‘They thought I had cancer’: painkiller banned in UK linked to Britons’ deaths in Spain

Patients' group says reactions to metamizole can cause sepsis and organ failure - and British and Irish people are at higher risk

A patients group representing several British victims has launched legal action against the Spanish government over claims it failed to safeguard people against the potentially fatal side effects of one of the country's most popular painkillers, involved in a series of serious illnesses and deaths.

The drug metamizole, commonly sold in Spain under the brand name Nolotil, is banned in several countries, including Britain, the US, India and Australia. It can cause a condition known as agranulocytosis, which reduces white blood cells, increasing the risk of potentially fatal infection.