(Reuters) - Britain's Reckitt Benckiser will pay up to $1.4 billion (£1.1 billion) to resolve all U.S. federal investigations into the sales and marketing of an opioid addiction treatment by its former prescription pharmaceuticals business Indivior . The settlement means the British consumer goods giant will have to raise the amount of money it has set aside to cover the cost of the investigations to $1.5 billion, from an earlier provision of $400 million, the company said on Thursday. Reckitt..