Widely used in the treatment of bacterial infections caused by gram-positive organisms, particularly Streptococcus and Clostridium species. Effective in managing conditions such as strep throat, pneumonia, endocarditis, and tetanus. Often administered in hospital settings for severe infections due to its narrow spectrum and high potency against susceptible bacteria. Commonly used in surgical prophylaxis to prevent postoperative infections. Preferred in penicillin-susceptible infections when rapid bacterial killing is required. Not effective against beta-lactamase-producing organisms or most gram-negative bacteria.