Efaproxiral is an analog of the cholesterol drug bezafibrate

Bezafibrate

Bezafibrate is a fibrate drug used for the treatment of hyperlipidaemia. It helps to lower LDL cholesterol and triglyceride in the blood, and increase HDL.-Mode of action:...

 developed as a radio sensitizer. It is used to increase the efficacy of certain chemotherapy

Chemotherapy

Chemotherapy is the treatment of cancer with an antineoplastic drug or with a combination of such drugs into a standardized treatment regimen....

 drugs which have reduced efficacy against hypoxic

Hypoxia (medical)

Hypoxia, or hypoxiation, is a pathological condition in which the body as a whole or a region of the body is deprived of adequate oxygen supply. Variations in arterial oxygen concentrations can be part of the normal physiology, for example, during strenuous physical exercise...

 (oxygen-poor) tumours, and can thus be made more effective by increasing oxygenation of the tumour tissues. However this increased oxygenation of tissues could theoretically also produce enhanced exercise capacity for 2-3 hours post intravenous infusion, which has led World Anti-Doping Agency

World Anti-Doping Agency

The World Anti-Doping Agency , , is an independent foundation created through a collective initiative led by the International Olympic Committee . It was set up on November 10, 1999 in Lausanne, Switzerland, as a result of what was called the "Declaration of Lausanne", to promote, coordinate and...

to categorize efaproxiral under a prohibited method to artificially enhance oxygen transfer.