Exhibit 5.2

21 November 2022

Securities and Exchange Commission

100 F Street, N.E.

Washington, DC 20549

Commissioners:

We have read the statements made by Indivior PLC (copy attached). We understand Indivior PLC’s statements will be included under Item 16F of its Registration Statement on Form 20-F, which will be filed with the Securities and Exchange Commission on 22 November 2022. We agree with the statements concerning our Firm contained therein.

Very truly yours,

/s/ PricewaterhouseCoopers LLP

PricewaterhouseCoopers LLP

London, United Kingdom

PricewaterhouseCoopers LLP, 1 Embankment Place, London, WC2N 6RH

T: +44 (0) 2075 835 000, F: +44 (0) 2072 124 652, www.pwc.co.uk

PricewaterhouseCoopers LLP is a limited liability partnership registered in England with registered number OC303525. The registered office of

PricewaterhouseCoopers LLP is 1 Embankment Place, London WC2N 6RH. PricewaterhouseCoopers LLP is authorised and regulated by the Financial Conduct Authority for designated investment business.