Ampicillin is a type of antibiotic that belongs to the penicillin group. It is used to treat various bacterial infections, including those affecting the ears, lungs, and urinary tract. Ampicillin works by stopping the growth of bacteria, making it effective against a wide range of infections. This medication can be taken orally or given through an injection, depending on the severity of the infection. Common side effects may include nausea, diarrhea, and allergic reactions. It is important to complete the full course of Ampicillin as prescribed by a healthcare professional to ensure the infection is fully treated.