The case of the fizzing pain killers is heading for the High Court. Sanofi Winthrop, which manufactures Panadol Soluble tablets, is suing Brunner Mond & Co, of Northwich, Cheshire, for £348,000. It claims that a batch of anhydrous sodium carbonate supplied by Brunners failed to work in the way intended with the result that the Panadol tablets effervesced in their packets. When the case gets to court the company will accuse Brunners of breach of contract.