The US president had put pressure on the pharmaceutical industry to make drugs cheaper for Americans

The price of the weight loss jab Mounjaro will rise by up to 170% in the UK, its US manufacturer has said, as Donald Trump ramps up pressure on drugmakers to increase their prices for Europeans so that they can make them more affordable for Americans.

Eli Lilly has said it will increase the price of the drug from September, with a month’s supply of the highest dose rising from £122 to £330.

Mounjaro contains tirzepatide and is self-administered in weekly injections.

When it was launched in Britain in February 2024, Eli Lilly agreed to a list price “significantly below” its other European markets to stop delays in availability of the medicine through the NHS.