Sheng Mai San ('Generate the Pulse Powder') is a three-herb Traditional Chinese Medicine (TCM) formula first documented in the 13th-century text 'Yi Xue Qi Yuan' by Zhang Yuansu. It combines Ren Shen (Panax ginseng root) to tonify Yuan Qi, Mai Men Dong (Ophiopogon japonicus tuber) to nourish Yin and moisten the lungs, and Wu Wei Zi (Schisandra chinensis fruit) to astringe Qi and prevent further depletion. Together, the three herbs are said to 'generate the pulse,' restore depleted vital energy, and address simultaneous Qi and Yin deficiency.

Modern pharmacological research suggests the formula works through multiple complementary mechanisms: ginsenosides from ginseng exert cardioprotective, anti-inflammatory, and positive inotropic effects; ophiopogonins support cardiomyocyte survival and reduce myocardial ischemia-reperfusion injury; and schisandrins act as antioxidants and mitochondrial protectants, while also modulating myocardial calcium handling. Collectively, these constituents appear to improve myocardial energy metabolism, reduce oxidative stress in cardiac tissue, modulate autonomic nervous system tone, and enhance cardiac output, providing a plausible multimodal basis for the cardiovascular benefits observed in clinical trials.

Traditional decoction uses whole dried herbs simmered in water and is still used in TCM clinical practice. Standardized granule extracts and oral liquid patents (e.g., Shengmai Oral Liquid) offer convenience and consistent dosing. Shengmai Injection is a proprietary intravenous preparation widely used in Chinese hospitals for acute cardiac support but is not approved by the US FDA or EMA and should never be self-administered.

• Chronic Heart Failure
• Cardiac Arrhythmia
• Exercise Intolerance / Dyspnea on Exertion
• Post-Myocardial Infarction Recovery
• Fatigue (Qi and Yin Deficiency Pattern)

• Myocardial ischemia-reperfusion injury (adjunctive, supported by RCT-level evidence in peri-procedural cardiac settings in Chinese clinical research)
• Progression of NYHA functional class deterioration in chronic heart failure (supported by meta-analytic data as adjunct to standard therapy)

• American Ginseng or Asian Ginseng (Panax ginseng / quinquefolius) root — Ren Shen (Panax ginseng) is one of the three core herbs in Sheng Mai San; consuming ginseng root tea or standardized ginseng extract provides ginsenosides, the primary bioactive compounds of the ginseng component of this formula.
• Schisandra berries (Wu Wei Zi) — Wu Wei Zi (Schisandra chinensis) dried berries or berry tea provide schisandrins and related lignans that constitute the astringent, antioxidant, and cardioprotective third component of Sheng Mai San; available as whole dried berries or tea in health food stores.
• Ophiopogon japonicus (Mai Men Dong) tuber — Mai Men Dong tuber is the second herb in the formula and the primary source of ophiopogonins; it is available as a dried herb for decoction in TCM herb shops and some Asian grocery stores, often used in soups.
• Astragalus-based broths and soups (Huang Qi) — While not part of Sheng Mai San itself, Astragalus membranaceus root (Huang Qi) is commonly combined with Sheng Mai San in TCM clinical practice for Qi deficiency; astragalus-fortified soups and bone broths support the same Qi-tonifying biological pathway (immune modulation, adaptogenic effects) and are a traditional dietary accompaniment.
• Jujube dates (Da Zao) and longan fruit (Long Yan Rou) — These traditional TCM dietary foods are used to nourish Yin and support Qi, paralleling the Yin-nourishing function of Mai Men Dong in Sheng Mai San; they are commonly consumed alongside the formula in traditional dietary therapy (shi liao) for patients with Qi and Yin deficiency patterns.

• Gastrointestinal discomfort (nausea, bloating, loose stools) — primarily from high ginseng doses
• Insomnia or mild restlessness — associated with ginseng component, particularly with evening dosing
• Headache — reported in a minority of users in clinical trials
• Allergic skin reactions (rash, urticaria) — rare with oral forms
• Anaphylaxis — rare but documented with injectable Shengmai Injection formulation
• Hypertension (with high or prolonged ginseng intake) — uncommon at standard formula doses
• Estrogenic effects (breast tenderness, menstrual irregularities) — reported with long-term ginseng use; relevant to ginseng component
• Drug interactions via CYP450 modulation (schisandrin) — pharmacokinetic rather than a direct side effect but clinically significant

• Recommended daily: Traditional decoction: Ren Shen 9g + Mai Men Dong 9g + Wu Wei Zi 6g, simmered in water, taken as 1–2 cups daily. Standardized oral granule or liquid extract: follow product label, typically 10–20 mL of oral liquid twice daily or 3–6g granules twice daily. Standardized capsule products: typically 2–4 capsules (equivalent to 3–6g dried herb) 2–3 times daily. Dosing should be guided by a licensed TCM practitioner for individualized pattern-based adjustment.
• Best time of day: Traditionally taken in the morning and midday to align with Yang-ascending time periods in TCM chronobiology; avoid late evening dosing due to ginseng's mild stimulant properties.
• With or without food: Oral decoctions and liquid extracts are traditionally taken on an empty stomach or 30 minutes before meals for optimal absorption, though capsule/tablet forms may be taken with food to reduce gastrointestinal discomfort.
• Time to effect: Acute functional improvement (e.g., in injectable peri-operative settings): within hours. Chronic cardiovascular support with oral preparations: noticeable improvement in exercise tolerance and symptoms typically reported at 4–8 weeks; full effect assessment at 12 weeks.
• How long to take it: For chronic cardiovascular support as an adjunct: typically used continuously for 8–12 week treatment courses under practitioner supervision, followed by re-evaluation. Not intended for indefinite unsupervised self-administration. For acute or seasonal Qi/Yin deficiency: shorter courses of 4–6 weeks are common in TCM practice.