Enlarge (credit: Franck Fife/AFP/Getty Images) US pharma giant Pfizer and a partnering distributor have been slapped with a record fine for hiking UK drug prices by 2,600% overnight. In September 2012, the amount the National Health Service (NHS) was charged for 100mg packs of anti-epilepsy drug phenytoin sodium went from £2.83 to £67.50 ($3.56 to $84.98), according to the UK's Competition and Markets Authority (CMA).