Phenylpropanolamine belongs to the sympathomimetic amine class of drugs and is structurally related to ephedrine. The effects of phenylpropanolamine are largely the result of alpha-adrenergic agonist activity resulting from both direct stimulation of adrenergic receptors and release of neuronal norepinephrine. Phenylpropanolamine is mainly used as a nasal decongestant. Phenylpropanolamine is also used as anorexiant in obesity and to treat urinary incontinence in veteranary. Phenylpropanolamine containing products has been withdrawn by FDA due to the association of phenylpropanolamine use with increased risk of hemorrhagic stroke.

Tosylchloramide or N-chloro tosylamide, sodium salt, sold as chloramine-T, is an investigational animal drug used in the aquaculture industry and also is a very effective odor control compound. It has other applications that include: algaecide, bactericide, germicide, parasite control, and for drinking water disinfection. It is also highly effective against bacteria, viruses, and spores. In the aquaculture and aquafarming industries, Chloramine -T (Tosylchloramide Sodium Salt) is used to treat external bacterial infections in salmonid fish such as koi, salmon, trout, and whitefish. In the personal care industry, it is used in hydrotherapy treatments to revitalize, maintain, and restore health. Hydrotherapeutic applications include whirlpools, saunas, steam baths, foot baths, and sitz baths. Chloramine-T is also used for disinfection in saunas, solariums, gyms, sport centres, kitchens, sanitary facilities, and air conditioning units. As an anti-microbial agent,Chloramine-T (Tosylchloramide Sodium Salt) it has had widespread use in a broad range of practices, including medical, dental, verterinary food processing and agricultural. It also has been used in direct contact with tissues because it has a low degree of cytotoxicity. Within the United States of America, the use of Chloramine-T is more restricted. Disifin (Tosylchloramide) destroys DNA and thereby prevents microbes from. DISIFIN® Tablets are effective against a whole series of microorganisms, including grampositive and gram-negative bacteria, enveloped and non-en reproducing.

Melengestrol is a steroidal progestin and antineoplastic agent which was never marketed. An acylated derivative, melengestrol acetate, is used as a growth promoter in animals. Melengestrol acetate (MGA) is one of six steroidal hormone growth promoters approved for use in Canada and USA. These products are used to improve growth rate and feed efficiency, as well as to suppress estrus in beef heifers (CFIA 2008). They are not approved for use in any species other than beef cattle meant for slaughter. MGA is the only drug of its kind that is administered in animal feed, and its labelled dose in Canada is 0.4mg per heifer per day (CFIA 2008). A mandatory withdrawal of 2 days before slaughter is applied to any animal that is administered MGA.

Morantel (1,4,5,6-tetrahydro-1-methyl-2-[2-(3-methyl-2-thienyl)ethenyl pyrimidine) is a tetrahydro-pyrimidine anthelmintic, differing from the related analogue pyrantel by the presence of a methyl group on the thiophene ring. Morantel tartrate, manufactured by Pfizer, Inc., was approved in the United States for use in cattle in 1981, and entered the market in early 1982. Three formulations have been approved in the United States: RUMATEL® Medicated Premix-88; RUMATEL Cattle Wormer Bolus, and PARATECT FLEX™ Diffuser, a sustained release bolus. It is intended to treat roundworms and tapeworms. Morantel is administered in lactating and non lactating cattle as morantel tartrate as a slow-release bolus (11.8 g morantel base per animal) or as a single oral dose of 6 to 7.5 mg morantel base/kg bw and in pigs at a single dose equivalent to 7.5 mg base/kg bw. In sheep, the citrate salt is administered at a single dose equivalent to 5 to 6 mg morantel base/kg bw. Morantel acts as a potent agonist at the acetylcholine receptors on the muscle cells of nematodes. Activation of the acetylcholine receptors induces a prolonged, spastic paralysis of the worms and expulsion from the host. It also been reported to block neurotransmission in vertebrates, to possess nicotine-like properties and to mimic acetylcholine at receptors in autonomic ganglia, adrenal medullae and respiratory tissues. Morantel and its salts are not used in human medicines.

Salinomycin as a promising anticancer drug candidate exerts anti-angiogenic and anti-tumorigenic activities by inhibiting vascular endothelial growth factor receptor 2-mediated angiogenesis. Its salt, salinomycin sodium, is an ionophore anticoccidial for use in chickens to prevent coccidiosis caused by Eimeria tenella, E.necatrix, E.acervulina, E.maxima, E.brunetti and E.mivati.

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.

Nicarbazin, a complex of two compounds, 4,4'-dinitrocarbanilide (DNC) and 4,6-dimethyl-2-pyrimidinol (HDP) is an effective drug for preventing intestinal and caecal coccidiosis in poultry. It is used for prevention rather than the treatment of disease. Nicarbazin was the first agent with “broad‐spectrum” activity against Eimeria spp. of chickens. Nicarbazin is used as a single agent or in combination with polyether antibiotics (narasin, or maduramicin), roxarsone, or antibiotics (lincomycin, bacitracin, flavomycin) for prevention and control of coccidiosis caused by Eimeria spp. (all relevant species) in broiler chickens. Nicarbazin can cause increased sensitivity to heat stress, which may result in growth depression and even mortality in broilers; death may be due to cell degeneration processes in liver and kidneys; at the recommended dose, the drug causes occasionally toxic effects in laying hens like reduced hatchability and interruption of egg-laying. Nicarbazin interferes with the formation of the vitelline membrane, separating the egg yolk and egg white. The exact mode of action is unknown, although it is thought nicarbazin interferes with cholesterol metabolism in the formation of the membrane.

Amprolium Hydrochloride is a broad spectrum, potent coccidiostat (anti-protozoal) used for the treatment and prevention of Coccidiosis in cattle, goats, sheep, and poultry (chicken and turkey) in veterinary. Amprolium probably acts by inhibiting thiamine uptake by parasites and thus creates disorders in the metabolism of parasites.

Cholinergic anthelmintic, Thenium is used against dog and cat hookworms.

Maduramicin is antibiotic isolated from actinobacteria Actinomadura rubra. Maduramicin is used in veterinary as an aid in the prevention of coccidiosis in broiler chickens and turkeys. The compound is reported to be toxic to animals and humans if improperly used or by accident, resulting in heart failure, skeletal muscle degeneration, and even death. Studies have shown that toxicity is due to activation of protein phosphatase 2A, and the manipulation of the ROS-PTEN-Akt-Erk1/2 pathway may be a potential approach to prevent maduramicin -induced cardiotoxicity.