Amoxicillin – Trusted UK antibiotic for common bacterial infections.
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What is Amoxicillin?
Amoxicillin is a penicillin-type antibiotic used to treat a variety of bacterial infections. It’s one of the most commonly prescribed antibiotics in the UK, suitable for chest infections, dental infections, and UTIs. It works by preventing the growth of bacteria.
Book an online consultation if you’re experiencing symptoms that may require antibiotic treatment.
What is Amoxicillin used for?
- Chest infections (e.g., bronchitis, pneumonia)
- Dental infections
- Ear infections
- Urinary tract infections (UTIs)
How does Amoxicillin work?
A penicillin-type antibiotic that stops bacteria from growing by inhibiting cell wall synthesis.
Dosage and Administration
Adults
500 mg every 8 hours for 5–7 days (varies by infection).
Children
Dose based on weight—your GP will advise.
Important Notes
- Always follow your GP's instructions.
- Finish the full course even if you feel better.
Side Effects
Common Side Effects
- Nausea
- Diarrhoea
- Skin rash
Serious Side Effects
Seek immediate medical attention if you experience:
- Signs of allergy (wheezing, swelling, hives)
- Severe diarrhoea with blood/mucus
Important Warnings
- Do not take if you have a known penicillin allergy.
- Tell your GP if you have kidney disease.
- Check suitability in pregnancy/breastfeeding with your clinician.
Drug Interactions
Tell your GP if you're taking any of the following medications:
- Anticoagulants (e.g., warfarin) – monitoring may be needed.
- Methotrexate – increased toxicity risk.
- Allopurinol – higher risk of skin reactions.
Frequently Asked Questions
Can I get Amoxicillin without a prescription in the UK?
No. A UK-registered prescriber must assess you and issue a prescription if appropriate.
Should I take it with food?
Can be taken with or without food; take with food if it upsets your stomach.
How soon will I feel better?
Many people feel improvement within 48–72 hours; complete the full course.
Medically Reviewed by: Mohammed Hassan, Independent Prescriber
Last Updated: 2025-08-09