Grape seed extract may enhance the effects of anti-inflammatory medications
and cholesterol-lowering medications. Therefore, consult with your health care
professional before taking grape seed extract along with such medications.
There have been reports of a possible decrease in the effectiveness of
antibiotics, specifically tetracycline and tetracycline-derivatives like
doxycycline. If you are currently taking any of these antibiotics, you should
not use this herb.
