Prevention, Hygiene & Lifestyle
Adverse effects of antibiotics
Antibiotics treat some infections but can cause side effects and are not always needed.
Treats
Bacterial infection
Cures toothache alone
Usually no
Common effect
Stomach upset
Key risk
Resistance
Overview
Antibiotics fight bacterial infections, but they cannot cure a toothache on their own. Many dental problems need a procedure to remove the cause.
They can cause side effects such as upset stomach or thrush, and overusing them helps bacteria become resistant. Your dentist prescribes them only when truly needed.
What to know
- Antibiotics alone rarely cure a toothache
- Common side effects include stomach upset
- Overuse fuels antibiotic resistance
- Finish the course exactly as prescribed
Common questions
Why will my dentist not just give antibiotics?
Most dental pain comes from a problem inside the tooth that needs treating directly.
What side effects are common?
Upset stomach, diarrhoea and thrush. Tell your dentist about any reaction.
Should I finish the whole course?
Yes, take them exactly as prescribed unless your dentist or doctor says to stop.
Can I drink alcohol with them?
It depends on the antibiotic. Check the label and ask your pharmacist.
Related topics
Toothache
Toothache has many causes and should be checked to treat the source.
Dental abscess & facial swelling
A dental abscess is an infection that needs prompt treatment.
Root canal treatment
Treatment that saves a tooth by removing infected or damaged tissue inside it.
Tooth decay
Damage to the tooth caused by acid from plaque bacteria.
Dr Rick Iskandar · Reviewed June 2026