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Black cohosh
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May lower blood fat or blood pressure when taken with certain drugs. May increase the effect of tamoxifen. |
| Chamomile |
May increase bleeding when used with blood-thinners. May increase the effect of certain tranquilizers. |
| Dong quai |
May increase effects of warfarin (a blood-thinner). |
| Echinacea |
May interfere with therapy that uses the immune system to fight cancer. |
| Garlic |
May increase bleeding when used with aspirin,dipyridamole, and warfarin. May increase the effects of drugs that treat high blood sugar. |
| Ginkgo biloba |
May increase bleeding when used with aspirin, dipyridamole, and warfarin. May raise blood pressure when used with certain diuretics (drugs that cause the body to lose water through the kidneys). |
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Ginseng
|
May prevent the blood from clotting normally. May decrease blood sugar if taken with insulin. May interfere with drugs used to treat a mental disorder. May cause high blood pressure with long-term use of caffeine. |
| Kava kava |
May increase the effect of certain tranquilizers. May cause liver damage. |
|
St. John's wort
|
May cause life-threatening side effects when used with drugs that raise the level of serotonin in the brain, such as many antidepressants. May reduce the effect of certain drugs used for cancer, AIDS, organtransplants, heart disease, and birth control. |
| Ma huang (ephedra) |
May cause high blood pressure, increased heart rate, or death if used with beta-blockers (drugs used for high blood pressure and heart conditions), monoamine oxidase inhibitors (antidepressants), caffeine, and St. John’s wort. |
| Yohimbe |
Reduces the effect of St. John's wort and drugs for depression, high blood pressure, and high blood sugar. |
