Pharmacists must stop supplying certain packs of blood pressure medication Lercanidipine HCI tablets (lercanidipine hydrochloride) after a dose labelling error was found in one batch.

And they must return any packs from batch MD4L07, with an expiry date of 01/2028, to the supplier.

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This batch of 20mg tablets was incorrectly labelled as 10mg on some sides of the box.

However, the packs from this batch contain 20mg tablets. The correct strength (20mg) is printed on the top of the carton and on the blister strips, the Medicines and Healthcare Regulatory Agency (MHRA) has said.

Patients taking the blood pressure medication must check whether the dose on their medicine's box matches the one on the foil blister pack.

And they 'should contact their pharmacist or GP immediately' if they are affected, the MHRA said.

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It added that if a patient prescribed a 10mg dose affected by the error cannot speak to a healthcare professional before they are due to take their next dose, they should verify the strength of the tablets is 20mg from the information on the foil of the blister strips, and take half of one tablet as a 10mg dose until they can speak to their pharmacist or doctor.

'Patients who were prescribed 20mg tablets should verify the strength of the tablets by checking the information on the foil of the blister strips prior to taking the tablet. Patients should continue to take the tablets as prescribed by their doctor, the MHRA added.

It also told patients to speak to their dispensing pharmacist if they were worried about what they had received, and to speak to a pharmacist or doctor or call NHS 111 if they thought they might have taken too high a dose.

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Dr Alison Cave, MHRA chief safety officer said: 'Patient safety is our top priority. We ask patients to check their medicine packaging and follow our advice.

'Healthcare professionals such as pharmacists are also being asked to stop supplying medicine from the affected batch and to return it to the supplier.'