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Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in this Registration Statement on Form S-8 of Indivior PLC of our report dated March 9, 2023 relating to the financial statements, which appears in Indivior PLC's Registration Statement on Form 20-F (No. 001-37835).

/s/ PricewaterhouseCoopers LLP

Richmond, Virginia

June 12, 2023