PICKERING, Ont. -- Two people are facing charges after allegedly fraudulent prescriptions were used to obtain fentanyl from a pharmacy east of Toronto.

Durham regional police say a man went to a Pickering, Ont., pharmacy last Sunday with a prescription for 30 fentanyl patches, and paid for 10 patches.

The pharmacy alerted police and when the man returned a few days later for the remaining patches, he was arrested and charged.

While investigating the incident, officers learned that a woman had filled an allegedly fraudulent prescription for five fentanyl patches on Jan. 7, and returned for 10 patches a few days later.

She was arrested at her home and charged.

A 48-year-old man and a 50-year-old woman -- both of Pickering -- are charged with fraud under $5,000 and uttering a forged document.