.

What is cephalexin most commonly used for?

Cephalexin is used to treat certain infections caused by bacteria such as pneumonia and other respiratory tract infections; and infections of the bone, skin, ears, , genital, and urinary tract.

What is the strongest antibiotic for bacterial infection?

Vancomycin, long considered a "drug of last resort," kills by preventing bacteria from building cell walls. It binds to wall-building protein fragments called peptides, in particular those that end with two copies of the amino acid D-alanine (D-ala).

How long is cephalexin good for?

Store the oral liquid in the refrigerator. Throw away any unused medicine after 14 days.