Some medicines manufacturers had raised concerns that not all suppliers would have their labelling ready but the government is not anticipating disruption.
A spokesperson said the move resolved supply issues created by the Northern Ireland Protocol.
“The Windsor Framework secures the long-term stability of medicines supply to Northern Ireland, ensuring that medicines can be licensed UK-wide and supplied in the same packaging across the UK,” they added.
The supply of medicines from Great Britain to Northern Ireland has been one of the most complex post-Brexit issues and the original agreement reached in 2019 was amended several times.
The Windsor Framework, which was agreed in 2023, external, sought to deal with the issue once and for all.
It included an agreement that manufacturers could produce a single medicines pack for the whole of the UK, including Northern Ireland.
More elements of the Windsor Framework are expected to be implemented in 2025.
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