Cefmatilen (codenamed S-1090) is an orally-active cephalosporin antibiotic, that shows high activity against a variety of Gram-positive and Gram-negative bacteria, including Streptococcus pyogenes and Neisseria gonorrhoeae.

Protiofate (Atrimycon), a molecule derived from thiophene, is a topical fungicide. It was used for the treatment of trichomonal and fungal infections.

Nifurzide, a synthetic antimicrobial agent of the nitrofuran group. The MICs were excellent for Campylobacter spp. (97 strains); slightly higher for Shigella spp. (50 strains) and Aeromonas spp. (22 strains); and highest for Salmonella spp. (100 strains) and Yersinia enterocolitica. At low concentrations of nifurzide, the growth rate of the Escherichia coli cultures decreased, and elongated, nonseptate cells appeared. At high concentrations, complete growth inhibition occurred, accompanied by a rather strong bactericidal effect, but the appearance of the cells was normal; in particular, no bacteriolytic effect was observed. A very large number of antibiotic molecules were bound per bacterial cell. After cell disruption, similar amounts of nifurzide were found in the cytoplasm, cytoplasmic membranes, and cell wall, respectively. Nifurzide had no effect on a general infection, but significantly decreased the number of colony-forming germs in the digestive tract. It was rather insoluble in aqueous media, did not cross the intestinal barrier, and was not substantially metabolized in the intestine. The obnoxious side effects of other nitrofurans (induction of vomiting and inhibition of monoamine oxidase) were not observed with nifurzide, which makes it an interesting therapeutic agent against enteric infections.

Nifurpirinol, 6-hydroxymethyl-2-[2-(5-nitro-2-furyl)vinyl]pyridine, has been widely used as an antibacterial drug against diseases of fish. M. Shimizu and Y. Takase showed marked inhibitory activity against many species of bacteria, including several fish pathogens. They found minimum inhibitory concentrations (MIC's) of 0.1 to 0.3 ug of Nifurpirinol (P-7138) per ml of broth medium (ug/ml) for Vibrio anguilIarum, Aeromonas salmonicida, and Aeromonas liquefaciens. The first designation for this drug was "P-7138." Subsequently, "Furanace" was designated as the trade name, and "nifurpirinol" was selected as the generic name.

Nifurtoinol, a nitrofuran-derivative, is an antibacterial drug. Nifurtoinol (Urfadyn PL) is used for the treatment of urinary tract infections. Nifurtoinol-associated hepatic injury cases were reported in Netherlands.

Panipenem is a parenteral carbapenem antibacterial agent with a broad spectrum of in vitro activity covering a wide range of Gram-negative and Gram-positive aerobic and anaerobic bacteria, including Streptococcus pneumoniae and species producing β-lactamases. Panipenem is coadministered with betamipron (Carbenin, Daiichi Sankyo Company) to inhibit panipenem uptake into the renal tubule and prevent nephrotoxicity. In large, randomised clinical trials, panipenem/betamipron demonstrated good clinical and bacteriological efficacy (similar to that of imipenem/cilastatin) in adults with respiratory tract or urinary tract infections.

Fezatione is a fungicidal agent.

Ibafloxacin is a fluoroquinolone antibiotic drug used in veterinary medicine. Ibafloxacin, a fluorinated 4-quinolone, is a broad spectrum antibiotic with bactericidal action against Gram-positive and Gram-negative bacteria. Ibafloxacin is presented in the form of a tablet/oral gel containing a racemic mixture of S- and R-ibafloxacin. The antimicrobial activity of the racemate originates mainly from the S-enantiomer. Ibafloxacin was marketed under the brand name Ibaflin. Ibaflin tablets were intended for use in dogs for treatment of respiratory tract infections, urinary tract infections and dermal infections caused by ibafloxacin susceptible pathogens. Ibafloxacin, is an antibiotic belonging to the class ‘fluoroquinolones’. It works by blocking an enzyme called ‘DNA gyrase’, which is important in allowing bacteria to make copies of their DNA. This enzyme is only found in bacterial cells, and does not have a similar function in animal cells. By blocking DNA gyrase, ibafloxacin prevents the bacteria from making DNA and stops them making proteins and growing, resulting in their death.

Pyronaridine was developed in China and has been registered in that country since the 1980s. Outside China, none of the existing formulations is registered because of the failure to meet international regulatory standards. Pyronaridine is generally active against chloroquine-resistant parasites. Pyronaridine has been investigated for the treatment of Malaria. Pyronaridine targets hematin. Combination of pyronaridine with artesunate was indicated for the blood-stage treatment of both strains of malaria:  P. falciparum and P. vivax.  WHO currently recommends artesunate-pyronaridine in areas where other artemisinin-based combination therapies are failing.

The phthalidyl thiazolidine carboxylic ester of ampicillin, talampicillin (Talpen, Beecham), has been introduced recently to improve absorption and to reduce these side effects. After oral administration talampicillin is rapidly absorbed and hydrolysed by tissue esterases in the intestinal wall to release into the circulation ampicillin and the ester moiety, mainly 2-hydroxymethyl-benzoic acid. No unchanged talampicillin is detectable in the peripheral blood. It is not approved by the FDA for use in the United States