Clomocycline is the approved name of a methylol derivative of chlortetracycline. Clomocycline is a tetracycline antibiotic that is commonly prescribed by medical doctors for infections and to treat acne. It may also be used to treat urinary tract infections, gum disease, and other bacterial infections such as gonorrhea and chlamydia. Clomocycline is also used commonly as a prophylactic treatment for infection by Bacillus anthracis (anthrax). It is also effective against Yersinia pestis and malaria and is also prescribed for the treatment of Lyme disease. Clomocycline inhibits cell growth by inhibiting translation. It binds to the 30S ribosomal subunit and prevents the amino-acyl tRNA from binding to the A site of the ribosome. The binding is reversible in nature. Clomocycline is lipophilic and can easily pass through the cell membrane or passively diffuses through porin channels in the bacterial membrane. This drug has been reported to be noticeably free of side-effects such as nausea, vomiting, and diarrhea.

Cefquinome is a 4th generation cephalosporin which is active against a broad spectrum of Gram positive and Gram negative bacteria. As many cephalosporin it acts by binding to bacterial PBP and thus inhibiting the cell wall synthesis. Cefquinome is approved for veterinary use in cattles with respiratory tract infections, skin infections, bacterial mastitis and septicaemia.

Albendazole oxide (Ricobendazole) is a methylcarbamate benzimidazole with a broad-spectrum anthelmintic activity. Ricobendazole is a key metabolite of albendazole. Ricobendazole has broad spectrum anthelmintic action; the drug is active against adult and immature nematodes (Dictyocaulus, Haemonchus, Ostertagia, Thelazia, Trichostrongylus, Nematodirus, Cooperia, Oesophagostomum, Bunostomum, Chabertia etc.), tapeworms (Moniezia, Avitellinae, Thysaniezia etc.), as well as adult flukes (Fasciola, Paramphistom, and Dicrocoelium), having an egg-killing effect; it reduces pasture contamination with helminth eggs. The mechanism of action of ricobendazole (albendazole sulfoxide), ensuring its anthelmintic activity, is associated with selective inhibition of beta-tubulin polymerization, which leads to the destruction of cytoplasmic microtubules of helminth intestinal cells; it inhibits the processes of glucose transport and disposal, and inhibits the synthesis of ATP; it blocks the movement of secretory granules and other organelles in the muscle cells of worms, disrupting the permeability of cell membranes and muscle innervation, which causes paralysis and death of the parasites. Albendazole oxide has been shown to induce apoptosis in human cancer cell line HT-29, possibly by arresting the cell cycle at the G2/M phase.

Pipacycline is a semi-synthetic tetracycline formed by a Mannich condensation of formaldehyde and 4-hydroxyethyl piperazine with tetracycline. The introduction of the piperazine improves bioavailability, but Mannich bases are pro-drugs, converting back to the parent compound. Pipacycline is used commercially as a salt in combination with penicillin V for parenteral use (penimepicycline). Penimepicycline exerts a bactericidal action on the streptococci, and a bacteriostatic action on various gram-positive and gram-negative bacilli, as well as on the penicillin-resistant staphylococci.

Cefpirome is a semisynthetic, broad-spectrum, fourth-generation cephalosporin with antibacterial activity. Cefpirome binds to and inactivates penicillin-binding proteins (PBPs) located on the inner membrane of the bacterial cell wall. PBPs are enzymes involved in the terminal stages of assembling the bacterial cell wall and in reshaping the cell wall during growth and division. Inactivation of PBPs interferes with the cross-linkage of peptidoglycan chains necessary for bacterial cell wall strength and rigidity. This results in the weakening of the bacterial cell wall and causes cell lysis. Cefpirome is an injectable extended-spectrum or 'fourth generation' cephalosporin. Its antibacterial activity encompasses many of the pathogens involved in hospital-acquired infections such as Enterobacteriaceae, methicillin-susceptible Staphylococcus aureus, coagulase-negative staphylococci and viridans group streptococci. Cefpirome also has in vitro activity against Streptococcus pneumoniae regardless of penicillin susceptibility. It is stable against most plasmid- and chromosome-mediated beta-lactamases, with the exception of the extended-spectrum plasmid-mediated SHV enzymes. Intravenous cefpirome 2g twice daily has shown clinical efficacy comparable to that of ceftazidime 2g 3 times daily in the treatment of hospitalised patients with moderate to severe infections. Clinical response and bacteriological eradication rates were similar in patients with severe pneumonia or septicaemia treated with either cefpirome or ceftazidime. Cefpirome appeared more effective than ceftazidime in the eradication of bacteria in patients with febrile neutropenia in 1 study; however, clinical response rates were similar in the 2 treatment groups. The tolerability of cefpirome appears similar to that of ceftazidime and other third generation cephalosporins, diarrhoea being the most frequently observed event. Thus, cefpirome is likely to be a valuable extended-spectrum agent for the treatment of severe infections. Cefpirome offers improved coverage against some Gram-positive pathogens and Enterobacteriaceae producing class I beta-lactamases compared with the third generation cephalosporins, although this has yet to be demonstrated in clinical trials.

Zilantel is anthelmintic drug and pesticide. In particular, it was tested against adult worms Toxocara canis.

Piromidic acid, a quinolone antibiotic has an inhibitory effect against hepatic stages of P. falciparum and P. yoelii yoelii, and has a potential for treatment or prevention of malaria through their unique antiparasitic effect against erythrocytic and hepatic stages of Plasmodium.

Derquantel is a so-called spiroindole, is obtained from fermentation extracts of Penicillium simplicissimum, a particular species of soil fungi. This drug is used in veterinary under brand name Startect, in combination with abamectin against several gastrointestinal roundworms that affect sheep. At the recommended therapeutic dose derquantel is highly effective against Haemonchus spp, Cooperia spp, and Trichostrongylus spp, including those resistant to most classic anthelmintics (benzimidazoles, levamisole, macrocyclic lactones). However it has a lower and variable efficacy against Ostertagia spp (= Teladorsagia), and is basically ineffective against Oesophagostomum spp and Trichuris spp, other important gastrointestinal worms of sheep. It is also ineffective against lungworms and other roundworms that infect sheep outside the gastrointestinal system. Derquantel is a nicotinic cholinergic antagonist: it blocks cholinergic neuromuscular transmission. The effect on the worms is that they are paralyzed and die or are expelled.

Dibekacin is a semisynthetic aminoglycoside antibiotic useful in the treatment of severe gram-negative bacterial infections. The drug is marketed in Japan.

Butonate is a veterinary anti-parasitic drug, which was approved by FDA, but lately voluntarily withdrawn.