Source 出处 · Taiping Huimin Hejiju Fang · Doses are not given here: they are set by a licensed practitioner for the individual.
Safety. Chuan Xiong Cha Tiao San is recorded in Taiping Huimin Hejiju Fang, the Song-dynasty official formulary, and its name carries a piece of instruction that most formula names do not: it is to be taken with tea. The tea is not merely a vehicle. In the classical reading, tea is cooling and descends, and it is there partly to check the drying warmth of what is otherwise a formula made almost entirely of wind-dispersing herbs. A formula that says how to take it inside its own name is worth noticing, because it means the vehicle was understood as part of the action.
The composition is the clearest surviving sample of what is called dividing the channels in herb selection. Ligusticum, schizonepeta, angelica dahurica, notopterygium, saposhnikovia, asarum and mint are all herbs said to release the exterior and disperse wind, but each is assigned a region: notopterygium to the greater yang channel at the back of the head, angelica dahurica to the yang brightness at the forehead, ligusticum to the lesser yang and terminal yin at the sides and crown, asarum to the lesser yin. Read as a map, the formula is an argument that headache can be located and that the herb follows the location. Read as pharmacology, seven aromatic herbs with overlapping volatile-oil content is a different object entirely. Both readings are legitimate; this library does not claim the map has been confirmed.
What the formula was used for — headache with chills, fever, nasal congestion or a stiff neck, in the classical framing an exterior wind pattern — is where a modern reader needs to stop and separate things. Headache is one of the symptoms with the longest and most time-critical differential in medicine. A headache that reaches full intensity within seconds, the thunderclap headache, is subarachnoid haemorrhage until proven otherwise. A new headache after the age of fifty, a headache with fever and neck stiffness, a headache with papilloedema or focal neurological signs or one that is worst in the morning and worsened by coughing, and a headache in someone who is immunosuppressed or has a cancer history each point to imaging or lumbar puncture rather than to herbs. Temporal arteritis in an older adult, presenting with jaw claudication or visual change, can cause permanent blindness and is measured in days. Headache with high blood pressure in pregnancy is a pre-eclampsia question. This library does not present the formula as a treatment for migraine, tension headache, sinusitis or any named cause of head pain.
One further modern point belongs beside any headache formula: medication-overuse headache. Using acute painkillers on ten or more days a month for several months can itself sustain a daily headache, and the way out is supervised withdrawal rather than a stronger remedy. That trap applies to any remedy used repeatedly for head pain, not only to this one.
Safety notes. Asarum is the most serious item on this list. Xi xin is a member of the Aristolochiaceae, the birthwort family, and contains aristolochic acid — the compound behind aristolochic acid nephropathy and the associated urothelial cancers. There is no established safe threshold for cumulative aristolochic acid exposure, and the Chinese Pharmacopoeia restricts asarum to the root and rhizome precisely because the aerial parts carry more of it. Traditionally the herb is also decocted for a long time. Mint and its volatile oil contain menthol; menthol-containing preparations applied to the face or chest of infants and very small children have been associated with laryngospasm, which is a reason for caution with concentrated mint products in that age group quite apart from this formula. Ligusticum here is Ligusticum chuanxiong, which is not interchangeable with the North American plants sharing the genus name. Honey-fried licorice carries the glycyrrhizin risk this library repeats: low potassium, raised blood pressure and oedema, worse with longer use and with diuretics, digoxin or corticosteroids. Notopterygium is a wild-harvested root with genuine supply pressure. Schizonepeta and saposhnikovia are comparatively mild. The tea used as the vehicle contains caffeine and tannins, which is a small but real consideration for anyone counting caffeine. This library gives no amounts and no instructions for use.
川芎茶调散著录于宋代官方方典《太平惠民和剂局方》。它的方名里带了一句大多数方名不带的话：以茶调服。茶不只是送服的东西。传统读法是：茶苦寒而降，方中其余各味几乎全是辛温疏散的风药，茶在其中有一层制约温燥的意思。一首把「怎么服」写进自己名字里的方值得多看一眼 —— 这说明送服物当时是被当作方的一部分来理解的。
组成是所谓「分经用药」保存得最清楚的样本之一。川芎、荆芥、白芷、羌活、防风、细辛、薄荷都属疏散外风一类，但各有归属：羌活走太阳（后头痛连项），白芷走阳明（前额眉棱），川芎走少阳与厥阴（头侧与巅顶），细辛走少阴。当一张地图读，这首方在论证「头痛可以定位，而药随位走」；当药理学读，七味含挥发油的芳香药叠在一起是完全不同的另一个东西。两种读法都站得住，本库不声称这张「地图」已被证实。
它的传统适应证 —— 头痛伴恶寒发热、鼻塞或项强，古典框架里属外感风邪 —— 正是现代读者必须停下来分辨的地方。头痛是医学里鉴别清单最长、时间最急的症状之一。数秒内达峰的「雷击样头痛」在没有排除之前就是蛛网膜下腔出血。五十岁以后新发的头痛、伴发热与颈强直的头痛、伴视乳头水肿或局灶神经体征的头痛、清晨最重且咳嗽加重的头痛、以及免疫抑制者或有肿瘤史者的新发头痛，各自指向影像或腰穿，而不是草药。老年人的颞动脉炎可表现为下颌间歇性疼痛或视力改变，能造成永久失明，按天计。妊娠期头痛伴血压升高是子痫前期的问题。本库不声称此方治疗偏头痛、紧张型头痛、鼻窦炎或任何具体病因的头痛。
还有一条现代事实应写在任何头痛方旁边：药物过度使用性头痛。每月十天以上、连续数月使用急性止痛药本身就能维持每日头痛，出路是在指导下撤药而不是换更强的药。这个陷阱属于任何被反复用于头痛的办法，不专属于这一首。
安全提示。细辛是这份名单上最要紧的一味。它是马兜铃科植物，含马兜铃酸 —— 即马兜铃酸肾病及其相关尿路上皮癌背后的那个化合物。马兜铃酸的累积暴露没有确定安全阈值，中国药典把细辛限定为根及根茎，正因为地上部分含量更高；传统亦要求久煎。薄荷及其挥发油含薄荷脑，含薄荷脑的制剂用于婴幼儿面部或胸部曾关联喉痉挛，因此对浓缩薄荷制品在该年龄段的谨慎与此方本身无关也应成立。此处川芎为 Ligusticum chuanxiong，与北美同属同名植物不可互代。炙甘草带着本库反复写到的甘草酸风险：血钾下降、血压升高、水肿，服用时间长或与利尿剂、地高辛、糖皮质激素同用风险更高。羌活是野生采挖的根，采挖压力真实存在。荆芥与防风相对温和。作送服物的茶含咖啡因与鞣质，对需要计算咖啡因的人不是零。本库不列用量，不给服法。