On 18 February 2022 it was announced that Ujah and his teammates Zharnel Hughes, Nethaneel Mitchell-Blake and Richard Kilty would be stripped of their 4 × 100 metres relay 2020 Summer Olympics silver medals after Court of Arbitration for Sport found Ujah guilty of a doping violation.

[7] At the 2016 Summer Olympics from Rio de Janeiro, he failed to make the final of the 100 metres by 0.01 seconds.

He ran the first leg in the 4 × 100 metres relay for Great Britain, the gold medal winning team at the 2017 World Championships in London on 12 August.

[10] On 18 February 2022, having not appealed the findings of the test, the British relay team had their medals officially stripped.

Despite the ban, Ujah was cleared of intentionally taking prohibited drugs by the AIU and the World Anti-Doping Agency.