Leaked internal emails appear to show employees at one of the world's leading pharmaceutical companies calling for celebration" over price hikes of cancer drugs. After purchasing five different cancer drugs from British firm GlaxoSmithKline, [Aspen Pharmacare] tried to sell the medicines ... for up to 40 times their previous price. When bargaining over drug prices in Spain, the pharmaceutical giant is said to have threatened to stop selling the cancer treatments unless the health minister agreed to price rises of up to 4,000 per cent. Now another leaked email appears to reveal that staff at Aspen discussed destroying their supplies of the drug in the row. The price increases were made possible by a loophole that allows drug companies to change the price of medicines if they are no longer branded with the same name. The loophole is designed to make drugs cheaper once their patents have expired - but if drug companies have no competition, they are free to rise prices as well. A ruling by the Italian competition watchdog found Aspen had taken an "aggressive" approach to negotiations in the country. The company said it would stop supplying Italy with the drugs in October 2013 if authorities did not agree to price rises of up to 2,100 per cent in three months.