Huyền sâm và công dụng chữa bệnhHuyền sâm là rễ phơi hay sấy khô của cây bắc huyền sâm. Huyền sâm có vị đắng, ngọt hơi mặn, tính hơi lạnh, có tác dụng giải độc, nhuận tràng, giải khát…
Hoa huyền sâmChữa phát ban, đau họng: huyền sâm, cam thảo, thăng ma, mỗi vị 20 gr. Đổ 600 ml nước, sắc còn 200 ml, uống ấm sau bữa ăn 30 phút. Chữa ban chẩn, sốt cao mê sảng: huyền sâm 12 gr, kim ngân hoa 12 gr, mạch môn 12 gr, tê giác 12 gr, sinh địa 20 gr, hoàng liên 6 gr; liên kiều, đan sâm, đọt tre, mỗi vị 8 gr. Tất cả các vị trên cho vào nồi, đổ 600 ml nước, sắc còn 200 ml, chia làm 3 lần uống trong ngày.
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