Health Canada says it will review a declaration by American government experts who say a key ingredient in over-the-counter cold and allergy medications also available in this country does not work to get rid of nasal and sinus congestion.
Advisers to the U.S. Food and Drug Administration voted unanimously this week against the effectiveness oforally administered decongestantphenylephrine, found in medicationssuch as Sudafed and DayQuil.
Phenylephrine became a common ingredient in cold and allergy medicines after a 2006 U.S. law banned over-the-counter sales of products that contain another type of decongestant called pseudoephedrine, which, in large quantities, can be used to make methamphetamine.Health Canada said Friday that, following a review, it will take any necessary action to ensure Canadians have access to safe and effective products.
Mina Tadrous, an assistant professor of pharmacy at the University of Toronto, said the advisers believe the oral phenylephrine products may be ineffective because they are metabolized too quickly in the liver. He said phenylephrine is an example of a medication that was approved in the late 1960s with "slight evidence" that it may work as a decongestant.The FDA said in a statement this week that its advisory committee did not raise any concerns about safety issues with the use of oral phenylephrine at the recommended dose.
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