Tazobactam acid is primarily used as a beta-lactamase inhibitor in combination with beta-lactam antibiotics, such as piperacillin. It helps restore the effectiveness of antibiotics against beta-lactamase-producing bacteria, which would otherwise break down the antibiotic and render it ineffective. This combination is widely used in treating serious infections including intra-abdominal infections, pneumonia, and urinary tract infections caused by resistant organisms. Its role in overcoming bacterial resistance makes it a critical component in hospital settings for managing multidrug-resistant infections.