It is believed to have talked to several US companies, including Pfizer and Bristol-Myers Squibb, about the possibility of a combined approach to the giant American market.
However, Glaxo has no plans to form any global alliances. A spokesman yesterday dismissed as 'pure speculation' any idea of a worldwide move and pointed out that all drug companies in the US were talking to each other about synergistic links.
Glaxo's interim results are due on Thursday.
Analysts expect a strong profit performance, with pre-tax profits in the six months to December likely to rise by about 15 per cent to pounds 950m.Reuse content