Which of the following is a common use of ampicillin?

Ampicillin is a type of penicillin antibiotic used primarily for its effectiveness in treating various bacterial infections. It works by inhibiting the growth of bacteria, making it a vital option in the treatment of infections caused by susceptible microorganisms. This includes conditions like respiratory tract infections, urinary tract infections, meningitis, and gastrointestinal infections.

The other options pertain to different types of medical concerns. Viral infections typically require antivirals rather than antibiotics, as antibiotics like ampicillin are ineffective against viruses. Reducing inflammation is usually addressed with anti-inflammatory medications rather than antibiotics. Controlling blood pressure is managed with antihypertensive drugs, which are not related to the action of antibiotics like ampicillin. Hence, the common and appropriate use of ampicillin lies in its role in treating bacterial infections.