Health Canada is advising consumers not to use nine foreign products because of concerns about possible side effects.

The products are not authorized for sale in the country and have not been found in the Canadian marketplace, the health regulator said in an alert Monday.

However, it's possible the products could be purchased by Canadians travelling abroad or that they have been brought into the country through online purchases.

Canadians who have these products are advised not to use them and should consult a health care professional if they have concerns about their health relating to their use, Health Canada said.

The foreign products are:

· Dan Bai Shou Shen Su was found to contain undeclared thyroid hormones and sibutramine.
· Karntien and Karntien Easy to Slim were adulterated with sibutramine and a compound that is similar in structure to sibutramine (N-desmethylsibutramine).
· Armstrong Natural Herbal Supplement, Enhanix New Extra Men's Formula, Power 58 Extra, and Platinum Power 58 Extra were adulterated with tadalafil or unapproved substances with structures similar to tadalafil and vardenafil.
· More Slim was found to contain the undeclared pharmaceutical ingredient sibutramine.
· Soloslim was found to contain an undeclared substance similar in structure to the prescription drug sibutramine. It also contains the prescription drug L-carnitine, as well as synephrine, which is not authorized for sale in weight loss products in Canada.

Sibutramine is a prescription drug used to treat obesity. L-carnitine is used in the treatment of carnitine deficiency. Tadalafil and vardenafil are prescription drugs used to treat erectile dysfunction.

These drugs should only be used under the supervision of a health care professional.

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