Teclozan, an antiprotozoal agent, was used to treat the intestinal amebiasis. Teclozan prevents the formation of arachidonic acid in the parasite by intervening in the phospholipid metabolism.

Trichlorfon (Metrifonate), the organophosphorous cholinesterase inhibitor, O,O-dimethylhydroxy-2,2,2-trichlorethyl-phosphonate, has been used sporadically in the treatment of human schistosomiasis for a decade. It has selective and variable schistosomicidal activity against S. haematobium that results from its partial metabolism to a highly active anti-cholinesterase, dichlorvos. Schistosomal cholinesterase is more susceptible to this metabolite than that of the human host, but transient reductions in both plasma and erythrocyte cholinesterase activity are demonstrable at therapeutic dosage. However, despite early concerns about its potential toxicity, metrifonate is well tolerated and has been used effectively and extensively in large-scale control programmes. Its potential to enhance central nervous system cholinergic neurotransmission led to clinical trials for the treatment of people with Alzheimer's disease (AD).

Bephenium is an anthelmintic agent formerly used in the treatment of hookworm infections and ascariasis (as a hydroxynaphthoate salt). Bephenium exerts its anti-helminthic action by inducing muscle contraction in parasites. The contraction is suggested to be mediated by B-type AChR receptors, which are activated upon administration of bephenium.

Arterolane is an anti-malarial drug developed by Ranbaxy Laboratories. Arterolane belongs to peroxidic antimalarial compounds. Upon administration, the drug is activated by heme of hemoglobin digested by malarial parasite. Activation produces free radicals, leading to alkylation of heme and proteins, critical for the survival of the parasite. Arterolane was approved for marketing in India in 2012 and received marketing authorization in several African countries in 2014.

Dibutyl succinate is used as an insecticide, surfactant and insect attractant. Preliminary investigations have found that dibutyl succinate exhibits insulinotropic action on isolated islet cells suggesting that it may have some application for the treatment of diabetes.

Dixanthogen was used topically against scabies, but now this treatment is not available.

Bioallethrin is a synthetic pyrethroid with fast knock-down activity against household pest insects. It is used in public health against mosquitoes, houseflies and cockroaches. Bioallethrin is a mixture of two of the allethrin isomers, [1R,trans;1R] and [1R,trans;1S] in an approximate ratio of 1:1. Bioallethrin is used as a component of spray for the treatment of pediculosis.

Broxyquinoline is an anti-infective agent. It exerts activity against fungi and protozoa. Broxyquinoline (Intestopan) has been used in the treatment of diarrhoeas of different aetiology. Broxyquinoline is able to promote neovascularization.

Acetarsone is a pentavalent arsenical compound with antiprotozoal and antihelmintic properties. It was first discovered in 1921 at Pasteur Institute by Ernest Fourneau, and sold under the brand name Stovarsol (fourneau is the French word for stove). Before stovarsol was used in the treatment of congenital syphilis, it had already been used in other diseases : amoebiasis, acquired syphilis, yaws, trypanosomiasis and malaria, and a formidable list of toxic manifestations can be compiled from the literature. Bender (I927) recorded six cases of poisoning with malaise, fever, cedema, jaundice, diarrhoea, albuminuria, bronchitis, coryza and skin troubles, such as diffuse erythema, dryness and pruritus. Of 232 cases of amoebiasis treated by Brown (I935) without a death, thirteen (5.6%) had toxic erythemata, some of them so severe as to amount to exfoliative dermatitis. Although its mechanism of action is not fully known, acetarsone may bind to protein-containing sulfhydryl groups located in the parasite, thereby forming lethal As-S bonds. This may prevent their functioning and eventually kill the parasite.