Link: http://www.hc-sc.gc.ca/ahc-asc/media/advisories-avis/_2010/2010_16-eng.php

Advisory
2010-16
January 29, 2010
For immediate release

OTTAWA - Health Canada is advising Canadians that natural health products containing the ingredient glucomannan in tablet, capsule or powder form, which are currently on the Canadian market, have a potential for harm if taken without at least 8 ounces of water or other fluid. The risk to Canadians includes choking and/or blockage of the throat, esophagus or intestine, according to international adverse reaction case reports. It is also important to note that these products should NOT be taken immediately before going to bed.

Health Canada has authorized some products containing glucomannan for the purposes of appetite reduction, weight management, treatment of constipation, management of cholesterol levels.

This advisory comes in light of Health Canada's action to work with manufacturers and distributors of products containing glucomannan to help ensure that these products are labelled appropriately with complete directions of use and cautionary statements. Should new safety information become available, Health Canada will provide an update to Canadians.

Follow up:

The required label information is as follows:

Directions for Use
Take (or mix) this product with at least 8 ounces (a full glass) of water or other fluid. Taking this product with insufficient liquid may result in choking and/or blockage of the throat, esophagus or intestine. Do not take immediately before going to bed.

Cautions and Warnings
Consult a healthcare practitioner prior to use if you are pregnant or breastfeeding.
Consult a healthcare practitioner prior to use if you have diabetes.

Contraindication
Do not use this product if you have difficulty swallowing.

Known Adverse Reaction
If you experience chest pain, vomiting, or difficulty in swallowing or breathing after taking this product, seek immediate medical attention.

Consumers should consult with their health care practitioner if they still have any questions or concerns.