Penicillin
Antibiotics are used to treat or prevent some types of bacterial infection. They work by killing bacteria or preventing them from reproducing and spreading.
Read about the uses of antibiotics, including treating or preventing some types of bacterial infections
Read about things to consider when taking the six main classes of antibiotics.
The most common side effects of antibiotics affect the digestive system. These occur in around 1 in 10 people.
Antibiotics can sometimes interact with other medicines or substances. This means it can have an effect that is different to what you expected.