Supplements, medicine can be dangerous mix

Taking vitamins or other dietary supplements along with medication can be dangerous, the U.S. Food and Drug Administration (FDA) warns.

Dietary supplements can alter the absorption and metabolism of prescription and over-the-counter medications. Some may increase the effect of medication, and other may decrease it, the FDA explained in an agency news release.

For example, the supplement St. John's Wort (herbal used to treat depression) can make birth control pills less effective, the FDA reported. Both the herbal supplement ginkgo biloba and vitamin E can thin blood. Mixing either supplement with the prescription blood thinner warfarin or aspirin could increase the risk of internal bleeding or stroke, the report said.

Dietary supplements are widely used around the world. Although many people take supplements to make sure they get proper nutrition, the FDA said there is no substitute for eating a healthy diet, and products labeled as "natural" or "herbal" are not necessarily harmless. This is particularly true for children. Because children's metabolisms are so unique that at different ages they metabolise substances at different rates.

The FDA added the following tips for consumers:

• Every time you visit the doctor, bring a list of all the dietary supplements and medications you take. This list should include dosages and frequency.
• Tell your doctor if your health has changed, including any recent illnesses, surgeries or other procedures. You should also tell your doctor if you are pregnant or breast-feeding.