Pharmaceutical USA-based Amylin Pharmaceuticals saw its shares fall nearly 4% to $17.10 yesterday morning, after it revealed new clinical data showing that, while its new type 2 diabetes drug candidate Bydureon, an extended-release injectable version of already marketed Byetta (exenatide) beat one comparator drug, it was little better than two others, one of which was the now generic metformin. 16 June 2010