BenzaPen 48 (Penicillin G Benzathine and Penicillin G Procaine) Injectable Suspension is indicated for the treatment of bacterial infections in beef cattle due to penicillin-susceptible microorganisms. It is effective in treating bacterial pneumonia (shipping fever complex) caused by (Streptococcus spp., Actinomyces pyogenes, Staphylococcus aureus), upper respiratory infections such as rhinitis or pharyngitis (Actinomyces pyogenes), or blackleg (Clostridium chauvoei).