Marijuana-based products are displayed at the "Oregon's Finest" medical marijuana dispensary in Portland, Oregon April 8, 2014. Over 20 Oregon cities and counties are moving to temporarily ban medical marijuana dispensaries ahead of a May d
Marijuana-based products are displayed at the "Oregon's Finest" medical marijuana dispensary in Portland, Oregon April 8, 2014. Over 20 Oregon cities and counties are moving to temporarily ban medical marijuana dispensaries ahead of a May deadline, reflecting a divide between liberal Portland and more conservative rural areas wary about allowing medical weed. Portland, Oregon's largest city, already has a number of medical marijuana clinics and has not moved to ban them. Picture taken April 8, 2014. REUTERS/Steve Dipaola REUTERS/Steve Dipaola

Concerns over "production practices" had prompted Health Canada to issue a recall notice against a British Columbia supplier of medical marijuana. The specific pot is Purple Kush, Batch PK-10-20-13, manufactured by Greenleaf Medicinals that is based in Nanaimo.

"It's not a danger to those people using the product, but they are being asked to discontinue use," Erika-Kirsten Easton, Health Canada Spokesperson, told the Toronto Star. The agency found "issues with the company's production practices," Ms Easton said. She did not elaborate.

Read: Marijuana Less Harmful than Alcohol to Health and Society - American Survey

Greenleaf Medicinals has instructed clients to discontinue use of any marijuana that they may still have from this particular shipment. Moreover, as part of its commitment to clients, the company said it is presently working with other licensed producers to find a supply of marijuana for the impacted clients.

The recall is believed to be the first-ever announced by the federal health agency.

Possession and use of marijuana remains illegal in Canada unless authorized under the regulations with the support of a doctor or nurse practitioner.

"Producers of marijuana for medical purposes are subject to compliance and enforcement measures similar to those in place for other producers of controlled substances," Health Canada said in a statement. "They must meet strict security, control and reporting requirements, and they are regularly inspected."

Read: Casual Marijuana Smoking at Young Age May Cause Irreparable Brain Damage - Even at One Joint Per Week

The government in Ottawa has consistently opposed calls to decriminalise or legalise marijuana. However, a policy paper released by the British Columbia Liberals in 2013 said at least $7.5 billion annually could flow into the coffers of the Canadian government should it decide to legalise and decriminalise the use of marijuana in the country.