Pioneer 6 is mainly used clinically for pharyngitis, tonsillitis, rhinitis, sinusitis, otitis media, bronchitis, pneumonia, as well as genitourinary tract infections, intestinal tract and soft tissue infections caused by sensitive bacteria. Pioneer 6, also known as cefradin, belongs to the first generation of cephalosporins. Pioneer 6 has strong bactericidal effect on Gram-cocci, weak effect on Gram-negative bacteria, bactericidal effect on Streptococcus aureus, Staphylococcus epidermidis and Pneumococcus, and effective on Meningococcus and Diphtheria bacilli. Its drug-resistant Staphylococcus aureus, Klebsiella pneumoniae, etc., also has a greater killing effect. It has antibacterial effect on Escherichia coli, as well as some Aspergillus.