Our Symptom checker provides clinical advice on what to do next based on your symptoms.
Allergies can make conditions such as asthma and hayfever worse. Find out more here about different types of allergy tests and when they are useful.
Cat and dog allergy
Allergies to cats and dogs are common, and symptoms can be severe. Learn more about how to live with a pet allergy.
Allergies and hypersensitivities
An allergic reaction occurs when the immune system overreacts to a substance. Find out about common allergies, their symptoms and treatments.
Grass allergy causes someone to have an allergic reaction to grass pollen spread by the wind. Learn more about its symptoms, diagnosis and treatment.
Antibiotics revolutionised medicine in the 1940s because they treated infections caused by bacteria. Learn how antibiotics work and how to take them.
Penicillin is the name given to a widely-used group of antibiotic drugs. Penicillin can have side-effects, and some people suffer allergic reactions. Find out more here.
Doxycycline is an antibiotic medicine. This page explains what doxycycline is used for, how it works, its risks and other treatment options available in its place.
Cefalexin is used to treat bacterial infections in various parts of the body. This page explains how cefalexin works, its risks and other treatment options available in its place.
What is the difference between bacterial and viral infections?
Bacterial and viral infections must be treated differently. Misusing antibiotics to treat viral infections leads to the problem of antibiotic resistance.
Antibiotic-resistant gonorrhoea has increased
Cases of gonorrhoea have risen in Australia, and many people don't know they have it. But this STI can cause infertility if left untreated.