Amoxicillin

Amoxicillin is a penicillin-type antibiotic used to treat certain bacterial infections, such as some chest, ear, sinus, urinary, or skin infections, when your prescriber judges it appropriate.

Antibiotics do not treat viral infections like the common cold or flu.

Amoxicillin interferes with bacterial cell walls, helping the body clear the infection. It is important to take it at the intervals prescribed to keep effective levels in the body.

Stopping too early can contribute to incomplete treatment; always follow the prescriber’s instructions unless they tell you to stop (for example, due to a reaction).

Dose and duration depend on age, weight, infection type, and kidney function. It is often taken two or three times a day, with or without food — follow your label.

Liquid formulations should be shaken if instructed, and measured with the supplied spoon or syringe.

Common effects include nausea, diarrhoea, and skin rash. Mild diarrhoea may settle; severe or bloody diarrhoea needs prompt medical advice.

A rash does not always mean allergy, but any rash during antibiotics should be reported — especially if accompanied by itching, swelling, or breathing problems.

Seek urgent help for signs of serious allergy (swelling, wheeze, collapse), severe skin blistering, or persistent high fever with rash.

Rarely, antibiotic-associated colitis causes severe diarrhoea — contact a clinician if diarrhoea is severe or prolonged.

If you miss a dose, take it when you remember unless it is nearly time for the next one. Space remaining doses evenly; do not double up unless your prescriber says so.

Your pharmacist can help if you are unsure how to catch up.

People with true penicillin allergy should not take amoxicillin. Your prescriber will choose an alternative.

Kidney dose adjustment may be needed; always share your full medical history and other medicines.

Amoxicillin can interact with warfarin (monitoring may be needed), methotrexate, and some other drugs. The contraceptive pill’s reliability may be reduced if you vomit severely or have prolonged diarrhoea — your pharmacist can advise.

Always mention all medicines and supplements when antibiotics are prescribed.

Amoxicillin is often used in pregnancy and breastfeeding when a bacterial infection needs treatment.

Your prescriber will choose an antibiotic that is appropriate for you and the infection.

Routine monitoring is not always needed for short courses. Longer or complex treatment may include blood tests if your clinician advises.

If you take warfarin, INR checks may be arranged during and after antibiotics.

If you cannot take penicillins, your prescriber may choose a different antibiotic class based on infection type and local guidance.

Never share antibiotics or use leftovers from a previous course.