Polymyxin B is a lipopeptide antibiotic isolated from Bacillus polymyxa. Its basic structure consists of a polycationic peptide ring and a tripeptide side chain with a fatty acid tail. Polymyxin B is a mixture of at least four closely related components, polymyxin B1 to B4, with polymyxin B1 and B2 being the two major components. Polymyxin B acts on Gram-negative bacteria by interacting with lipopolysaccharide (LPS) of the outer membrane and destabilizing it. Polymyxin B is indicated for the treatment of many bacterial diseases such as meningeal infections, urinary tract infections and bacteremia.

Cephradine is a semisynthetic cephalosporin antibiotic. Cephradine is active against the following organisms in vitro: Group A beta-hemolytic streptococci; Staphylococci, including coagulase-positive, coagulase-negative, and penicillinase-producing strains; Streptococcus pneumoniae (formerly Diplococcus pneumoniae); Escherichia coli; Proteus mirabilis; Klebsiella species; Hemophilus influenza. It works by stopping the growth of bacteria. It is used to treat a wide variety of bacterial infections (e.g., skin, ear, respiratory and urinary tract infections). Pseudomembranous colitis has been reported in patients receiving cephradine both orally and intravenously. Diarrhea generally starts 1 to 16 days after starting cephradine therapy. Gastrointestinal side effects have included nausea, vomiting. Hypersensitivity reactions have included rash, urticaria, pruritus, and joint pain. Bacteriostats may interfere with the bactericidal action of cephalosporins in acute infection; other agents, e.g., aminoglycosides, colistin, polymyxins, vancomycin, may increase the possibility of nephrotoxicity.

Capreomycin is an antibiotic, which is used in combination other antituberculosis drugs fro the treatment of pulmonary infections caused by capreomycin-susceptible strains of M. tuberculosis when the primary agents (isoniazid, rifampin, ethambutol, aminosalicylic acid, and streptomycin) have been ineffective or cannot be used because of toxicity or the presence of resistant tubercle bacilli. Little is known about capreomycin's exact mechanism of action, but it is thought to inhibit protein synthesis by binding to the 70S ribosomal unit. Capreomycin also binds to components in the bacterial cell which result in the production of abnormal proteins.

Sulfomyxin is an antibacterial sulfonamide. It is intended for use in chickens and turkeys as an aid in the treatment of disease caused or complicated by E. coli, such as colibacillosis and complicated chronic respiratory disease.

Butirosin is water-soluble aminoglycosidic antibiotic complex which is active against both Gram-positive and Gram-negative bacteria. Butirosin is less toxic than neomycin and shows a good antibacterial activity, including Pseudomonas aeruginosa, which is resistant to neomycin, ribostamycin and kanamycin.