What is an antibiotic used for?

An antibiotic is a medication designed to fight bacterial infections by either killing bacteria or stopping their growth. Antibiotics do not work against viruses, so they are ineffective for illnesses like the flu or common cold. Common antibiotic types include penicillin, amoxicillin, and tetracycline. Doctors prescribe them for infections such as pneumonia, urinary tract infections, and strep throat. Misuse or overuse of antibiotics can lead to antibiotic resistance, making infections harder to treat. It is essential to complete the full prescribed course and avoid self-medication. Responsible antibiotic use protects both individual and public health.