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Allergic reactions to antibiotics

Some people have an allergic reaction to antibiotics. Learn about the symptoms and the difference between allergic reactions and side effects.

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Antibiotics

Antibiotics revolutionised medicine in the 1940s because they treated infections caused by bacteria. Learn how antibiotics work.

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Penicillin

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.

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Doxycycline

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.

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Cefalexin

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.

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Allergies

Trusted information about allergy types, as well as allergy testing, anaphylaxis, antihistamines and common related conditions such as asthma and hay fever.

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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.

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Grass allergy

Grass allergy causes someone to have an allergic reaction to grass pollen spread by the wind. Learn more about its symptoms, diagnosis and treatment.

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Allergies and hypersensitivities

An allergic reaction occurs when the immune system overreacts to a foreign substance that usually causes few or no problems in most people.

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Antibiotic resistance

Here’s important information about what antibiotics treat and don’t treat, an explanation of 'superbugs' and how antibiotic resistance can be reduced.

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