Amphotericin B used to treat progressive, potentially life-threatening fungal infections, such as oral thrush, vaginal candidiasis and esophageal candidiasis in patients with normal neutrophil counts. Also, Amphotericin B is often used in otherwise-untreatable protozoan infections such as visceral leishmaniasis and primary amoebic meningoencephalitis. As with other polyene antifungals, amphotericin B binds with ergosterol, a component of fungal cell membranes, forming a transmembrane channel that leads to monovalent ion (K+, Na+, H+ and Cl−) leakage, which is the primary effect leading to fungal cell death. When administered concurrently, the following drugs may interact with amphotericin B: Antineoplastic agents, Corticosteroids and Corticotropin (ACTH); Digitalis glycosides; Flucytosine; Imidazoles (e.g., ketoconazole, miconazole, clotrimazole, fluconazole, etc.); Zidovudine; Skeletal muscle relaxants (tubocurarine); Rifabutin; Leukocyte transfusions. The adverse reactions most commonly observed are: fever; malaise; weight loss; hypotension; tachypnea; anorexia; nausea; vomiting; diarrhea; dyspepsia; cramping epigastric pain; normochromic, normocytic anemia; pain at the injection site with or without phlebitis or thrombophlebitis; generalized pain, including muscle and joint pains; headache; decreased renal function and renal function abnormalities.

Ferroheme is formed when iron is inserted into protoporphyrin IX. The active center of hemoglobin and myoglobin consists of iron Ferroheme complex bound through a single, “proximal”, axial histidine (His) to the protein It is an iron containing cofactor that is involved with a wide range of cellular functions including oxygen transport. The antimalarial activity of a number of artemisinin derivatives, both newly synthesized and currently used as drugs, against Plasmodium falciparum in culture shows a correlation with their affinity of binding with Ferroheme.

2-Amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP) is a mutagenic and carcinogenic heterocyclic amine formed during ordinary cooking, and is subsequently metabolically activated by cytochrome P4501A2 (CYP1A2) and N-acetyltransferase 2 (NAT2). PhIP has been used in trials studying the basic science of Pancreas Cancer.

Cytochalasin B is a cell-permeable alkaloid, isolated from a fungus Helminthosporium dematioideum. Cytochalasin B is an inhibitor of actin polymerization through binding to the fast-growing (barbed) end of F-actin filaments. Cytochalasin is used in studies of actin polymerization, cell division, and cell movement. The compound also inhibits glucose transporters GLUT1,3 and 4 and was investigated in a clinical trial to prevent restenosis after angioplasty surgery.

Echinocandin B is a naturally occurring antibiotic, isolated from Aspergillus nidulans. It acts as an inhibitor of fungal β-1,3-glucan synthase thereby disrupting the formation of the fungal cell wall. The drug itself was not developed in the clinic, but instead, it was used in the production of other echinocandin derivatives.