(Reuters) -Global drugmakers are scrambling to shore up their U.S. manufacturing capacity and domestic inventory as the Trump administration moves ahead with a 100% tariff on imported branded and patented drugs, starting October 1. The sweeping measure has triggered a flurry of activity across the industry, including fast-tracking U.S. manufacturing projects, price cuts and direct-to-consumer sales. Here's what drugmakers are doing to mitigate supply-chain risks and reassure investors: Pfizer Pfizer re ...