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 that would otherwise be degraded by bacterial enzymes, particularly in resistant strains. By inhibiting these enzymes, tazobactam extends the spectrum of the accompanying antibiotic, making it effective against a broader range of bacteria, including those producing extended-spectrum beta-lactamases (ESBLs). It is especially valuable in treating severe infections like intra-abdominal infections, pneumonia, and urinary tract infections caused by multidrug-resistant organisms. Its role is critical in hospital settings where antibiotic resistance is a major concern.