Brentford-based Glaxo has been embroiled in controversy before over its Seroxat treatment, also known as Paxil. Glaxo was fined three billion US dollars (£2 billion) last summer in the biggest healthcare fraud in US history after it admitted paying medics to prescribe the drug for children although it was not intended for under 18s, while it also pushed its Wellbutrin drug for uses for which it was not approved. Glaxo denied the allegations and said it acted lawfully.