Ottawa police have charged a pharmacist with fraud and drug trafficking after they investigated a claim of an armed robbery last October.

Police said they were called on Oct. 26 to a pharmacy on the 500 block of Rideau St. after a report a lone male suspect entered with a knife and demanded prescription drugs. The suspect had allegedly fled with a large quantity of prescription drugs.

But after investigating, police charged the complainant, a 44-year-old man from Ottawa, with trafficking a schedule one substance, fraud exceeding $5,000, conspiracy to commit an indictable offence and public mischief.

Police say the Ontario College of Pharmacists assisted with the investigation.

Staff Sgt. Michael Haarbosch of the robbery unit said investigators believe someone did come into the pharmacy with a knife, but that the complainant's version of events were "not completely credible."

Haarbosch said the accused had an accomplice, but that they do not expect to lay further charges.

In a statement earlier police take reports of armed robbery seriously.

"When versions of events in a robbery as reported to the police turn out to be not completely credible, we will pursue the matter with equal vigour," said Haarbosch.