Robenidine (l,3-6ts (p-chlorobenzylidenamino) guanidine hydrochloride) is an effective anticoccidial, first introduced by Kantor, Kennett, Waletzky & Tomcufcik (1970). It does not affect the earliest stages in the coccidial life-cycle and its main activity is against the almost mature first generation schizont. It is used as an aid in the prevention of coccidiosis caused by Eimeria mivati, E. brunetti, E. tenella, E. acervulina, E. maxima and E. necatrix in broiler chickens.

Tylosin (trade names Tylocine, Tylan) is a bacteriostat feed additive used in veterinary medicine. It has a broad spectrum of activity against Gram-positive organisms and a limited range of Gram-negative organisms. It is found naturally as a fermentation product of Streptomyces fradiae. It is a macrolide antibiotic. Tylosin is used in veterinary medicine to treat bacterial infections in a wide range of species and has a high margin of safety. Tylosin is certified by the FDA but is only approved for use in livestock such as cattle, chickens, swine, and turkeys. The FDA has prohibited the use of tylosin in dogs and cats, except where it is specifically prescribed by a veterinarian. Tylosin has a bacteriostatic effect on susceptible organisms, caused by inhibition of protein synthesis through binding to the 50S subunit of the bacterial ribosome.

Clopidol is an anticoccidial drug used in chickens and turkeys in oredr to prevent coccidiosis and leucocytozoonosis. The drug is approved by FDA and is marketed under the names Coyden 25 and Lerbek 25 (in combination with methylbenzoquate).

Decoquinate is a quinolone derivative that is used in the control of coccidiosis in domestic animals. Decoquinate treats and prevents coccidiosis in chickens, cattle, goats, sheep, etc. Decoquinate acts on sporozoites development and prevents their penetration of the gut epithelium. Decoquinate inhibits mitochondrial respiration and electron transport in Eimeria.

Ractopamine is a feed additive to promote leanness in animals raised for their meat. Pharmacologically, it is a TAAR1 agonist and β adrenoreceptor agonist that stimulates β1 and β2 adrenergic receptors. Ractopamine is known to increase the rate of weight gain, improve feed efficiency, and increase carcass leanness in finishing swine. Its use in finishing swine yields about three kilograms of additional lean pork and improves feed efficiency by 10%. Ractopamine is the active ingredient in products known as Paylean for swine and Optaflexx for cattle, developed by Elanco Animal Health, a division of Eli Lilly and Company, for use in food animals for growth promotion. Ractopamine use has been banned in most countries, including the European Union, mainland China and Russia while 27 other countries, such as Japan, the United States, Canada, and South Korea, have deemed meat from livestock fed ractopamine safe for human consumption. Ractopamine is safe for finishing pigs heavier than 240 lb (110 kg) when administered in the diet at concentrations up to 10 ppm and fed for up to 35 days.

Semduramicin is an ionophore coccidiostat used in the poultry industry as a feed additive. Semduramicin is marketed under the brand name Aviax among others, indicated for the prevention of coccidiosis in poultry, caused by Eimeria tenella, E. acervulina, E. maxima, E. brunetti, E. necatrix, and E. mitis.

Zilpaterol is an agonist of β2-adrenergic receptor. Zilpaterol exerts bronchospasmolytic action. Zilmax® (4.8% Zilpaterol hydrochloride) is used to increase rate of bodyweight gain, improve feed efficiency, and increase carcass leanness in cattle fed in confinement for a period of 20-40 consecutive days at the end of the feeding period before slaughter.

Diclazuril is a main component of veterinary drugs used for the treatment of coccidiosis (chickens, turkeys, rabbits, etc) and equine protozoal myeloencephalitis (horses). When used for the treatment of coccidiosis, it acts by causing the degeneration of schizonts and gamonts. While in the animals affected by protozoal myeloencephalitis the drug is believed to inhibit merozoite production. In vivo experiments on horses have shown that the drug may cross the blood brain barrier.

Florfenicol (Nuflor) is a fluorinated synthetic analog of thiamphenicol. Florfenicol is indicated for the treatment of bovine respiratory disease (BRD) associated with Mannheimia (Pasteurella) haemolytica, Pasteurella multocida, and Haemophilus somnus, for treatment of bovine interdigital phlegmon (foot rot, acute interdigital necrobacillosis, infectious pododermatitis) associated with Fusobacterium necrophorum and Bacteroides melaninogenicus. Florfenicol is a broad-spectrum, primarily bacteriostatic, antibiotic with a range of activity similar to that of chloramphenicol, including many gram-negative and gram-positive organisms; however, florfenicol does not carry the risk of inducing human aplastic anemia that is associated with chloramphenicol. It also has activity against some chloramphenicol resistant strains of bacteria, possibly because it is less affected by the major enzyme produced in plasmid-mediated bacterial resistance against chloramphenicol and thiamphenicol. Although the activity of florfenicol against obligate anaerobes is not addressed in the literature, it is likely to be quite effective. Antibiotic principle of Florfenicol is similar to that of chloramphenicol and Thiamphenicol. Florfenicol inhibits protein synthesis by binding to 70S ribosomal 50S subunits of susceptible bacteria, leading to the inhibition of peptidyl transferase and thereby preventing the transfer of amino acids to extending peptide chains and subsequent protein formation. The bacterial receptor that is the site of action for florfenicol is also considered to be the same as that for chloramphenicol and thiamphenicol. Florfenicol has a fluorine atom instead of the hydroxyl group located at C-3 in the structure of chloramphenicol and thiamphenicol. This prevents the acetylation of bacterial acetyltransferase in this site as to allow florfenicol to be less susceptible to deactivation by bacteria with plasmid-transmissible resistance that involves acetylation of the C-3 hydroxyl group in chloramphenicol and thiamphenicol, and prevents their interaction with bacterial ribosomes.

Fenbendazole (FBZ) is a broad-spectrum benzimidazole antiparasitic drug currently approved for use in numerous animal species, including rodents. Although nematodes, and in particular pinworms, are the main endoparasites of concern in laboratory rodents, FBZ also is indicated for use in other animal species against a wide spectrum of nematodes, tapeworms, flukes, and protozoa (Giardia duodenalis, Encephalitozoon intestinalis). The molecular mode of fenbendazole action consists in
binding of beta-tubulin monomer prior to dimerisation with alfa-tubulin which blocks subsequent microtubule formation. These microtubules are important organelles involved in the motility, the division and the secretion processes of cells in all living organisms. In the worms the blocking of microtubules perturbs the uptake of glucose, which eventually empties the glycogen reserves. This blocks the whole energy management mechanism of the worms that are paralyzed and die or are expelled. FBZ have a greater binding to nematode as compared to mammalian tubulin at 37°C. The oral LD50 of p-OH fenbendazole was >10 000 mg/kg b.w. in mice and rats.