By a practising Australian GP
It’s 2 a.m. Your child is crying with ear pain, a fever, and you have work tomorrow. You’ve been pacing the hallway, trying to comfort them, and all you can think is, “I need something that works — now.” Or perhaps you’re the one suffering: burning urine, back pain, chills, and a fear that a simple infection might spread to your kidneys. For Australians over 30, these moments are not just clinical problems — they mean missed work, sleepless nights, anxious trips to the GP, and worry about how much the medicine will cost.
As a doctor, I have one antibiotic I turn to more than almost any other for common bacterial infections: amoxicillin. It has been trusted for over 50 years, is safe for children and adults, is listed on the Pharmaceutical Benefits Scheme (PBS), and it works quickly when used correctly. This article explains why amoxicillin deserves a place in your family’s medicine cabinet — and why you should ask your doctor about it next time an infection strikes.
Amoxicillin is a broad-spectrum penicillin antibiotic. It works by blocking the construction of bacterial cell walls, causing the bacteria to burst and die. It is absorbed well by mouth, reaches therapeutic levels quickly, and has a safety profile that makes it suitable for infants, pregnant women, older adults, and most people with mild renal impairment.
Below is a summary of how amoxicillin is used in real Australian practice, including several conditions you may have heard about or experienced.
| Condition | How Amoxicillin Is Prescribed |
|---|---|
| Otitis media in children | For acute middle-ear infection in children, amoxicillin is the first-line antibiotic recommended by Australian guidelines when antibiotics are needed. It is usually prescribed as a high-dose regimen of 90 mg per kilogram per day, divided into two doses, for 5 days (up to a maximum of 3 g per day). The liquid suspension is palatable, making it easier to give to young children. It reduces ear pain, fever, and the risk of eardrum perforation. |
| Osteomyelitis | Yes, amoxicillin can be used for osteomyelitis (bone infection), but only when the causative bacteria are known to be susceptible. In many cases, it is used as an oral step-down therapy after initial intravenous antibiotics, especially for infections caused by streptococci or enterococci. Your doctor will confirm susceptibility with a culture and may use higher doses for longer durations (often 4–6 weeks). |
| Pyelonephritis | Amoxicillin is not usually first-line for kidney infection (pyelonephritis) because the most common cause, E. coli, is often resistant to plain amoxicillin in Australia. However, if a urine culture shows the organism is sensitive, amoxicillin may be used. In most cases, your doctor will start with broader options such as amoxicillin-clavulanate, cephalexin, or ciprofloxacin, then switch to amoxicillin if appropriate. |
| Group B streptococcus in pregnancy | Amoxicillin can be used for susceptible group B streptococcus (GBS) in pregnancy, particularly for treating GBS urinary tract infection or asymptomatic bacteriuria. However, for preventing newborn infection during labour, intravenous penicillin G remains the standard of care. Amoxicillin is an acceptable alternative for women with a non-severe penicillin allergy, but it is not used to “eradicate” vaginal GBS colonisation permanently. |
When you are unwell or your child is suffering, you want a treatment that is effective, safe, affordable, and convenient. Amoxicillin delivers on all four.
In Australia, amoxicillin is listed on the Pharmaceutical Benefits Scheme (PBS). This means the government subsidises the cost. Most patients pay only a small co-payment (around $7.30 for concession card holders and up to about $31.60 for general patients, depending on the pack and current PBS pricing). Without PBS subsidy, private scripts can cost much more. This makes amoxicillin one of the most cost-effective antibiotics available at every Australian pharmacy.
Amoxicillin has a well-established safety record. It can be used during pregnancy and breastfeeding, in children as young as a few weeks old, and in older adults with dose adjustment for kidney function. The most common side effects are mild: nausea, loose stools, or a non-allergic rash. A serious allergic reaction is rare but possible, so always tell your doctor if you have a penicillin allergy.
From a child’s ear infection to a streptococcal sore throat, from dental abscess to susceptible urinary tract infection, amoxicillin targets the bacteria that cause pain, fever, and lost days at work or school. Because it is absorbed well orally, you can usually be treated at home rather than in hospital — a major benefit for busy families and anyone wanting to avoid a hospital admission.
| Concern | What You Need to Know |
|---|---|
| Can amoxicillin cause pseudomembranous colitis? | Yes, like any antibiotic, amoxicillin can disrupt the normal gut flora and allow Clostridioides difficile to overgrow, causing pseudomembranous colitis. This is rare, but if you develop severe, watery diarrhoea, abdominal cramping, or fever during or after treatment, stop the antibiotic and contact your doctor immediately. The risk is low when amoxicillin is used appropriately and for the shortest effective duration. |
| Can amoxicillin cause photosensitivity? | Amoxicillin is not strongly associated with photosensitivity compared with tetracyclines or fluoroquinolones. However, rare cases of sun sensitivity or rash after sun exposure have been reported. As a precaution, use sunscreen and protective clothing while taking amoxicillin, especially if you have a history of drug-induced photosensitivity. |
| Why is amoxicillin not effective for viral infections? | Amoxicillin targets bacterial cell walls. Viruses are completely different — they do not have cell walls and replicate inside human cells. Using amoxicillin for a cold, flu, COVID-19, or viral sore throat will not help and can cause side effects and antibiotic resistance. Your doctor will only prescribe it when a bacterial infection is likely or confirmed. |
These concerns do not reduce my confidence in amoxicillin. They simply mean it must be used wisely. When prescribed correctly, amoxicillin offers an excellent balance of benefit and risk — exactly what you want for yourself and your family.
If you or your child has symptoms of a bacterial infection — severe ear pain, a sore throat with pus, a urinary tract infection, or a dental abscess — do not wait. Book a telehealth or in-person appointment with your GP. Ask your doctor whether amoxicillin is appropriate for your specific condition. With a PBS prescription, you can collect it from any Australian pharmacy for a small co-payment and start treatment on the same day.
Remember these key points:
Amoxicillin has stood the test of time because it works. It is safe, affordable, and widely available under the PBS. Next time infection disrupts your life, ask your doctor whether amoxicillin is the right choice for you. Take control of your family’s health with a trusted antibiotic that Australian doctors have relied on for decades.