Manufacturer Grünenthal Limited is recalling five batches of Recivit sublingual tablets over concerns they could contain empty blisters.

There was a possibility that manufacturing issues had resulted in blisters either missing a tablet, which contains fentanyl citrate, or containing two tablets in a single blister cavity, the MHRA said on Tuesday (November 18).

The medicines watchdog understood that a "very small number" of packs from the affected batches had been distributed to the UK market, it said.

For stock enquiries, contact UDG customer service on 01773 515 171.

For medical enquiries, call Grünenthal's medical information line on 08703 518 960 or email [email protected].

The affected batches are: