Xiong Huang (雄黄; Xióng Huáng; Latin: Realgar; English: realgar) is the sulfide mineral realgar, mainly arsenic disulfide (As₂S₂). In Chinese medicine it resolves toxin and kills parasites. It is acrid and warm, toxic, enters the Liver and Large Intestine channels, and its core actions are to resolve toxin and kill parasites, dry dampness and dispel phlegm, and check malaria. It is used mostly externally. Internal use is in pills and powders only. The usual amount is 0.05–0.1 g. Use internal doses with caution. Do not use it long. Contraindicated in pregnancy.
Heating or calcining sharply increases toxicity. Do not heat or calcine it yourself. It is not Ci Huang. Orpiment is a different arsenic sulfide. Use and safety margin differ. Decorative mineral and realgar wine are not the decoction piece. Snake or insect bite, fright-epilepsy, and malaria need a clinic first. External use should not cover a large area or go on for a long time. Children should not meet it without a practitioner.
It is used most often for three patterns:
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Abscesses, boils, snake and insect bite — snakebite needs emergency care
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Parasite accumulation with abdominal pain — seek care
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Fright-epilepsy, malaria — seek care
Acrid, warm, and toxic, it is not a daily “toxin realgar” to take internally or apply for a long time. Using it when there is no toxin can poison. Vomiting, abdominal pain, or jaundice: stop and get medical care.
When heat-toxin forms sores, or parasites accumulate, local swelling and abdominal pain are common. Xiong Huang is acrid, warm, and toxic. It resolves and kills parasites, which is why it appears in external toxin-resolving formulas. It is more drying and toxic than it is supporting. Yin and blood deficiency, and pregnancy, are absolute stop signs.
Xiong Huang is not a catch-all toxin or parasite mineral. Internal use outside a practitioner’s control, long use, calcining, or use in pregnancy is not appropriate. External use or a place in pills and powders should be decided by a licensed Chinese medicine practitioner after pattern diagnosis, using a qualified product.