Emetine is a principal alkaloid of ipecac, isolated from the ground roots of Uragoga ipecacuanha. Early use of emetine was in the form of oral administration of the extract of ipecac root, or ipecacuanha. This extract contains several, including cephaeline, and others. The identification of emetine as a more potent agent improved the treatment of amoebiasis. While the use of emetine still caused nausea, it was more effective than the crude extract of ipecac root. Additionally, emetine could be administered hypodermically which still produced nausea, but not to the degree experienced in oral administration. Emetine dihydrochloride hydrate is used in the laboratory to block protein synthesis in eukaryotic cells. It does this by binding to the 40S subunit of the ribosome. Emetine induces hypotension by blocking adrenoreceptors. Also, emetine was identified as a specific inhibitor of HIF-2α protein stability and transcriptional activity. Heavy or over usage of emetine can carry the risk of developing proximal myopathy and/or cardiomyopathy.

Amorolfine (or amorolfin), is a morpholine antifungal drug with broad spectrum of activity. Its fungicidal action is based on an alteration of the fungal cell membrane targeted primarily on sterol biosynthesis. Amorolfine is administered as a nail lacquer in patients suffering from onychomycosis, as a cream in patients suffering from dermatomycosis. Amorolfine is well tolerated. The local adverse effects observed were mainly burning and itching.

Octenidine dihydrochloride is a cationic surfactant, with antimicrobial activity against Gram-positive and Gram-negative bacteria. Octenidine approved as a medicinal substance in several European countries and used for skin antisepsis in combination with aliphatic alcohols, e.g. propan-1-ol and propan-2-ol, or with detergents such as antiseptic soap. Octenidine is also used for antisepsis on wounds and mucosa either as a single substance, as an approved combination of Octenidine and phenoxyethanol. Octenidine is virtually not absorbed via the skin or mucous membranes. Because Octenidine is only approved and used topically and is virtually not absorbed, no systemic effects are to be expected. Therefore, no further pharmacokinetic studies or studies on behalf of metabolism have been conducted. Octenidine is easy and safe to handle, chemically stable, not inflammable, without resistance development and low toxicity to man and the environment alike. Its popularity among therapists and wound care specialists is based on good clinical results, easy and pain-free application and local tolerance. Beside readily available combinations with phenoxyethanol, mouth rinses, and vaginal applications, semi-fluid preparations and dressings are described.

Dymanthine (Thelmesan) is an Anthelmintic, it is prepared as the hydrochloride and has some activity against hookworm infection, ascariasis, trichuriasis and hymenolepiasis. The drug appears to be safe, well tolerated and to cause few side effects (nausea, vomiting, headache, diarrhea, giddiness).

Melarsomine (melarsomine dihydrochloride) is an organic arsenical chemotherapeutic agent and is a trypanocidal antiparasitic drug. As of 2016 DIROBAN, a generic melarsomine dihydrochloride product, is the only FDA-approved treatment for adult heartworm (Dirofilaria immitis) infection in dogs. It is not approved for treatment in cats, or dogs in late-stage infection. It is marketed by Merial under the trade name Immiticide and is not currently available in the U.S. due to a manufacturing shortage. Sponsored by Anzac Animal Health, LLC and distributed by Zoetis, Inc., DIROBAN is a prescription animal drug supplied as a sterile powder that must be reconstituted with an accompanying sterile water diluent. The exact mode of action on D. immitis is unknown. Post-treatment mortality due to thromboembolism and/or progression of the underlying disease may occur in 10 to 20% of the Class 3 patients treated with DIROBAN.

Solasulfone (sulphetrone) was used in drug therapy of leprosy. It was also used in a chemotherapy of pulmonary tuberculosis. Sulphetrone has a low toxicity and an antituberculous efficiency approaching that of its parent compound, diaminodiphenylsulphone; it is also curative in infections due to beta-haemolytic streptococci.

Sulfaquinoxaline is a veterinary drug, which can be given to animals to treat coccidiosis and Acute Fowl cholera. It has often used in combinations with others drugs. It had its origins in the chemical synthetic program that sprang from the introduction of sulfonamide drugs into human medicine in the 1930s. The program was sustained through the years of World War II despite declining clinical use of that chemical class. Several sulfa drugs were known to be active against the sporozoan parasite (Plasmodium spp.) that causes malaria, but were not satisfactory in clinical practice. A sulfonamide that had a long plasma half-life would ipso facto be considered promising as an antimalarial drug. Sulfaquinoxaline, synthesized during the war, was such a compound. It proved too toxic to be used in human malaria, but was found to be a superior agent against another sporozoan parasite, Eimeria spp., the causative agent of coccidiosis in domestic chickens. In 1948 sulfaquinoxaline was introduced commercially as a poultry coccidiostat. The action mechanism of sulfaquinoxaline is to inhibit the dihydrofolate synthetase to encumber the nucleate synthesis of bacterium and coccidian its active peak to coccidian is at the second schizont stage (the fourth day of coccidial life cycle), so it will not affect the anti-coccidial immunity in chicken.

Troclosene is chlorinated hydroxytriazine and it is used as a source of free available chlorine, in the form of hypochlorous acid, for the disinfection of water. It kills bacteria, bacterial spores, cysts, algae, fungi, protozoa and virus and are especially lethal to Entamoeba histolytica. Troclosene kills mastitis-causing organisms. It is now widely available for household water treatment. It does not prevent diarrhea but improved water quality.

Fusidic acid is a anti-bacterial agent, initially isolated from Fusidium coccineum by Godtfredsen et al (Leo Pharma) in 1960. It is discussed that fusidic acid exerts its anti-microbial effect by inhibiting bacterial elongation factor G, thus suppressing the protein synthesis. Fusidic acid is widely used in Europe under the names Fucidin H(fusidic acid / hydrocortisone acetate), Fucidin (fusidic acid / sodium fusidate) and Fucicort (fusidic acid / betamethasone valerate) for the treatment of primary/secondary skin infections and inflammatory dermatoses.

Monensin is an antibiotic produced as a byproduct of fermentation by Streptomyces cinnamonensis and belongs to a family of drugs known as polyether antibiotics or ionophores. The drug was approved by FDA for the prevention of coccidiosis in turkeys, chickens, quail, cattle, goats, calves (Coban, Rumensin). The exact mechanism of monesin action is unknown, however there are several hypotesis, which includes the inhibition of K+ transport, the inhibition of the transport of carbohydrates across the host cell membrane, the interruption host cell invasion by sporozoites, etc.