Certain batches of three medicines for Parkinson's, epilepsy and blood clots are being recalled in the UK, and patients are being asked to arrange a new prescription via their GP.
The affected prescription-only medicines are Neupro, Vimpat and Clexane with a B & S Healthcare label, the UK's medicine regulator said.
The drugs may not have been stored correctly before reaching patients.
But the risk of the drugs not working properly is very low, it added.
The Medicines and Healthcare products Regulatory Agency (MHRA) said the recall was precautionary and patients should continue taking their medicine.
Once they have a new prescription, patients should then return the affected batches to their pharmacist.
The medicines are:
- Clexane 8000iu Injection 0.8ml
- Neupro 4mg/24 hr patches
- Vimpat 100mg tablets
There is no evidence that the medicines, which are in Italian packaging, were tampered with, en route from Italy to the UK.
More drugs recalled from pharmacies
A number of other medicines are being recalled from pharmacies as a precaution.
They include certain drugs for psoriasis, high cholesterol and chronic obstructive pulmonary disease – also listed online by the MHRA.
Pharmacies are being asked to check for affected packs in B & S Healthcare labelling, and return them to their supplier.