About 50.9 million items of aspirin were prescribed in the UK between January and October last, the NPA said, making it one of the most commonly prescribed drugs in the country.
Patients needing a regular supply include those with a history of strokes, heart disease, chronic kidney disease and diabetes.
“Suppliers have said that they are having difficulty in manufacturing, it could be due to a difficulty in obtaining raw materials from Europe but we haven’t been told the specifics but we know there is certainly an issue around getting supplies into the UK,” Kolia told BBC Hereford and Worcester.
He added: “We had this problem last year with penicillin, it’s an ongoing issue but it’s worsening. We’ve just been informed that another anti-coagulation medication, apixaban, is now going out of stock.”