Goldenseal is considered safe for short-term use by adults at recommended dosages. Berberine, a chemical found in goldenseal, may cause abdominal swelling or pain, bitter taste, constipation, diarrhea, gas, headache, nausea, and vomiting.
Goldenseal may cause changes in the way the body processes drugs, and could potentially alter the effects of many drugs. It is also known to interact with the following:
- anticoagulants (e.g., apixaban, warfarin)
- antiplatelets (e.g., acetylsalicylic acid (ASA), clopidogrel)
- blood pressure medications (e.g., amlodipine, ramipril)
- dextromethorphan
- diabetes medications (e.g., metformin, sitagliptin)
- digoxin
- losartan
- medications that may cause sedation (e.g., alcohol, antidepressants, benzodiazepines, narcotics)
- pentobarbital
- tacrolimus
Women who are pregnant or breast-feeding should avoid using goldenseal. Berberine, a chemical in goldenseal, can cause or worsen jaundice in newborns and could lead to a life-threatening problem called kernicterus.
As goldenseal can increase your risk of bleeding, it should be used cautiously by people with bleeding disorders. Stop taking goldenseal at least 2 weeks before surgery.
Goldenseal should not be given to infants or young children.
Before taking any new medications, including natural health products, speak to your physician, pharmacist, or other health care provider. Tell your health care provider about any natural health products you may be taking.