Gualou Qumai Wan (Trichosanthes, Poria, Yam, Aconite and Dianthus Pill) guā lóu qú mài wán · 栝楼瞿麦丸

Safety. Five ingredients, and two of them carry the heaviest safety records in this library. The line itself is short: 小便不利, there is water qi, and 其人若渴 — the person is thirsty. Thirst appearing together with retained water is worth slowing down over, because that coincidence has a modern form. Start with 若渴. Thirst with copious drinking and copious urine — 消渴 — answers today to a name and to a test rather than to an explanation: diabetes mellitus, and the test is a blood glucose and an HbA1c. Polydipsia and polyuria have a second branch that is not diabetes at all. One is diabetes insipidus, central or nephrogenic, in which the urine is dilute while the sodium climbs. Another is hypercalcaemia, in which thirst arrives alongside constipation, confusion and renal stones. Checking glucose and calcium is cheap, and both belong in the same week rather than eventually. Diabetic ketoacidosis can present with abdominal pain and vomiting rather than with thirst, and hyperosmolar hyperglycaemic state in an older person can present with altered consciousness. This library records those as possibilities a clinician carries; it does not sort them. Now hold 有水气 against reduced urine output. Reduced urine — oliguria — is the earliest sign of acute kidney injury, and it is urgent precisely because obstruction is reversible only while someone is still looking for it: a stone, an enlarged prostate, a stricture, a tumour, a blocked catheter. In an older person retention can announce itself as restlessness or delirium rather than as pain. Oedema has a level-by-level description today. Bilateral pitting oedema points at heart failure, kidney disease, low albumin and medicines such as calcium channel blockers. Unilateral oedema points at venous thrombosis or lymphatic obstruction. Non-pitting oedema with thickening points at lymphoedema or thyroid disease. Periorbital oedema worst in the morning points at the kidney. Thirst plus oedema is the combination that lies across diabetic kidney disease, heart failure, nephrotic syndrome and hypercalcaemia simultaneously. Two materials need to be said plainly. 栝楼根 is trichosanthes root, called 天花粉 in the materia medica. It is neither 瓜蒌 nor 瓜蒌皮 nor 瓜蒌仁, and despite the name it is not pollen — the confusion is old enough to be recorded in the classical literature itself. The protein isolated from it, trichosanthin, was developed and studied for termination of pregnancy and for ectopic pregnancy, and injectable preparations carry records of anaphylactic shock. Pregnancy is therefore an absolute exclusion for this formula, not a caution. 附子 is prepared aconite lateral root. Its diester alkaloids are hydrolysed by prolonged decoction, which is why the classical tradition insists on the cooking rather than the weighing; aconitine poisoning has no specific antidote, and ventricular arrhythmia is what kills. The other three are quieter but not inert. 薯蓣 is Chinese yam — a real carbohydrate load for anyone counting one — and its mucilage is a documented cause of contact itching on the hands of people who peel it; it is not cassava. 瞿麦 is Dianthus, in the pink family. 茯苓 is a fungal sclerotium growing on pine roots; it is not 土茯苓, which is a Smilax. Reliable safety data for breastfeeding are also lacking. Chinese-language clinical literature reports observations of formulas of this class in the classical picture, mostly small and methodologically limited; this library records that such studies exist, not that benefit has been established.