Indivior shares plunge at the start of £1bn opioid claims lawsuit

Former parent company Reckitt Benckiser sues firm over marketing of its Suboxone Film drug

Shares in Indivior plunged on Friday after the pharmaceuticals firm revealed it had been hit by the beginnings of a 1bn opioid legal claim, which is worth more than the entire value of the drugmaker.

The move, brought to the high court by Indivior's former parent company Reckitt Benckiser (RB), relates to the smaller company's marketing of its Suboxone Film drug, which became embroiled last year in the US opioid crisis when a string of companies were accused of aggressive sales tactics which led to addiction and death.