If you’re using the anticlotting drug warfarin, tell your doctor about any herbal or dietary supplements you may be taking.
That’s the strong advice of researchers who say that nine of the 10 top-selling supplements can change the effectiveness of warfarin, potentially causing a dangerous bleed, a deadly blood clot, or even a stroke.
In a survey, nearly three-fourths of 100 people on warfarin reported they used over-the-counter multivitamins or other supplements, yet supplement use was not documented on the medical charts of nearly 70% of them, says Jennifer Strohecker, PharmD, a clinical pharmacist at Intermountain Healthcare in Salt Lake City.
Previous research has shown that fewer than one in three people tell their doctor about dietary supplement use, she tells WebMD.
Biosingularity 