Pharmacologists looked at  2400 drugs to see if any of them could stop cell multiplication in tumours and hence stop their fast growth. Itraconazole,first synthesised in 1980, was found by the researchers at Johns Hopkins University in the USA to have the ability to starve tumour cells of their ability to grow new blood cells. Itraconazole is used in foot anti fungal products especially those for onychomycosis. Other similar experiments found that Zinc Pyrithione (also anti-fungal and anti-bacterial) which is an ingredient of anti dandruff shampoos could keep open defective cell gateways within the brain and allow potassium, a nerve calmer to have an improved flow.