GlaxoSmithKline lose patent battle

Pharmaceuticals giant GlaxoSmithKline today said it had lost a key court case in the US over the patent to its anti-depressant Paxil.

Shares fell 3% after the group said that a court in Chicago had ruled that a subsidiary of rival drugs group Apotex did not infringe GlaxoSmithKline’s patent with a similar product.