A police investigation has begun after prescription pills were found among Jelly Tots on a Nestle production line.
Officers were called to the plant in Fawdon, Newcastle, last week after the tablets were discovered by staff.
The food giant stressed there was no risk to the public.
According to reports the discovery was made in a hopper of sweets and Nestle has confirmed they were found prior to packaging.
A spokesman said: "We can confirm that there was an incident at our factory in Fawdon, Newcastle, last week.
"The incident was immediately contained, the police were asked to investigate and we are working with them.
"It would not be appropriate for us to make any further comment until they have completed their investigation.
"The incident involved the discovery, in product prior to packing, of a standard prescription tablet, commonly prescribed to both adults and children.
"We can confirm that, due to our rigorous quality procedures and immediate action, the incident was isolated and contained within our control.
"Our consumers and customers can be assured that all our products are completely safe."
The company has not ordered a product recall as it was sure there was no contamination of sweets.
More than 400 people work at the Fawdon site which also manufactures popular brands such as Fruit Pastilles, Rolos and Drifters.
Related stories on AOL:
Dishwasher recall over fire concerns
Peugeot recall over airbag fears
Argos recalls mattress after fire risk