India, Sept. 26 -- The stock of Sun Pharmaceautical Industries Ltd. fell on Friday after US President Donald Trump imposed 100% tariff on branded pharma.

The share price of India's largest drugmaker fell as much as 4.96% to Rs.1,547.25 at the opening bell, even as Nfity Pharma declined 2.3% with all its constituents in the red.

US President Donald Trump has announced a fresh round of tariffs, including a 100% duty on branded or patented pharmaceuticals starting 1 October, unless a company is building a manufacturing plant in America.

No levies will be applied to pharmaceutical imports if companies have broken ground on a US manufacturing plant, or if such a plant is under construction, Trump posted on social media Thursday.

"Starting ...