A man and woman have been arrested in connection with the theft of fentanyl and other prescription drugs from a Swan River pharmacy.

A 32-year-old woman and 34-year-old man are in custody while charges are being finalized, police said.

They were arrested just before 6 p.m. Thursday at home on Centennial Drive in Swan River.

The drugs had been stolen during a break-in the previous night.

Investigators said they are confident the majority of the stolen items have been recovered.

"The quick recovery of potentially lethal prescription drugs was the outmost priority for our officers," RCMP spokesman Sgt. Bert Paquet stated in a news release.

Fentanyl is estimated to be up to 100 times more potent than morphine and hundreds of times more powerful than heroin — and potentially lethal when mixed with other drugs.

In January, the Manitoba government created a fentanyl task force to help raise awareness of the dangers posed by the powerful synthetic opioid.