Bitter Apricot Kernel — Safety & Interactions
Xing Ren · Semen Armeniacae
Use with caution. Practitioner review recommended before use.
Contraindications
- Yin Deficiency cough with dry throat and scanty sputum — the slightly warm, bitter-drying nature is less appropriate than moistening Lung herbs (Bei Sha Shen, Bai He) for pure Yin Deficiency Dryness
- Diarrhea and loose stools — lubricating action worsens Deficiency Cold diarrhea
Cautions
- Standard dose: 3–9 g dried kernel in decoction (boiled ≥20 minutes); ~10 kernels; ALWAYS cook — raw consumption significantly raises HCN exposure
- AMYGDALIN TOXICITY: raw bitter apricot kernels contain 0.5–3 mg HCN equivalent per kernel; 20 raw kernels can cause HCN poisoning in children; symptoms: nausea, vomiting, headache, dizziness, dyspnea, convulsions; antidote: IV hydroxocobalamin + sodium thiosulfate
- Distinguish from sweet apricot kernel (Tian Xing Ren / Nan Xing Ren) — the sweet variety (confectionery almond substitute) has 100-fold less amygdalin; some Chinese stores label sweet kernels as 'apricot kernel'; bitter variety for TCM, sweet for food
- Children: especially vulnerable to amygdalin poisoning; keep raw kernels away from children
Drug Interactions
| Drug Class / Substrate | Mechanism | Severity | Source |
|---|---|---|---|
| ACE inhibitors (enalapril, ramipril, lisinopril) — ACE inhibitor cough is a bradykinin-mediated adverse effect; Xing Ren's antitussive mechanism does not address this cause; clinical evidence does not support Xing Ren for ACE inhibitor cough; use may mask the indication to switch antihypertensive class | |||
| Opioid antitussives and respiratory depressants (codeine, morphine, benzodiazepines) — additive respiratory depression risk at supraTherapeutic Xing Ren doses via amygdalin → HCN respiratory suppression pathway | |||
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.