All-Grass of Diluteyellow Crotalaria — Safety & Interactions

Huang Hua Di Ding · Herba Crotalariae Albidae

Contraindications

  • Pre-existing liver disease or elevated liver enzymes — pyrrolizidine alkaloids are directly hepatotoxic
  • Pregnancy — pyrrolizidine alkaloids are fetotoxic; contraindicated throughout all trimesters
  • Paediatric use — immature hepatic metabolism increases PA toxicity risk
  • Concurrent hepatotoxic drug therapy — additive liver damage risk

Cautions

  • Limit duration of use; pyrrolizidine alkaloids accumulate and cause cumulative hepatotoxicity
  • Use with caution in renal impairment — nephrotoxic potential reported for pyrrolizidine class
  • Monitor for signs of pulmonary hypertension with extended use; monocrotaline-type PAs implicated in vascular toxicity
  • Cool thermal nature — use cautiously in cold-deficiency patterns, chronic diarrhea, or poor digestion

Drug Interactions

Drug Class / Substrate Mechanism Severity Source
CYP3A4 and CYP2A6 substrates and inhibitors Pyrrolizidine alkaloids are metabolised via CYP3A4 and CYP2A6 to hepatotoxic pyrrole intermediates; CYP inhibitors may reduce detoxification and increase toxicity; CYP inducers may accelerate formation of toxic pyrroles High PMC6032134 — Pyrrolizidine Alkaloids: Chemistry, Pharmacology, Toxicology and Food Safety
Hepatotoxic drugs (methotrexate, isoniazid, valproate, statins) Additive hepatotoxic effect; simultaneous use of PA-containing herbs and hepatotoxic pharmaceuticals significantly raises risk of sinusoidal obstruction syndrome (SOS/VOD) High PMC8508847 — Metabolic Toxification of 1,2-Unsaturated Pyrrolizidine Alkaloids Causes Human Hepatic Sinusoidal Obstruction Syndrome

Pregnancy

Not recommended during pregnancy. Consult a qualified practitioner before any use.

This information is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider before using herbal medicines, especially if you take prescription medications.