The Food and Drug Administration is advising consumers not to purchase prescription drugs from Web sites that have their orders filled from Canadian companies reportedly selling counterfeit medications.

The FDA is investigating reports that Mediplan Prescription Plus Pharmacy or Mediplan Global Health in Manitoba, Canada sold fake drugs to U.S. consumers.

It is coordinating its efforts with international law enforcement authorities

The Food and Drug Administration approves Actonel (risedronate sodium) for the treatment of osteoporosis in men.

Its manufacturers, Proctor and Gamble Pharmaceuticals and Sanofi-Aventis, say the drug is already commonly prescribed for the soft-bones condition in post-menopausal women