The US president urged pregnant women to ‘fight like hell’ to avoid taking paracetamol - Kevin Lamarque/ReutersMore than £4.1bn has been wiped off the value of Britain’s biggest drugmakers after Donald Trump linked paracetamol to autism. The sector dropped by as much as 1.5pc as medical experts criticised the comments, in which Mr Trump urged pregnant women to “fight like hell” to avoid taking paracetamol. This came after Mr Trump linked the company’s Tylenol brand of paracetamol to autism. In his speech on Monday, Mr Trump also repeated heavily debunked claims linking vaccines to autism. Wes Streeting, the Health Secretary, urged households to pay no attention to Mr Trump’s medical advice.