US President Donald Trump will slug branded pharmaceuticals with a 100 per cent tariff if manufacturers do not have an American manufacturing plant under construction by Wednesday, in a move that threatens Australia’s $2 billion of exports in the industry.

Trump announced this fresh round of tariffs on social media platform Truth Social, giving manufacturers a deadline of five days to start building plants to escape the extra costs.

“Starting October 1st, 2025, we will be imposing a 100% Tariff on any branded or patented Pharmaceutical Product, unless a Company IS BUILDING their Pharmaceutical Manufacturing Plant in America. ‘IS BUILDING’ will be defined as, ‘breaking ground’ and/or “‘under construction’. There will, therefore, be no Tariff on these Pharmaceutical Products if constructio

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