Goldenseal
hydrastis canadensis
Medicinal Actions
Alterative, Amebicide, Analgesic, Antiacetylcholinesterase, Antibacterial, Antialzheimeran, Antiarthritic, Anticancer, Anticariogenic, Anticonvulsant, Antihelicobacter, Antiinflammatory, Antimitotic, Antiperiodic, Antiperistaltic, Antipyretic, Antisecretory, Antiseptic, Antitrypanosomic, Antitussive, Antiulcer, Astringent, Bilirubinolytic, Cardiotonic, Choleretic, Deliriant, Depurative, Detergent, Digestive, Diuretic, Emetic, Emmenagogue, Fungicide, Hepatotonic, Hypertensive, Hypoglycemic, Hypotensive, Immunostimulant, Laxative, Myostimulant, Oxytocic, Protisticide, Secretagogue, Sedative, Sialagogue, Stomachic, Tonic, Trophorestorative, Uterotonic, Vibriocide
Primary Conditions Treated
General Dosage
0.5–1.2 g root; 0.5–1 g root, or in tea, 3 ×/day; 1 g root, maximum 4.9 g/day; 4–6 g root/day; 150–350 mg root 3 ×/day; 1–2 tbsp fresh root; 1.5–3 g dry root; 2 g dry root:10 ml alcohol/10 ml water; 500 mg dry root/day; 0.5–1 tsp powdered root/cup water; 0.3–1 ml liquid root extract; 2–4 ml root tincture; 2–4 ml root tincture/day; 2–4 ml tincture; 1 dropper tincture 3 ×/day; 15–40 drops fluid extract several ×/day; 1–4 g fluid extract/day; 4–6 ml liquid extract; 50–150 mg hydrastine-chlorate; 1–2 capsules 3 ×/day; 1 StX 2–3 ×/day. 0.5–1.2 g root; 0.5–1 g root, or in tea, 3 ×/day; 1 g root, maximum 4.9 g/day; 4–6 g root/day; 150–350 mg root 3 ×/day; 1–2 tbsp fresh root; 1.5–3 g dry root; 2 g dry root:10 ml alcohol/10 ml water; 500 mg dry root/day; 0.5–1 tsp powdered root/cup water; 0.3–1 ml liquid root extract; 2–4 ml root tincture; 2–4 ml root tincture/day; 2–4 ml tincture; 1 dropper tincture 3 ×/day; 15–40 drops fluid extract several ×/day; 1–4 g fluid extract/day; 4–6 ml liquid extract; 50–150 mg hydrastine-chlorate; 1–2 capsules 3 ×/day; 1 StX 2–3 ×/day.
Safety & Contraindications
Class 2b. Fresh plant may irritate the mucosa. Not approved. “Goldenseal should not be taken for long periods of time”. The LRNP is a bit stronger, saying large doses of the plant may irritate the mouth and throat, and cause diarrhea, nausea, parasthesia, and vomiting. “CNS stimulation and respiratory failure induced by the plant can be fatal.” In higher doses hydrastine can cause convulsions, exaggerated reflexes, high blood pressure, and death from respiratory failure. No recent reports of toxicity in the literature. May alter intestinal flora. Canadian regulations do not allow it as an ingredient in oral products. Contraindicated in glucose-6-phosphate-dehydrogenase deficiency. Berberine may antagonize heparin’s anticoagulant activity. The PDR last couplet in the PDR general warning may stimulate more sales, “If taken over an extended period, the drug can bring about digestive disorders, mucous membrane irritation, constipation, excitatory states, hallucinations, and occasional deliria”. The potentially poisonous berberine may cause gastric upset. Because of alkaloids with uterine stimulant activity, in vitro, its use in pregnancy and lactation is to be avoided. Berberine is reportedly mutagenic in yeast cells and Ames test. PH2 assigns the toxicity more to hydrastine than to berberine, perhaps making barberry and oregon grape look like safer alternatives, with the benefit of the MDR-inhibitor methoxyhydnocarpine. “The hydrastine component appears to be the toxic component in goldenseal”. Overdoses may induce bradycardia, central paralysis, and dyspnea. Death from berberine has been reported.