Herbal Monograph
Schisandra
Schisandra chinensis (Turcz.) Baill.
Schisandraceae
Premier adaptogen and liver protectant -- the five-flavor berry of Chinese an...
Overview
Plant Description
Schisandra chinensis is a deciduous, dioecious woody climbing vine reaching 6-9 meters (20-30 feet) in length with twining stems. Bark is aromatic, reddish-brown, and papery on older stems. Leaves are alternate, elliptic to obovate, 5-11 cm long and 3-7 cm wide, with finely serrated margins and short petioles. Flowers are unisexual, fragrant, creamy-white to pale pink, approximately 1.5 cm across, appearing in spring from leaf axils on pendulous peduncles. Female flowers develop a characteristically elongating receptacle that, upon fertilization, produces a dense, pendulous spike of 20-30 fleshy, globose, bright red berries (each 5-8 mm diameter) resembling a cluster of red currants. The fruit is the officinal part and is unique in possessing all five fundamental tastes recognized in Chinese medicine -- sweet, sour, salty, bitter, and pungent -- hence the Chinese name 'wu wei zi' (five-flavor berry). The sour taste predominates, followed by bitter and sweet.
Habitat
Native to moist, well-drained mixed deciduous and coniferous forests at elevations of 200-1700 meters. Thrives in partial shade with moist, humus-rich, slightly acidic soil (pH 5.0-6.5). Found growing along forest margins, stream banks, and ravines, typically climbing over trees and shrubs. Requires support structures for climbing. Cold-hardy to USDA Zone 4 (tolerates winter temperatures to -30 degrees C).
Distribution
Native to northeastern China (Manchuria, Heilongjiang, Jilin, Liaoning provinces), the Russian Far East (Primorsky Krai, Khabarovsk Krai, Amur Oblast, Sakhalin), Korea, and northern Japan (Hokkaido, northern Honshu). Major commercial production in China (Liaoning, Heilongjiang, and Jilin provinces), with additional cultivation in Russia, Korea, and increasingly in Eastern Europe (Poland, Czech Republic) and North America. Wild populations have declined due to overharvesting, prompting increased cultivation efforts.
Parts Used
Fruit (Schisandrae chinensis fructus)
Preferred: Dried whole berries for decoction; hydroethanolic tincture; standardized extract (capsule or tablet); powdered dried fruit
The dried ripe fruit is the official drug in the Chinese Pharmacopoeia, Russian Pharmacopoeia, and WHO monograph. The fruit contains the signature dibenzocyclooctadiene lignans (schisandrins) that are responsible for the primary pharmacological activities. Both the fruit flesh and seeds are therapeutically relevant, with lignans concentrated primarily in the seeds. The Chinese Pharmacopoeia requires not less than 0.4% schisandrin content in the dried fruit.
Key Constituents
Dibenzocyclooctadiene lignans
The dibenzocyclooctadiene lignans are the signature bioactive compounds of Schisandra chinensis and are unique to the Schisandraceae family. Over 40 individual lignans have been isolated. They are responsible for the hepatoprotective, adaptogenic, antioxidant, and cognitive-enhancing effects. Lignans are concentrated in the seed portion of the fruit. The total lignan content in dried berries typically ranges from 1.5-4.0%. Chinese Pharmacopoeia uses schisandrin (minimum 0.4%) as the quality marker. Standardized commercial extracts are often standardized to total schisandrins (2-9%) or schisandrin B specifically.
Essential oil (sesquiterpenes and monoterpenes)
The essential oil content of dried schisandra fruit is approximately 1-3% and contributes to the aromatic and pungent taste characteristics. The sesquiterpene-rich oil has mild antimicrobial and anti-inflammatory properties but is not considered a primary therapeutic fraction -- the lignans are far more significant pharmacologically. The essential oil contributes to the overall organoleptic and energetic properties of the drug.
Organic acids
Organic acids account for the predominant sour taste of schisandra berries (approximately 10-15% of dried fruit weight as total organic acids). The sour taste is the most immediately perceptible of the five flavors. Citric and malic acids contribute to the overall antioxidant profile and may enhance mineral absorption. The organic acid content is relevant for quality assessment -- excessively dried or aged berries lose acidity.
Phytosterols and triterpenoids
Phytosterols and triterpenoids are minor constituents relative to the lignans but contribute to the overall phytochemical complexity of schisandra. Their individual therapeutic contribution at doses achieved through normal schisandra consumption is likely modest.
Polysaccharides and vitamins
Polysaccharides contribute to immunomodulatory activity and may partly explain the traditional use of schisandra for strengthening immune function and resistance to infection. Research on schisandra polysaccharides is growing but currently less extensive than lignan research.
Herbal Actions
Helps the body adapt to stress and restore homeostasis
Schisandra is one of the original adaptogens defined by Soviet researchers Brekhman and Dardymov (1969), meeting all three criteria: nonspecific resistance enhancement, normalizing effect irrespective of the direction of pathological change, and innocuousness to the host. Soviet research on schisandra as an adaptogen dates to the 1940s-1960s (Lazarev, Brekhman), when it was studied extensively for enhancing physical and mental performance of soldiers, athletes, and factory workers. Adaptogenic activity is attributed primarily to the dibenzocyclooctadiene lignans, which modulate the HPA axis, influence cortisol levels, and support cellular stress resistance via heat shock protein induction and antioxidant enzyme upregulation.
[1, 6, 7, 11]Protects the liver from damage
Hepatoprotection is the most extensively documented pharmacological activity of schisandra, with evidence spanning from traditional use to modern clinical trials. Schisandrin B, gomisin A, and related lignans protect hepatocytes against damage from carbon tetrachloride, acetaminophen, D-galactosamine, and oxidative stress in animal models. Mechanisms include: induction of hepatic glutathione synthesis and glutathione S-transferase activity, inhibition of lipid peroxidation, stabilization of hepatocyte membranes, and enhancement of liver regeneration. Clinical studies in China, Japan, and Korea have demonstrated reduction of elevated serum transaminases (ALT, AST) in patients with chronic hepatitis. The proprietary product DDB (dimethyl-4,4'-dimethoxy-5,6,5',6'-dimethylenedioxybiphenyl-2,2'-dicarboxylate), a synthetic analog of schisandrin C, was developed in China specifically as a hepatoprotective drug.
[1, 4, 6, 12]Prevents or slows oxidative damage to cells
The lignans, particularly schisandrin B and schisandrol A, demonstrate potent antioxidant activity through multiple mechanisms: direct free radical scavenging, induction of endogenous antioxidant enzymes (superoxide dismutase, catalase, glutathione peroxidase, glutathione reductase), enhancement of glutathione synthesis, and inhibition of lipid peroxidation. Schisandrin B enhances mitochondrial glutathione status, protecting against mitochondrial oxidative damage. The organic acids and vitamin C content provide additional antioxidant capacity.
[1, 4, 6]Supports and calms the nervous system
Schisandra supports nervous system function through multiple pathways. It enhances cognitive performance, improves concentration, and supports mental endurance under stress. Soviet-era research documented improved accuracy and speed of performance in telegraph operators, translators, and night vision tasks. The nervine action is stimulating rather than sedating at normal doses, distinguishing it from relaxant nervines like chamomile or passionflower. Lignans modulate neurotransmitter systems including GABAergic, glutamatergic, cholinergic, and monoaminergic pathways.
[1, 7, 11]Tightens and tones tissue, reduces secretions
The astringent action is consistent with the sour taste that dominates the five-flavor profile. In TCM, the sour and astringent quality of wu wei zi is used to astringe leaking or loss of body fluids: excessive sweating (spontaneous or night sweats), chronic diarrhea, urinary frequency, spermatorrhea, and chronic cough with thin watery sputum. This action reflects tissue-toning and fluid-retaining properties.
[1, 10]Modulates and balances immune function
Schisandra polysaccharides and lignans modulate immune function. Preclinical studies demonstrate enhanced macrophage phagocytic activity, modulation of cytokine production (both Th1 and Th2), and increased natural killer cell activity. The immunomodulatory action is bidirectional (adapts to the immunological needs of the host), consistent with the adaptogenic profile. Traditional use for enhancing resistance to infection and supporting recovery from illness.
[1, 6]Reduces inflammation
Gomisin A and gomisin N inhibit NF-kB activation and suppress production of pro-inflammatory cytokines (TNF-alpha, IL-1beta, IL-6) and inflammatory mediators (nitric oxide, PGE2) in preclinical models. Anti-inflammatory activity contributes to the hepatoprotective mechanism and may be relevant to respiratory and musculoskeletal applications.
[1, 6]Enhances cognitive function, memory, and mental performance
Schisandra enhances cognitive function, memory, and mental performance. Preclinical studies demonstrate improved learning and memory in rodent models, with proposed mechanisms including acetylcholinesterase inhibition, modulation of brain monoamines, and neuroprotective antioxidant effects. A clinical trial by Aslanyan et al. (2010) found a combination product containing schisandra improved attention, cognitive function, and speed of performance in stressed adults.
[1, 5, 7]Promotes the discharge of mucus from the respiratory tract
Traditionally used in Chinese medicine for chronic cough, particularly dry or wheezing cough with fluid loss. The mechanism is primarily astringent rather than stimulating expectorant -- schisandra 'contains' lung qi and prevents excessive loss of fluids, thereby supporting respiratory function. Used in classical formulas for asthma and chronic bronchitis.
[1, 10]Strengthens and tones the heart muscle
Schisandrin B and related lignans demonstrate cardioprotective effects in preclinical models, including improved cardiac mitochondrial function, protection against ischemia-reperfusion injury, and mild vasodilatory effects. Traditional use in TCM for palpitations and cardiovascular support. Clinical evidence for cardiovascular effects is limited.
[1, 6]Therapeutic Indications
Hepatobiliary System
Chronic hepatitis with elevated liver enzymes
Multiple clinical studies in China and Japan have demonstrated that schisandra preparations reduce elevated serum ALT and AST levels in patients with chronic hepatitis B and C. Ip et al. (2000) reviewed evidence showing schisandrin B protects hepatocytes against oxidative and chemical damage. The synthetic lignan analog DDB (biphenyl dimethyl dicarboxylate) was developed from schisandrin C and is approved in China and Korea as a hepatoprotective drug. WHO monograph acknowledges hepatoprotective use.
[1, 4, 12]Drug- and toxin-induced liver injury (adjunctive support)
Schisandrin B protects against liver damage from acetaminophen, carbon tetrachloride, and other hepatotoxins in animal models through induction of glutathione synthesis and antioxidant enzyme systems. Used traditionally and clinically in China as hepatoprotective support during exposure to medications known to stress the liver.
[4, 6]General liver support and detoxification enhancement
Traditional use in TCM for tonifying liver yin and supporting liver function. Lignans enhance phase I and phase II hepatic detoxification enzymes, including induction of cytochrome P450 enzymes and glutathione S-transferase. Used as a liver tonic in individuals with liver qi stagnation, fatigue, and environmental toxic exposures.
[1, 10]Nervous System
Mental fatigue and impaired concentration under stress
Soviet-era research extensively documented improvements in mental performance, concentration, accuracy, and coordination in workers and military personnel taking schisandra preparations. Panossian & Wikman (2009) reviewed evidence for schisandra's cognitive-enhancing effects, attributing them to modulation of cortisol, neurotransmitter balance, and neuroprotective antioxidant activity. Aslanyan et al. (2010) found improved cognitive function in stressed subjects using a combination adaptogen product containing schisandra.
[5, 7, 11]Stress-related fatigue and burnout
The adaptogenic action helps the body resist and recover from the effects of chronic stress. Schisandra modulates the hypothalamic-pituitary-adrenal (HPA) axis, normalizing cortisol responses and protecting against stress-induced depletion. Indicated for individuals experiencing chronic stress with symptoms of fatigue, poor concentration, and reduced work capacity.
[1, 6, 7]Neurasthenia and nervous exhaustion
Listed in the Russian Pharmacopoeia for conditions associated with nervous exhaustion and neurasthenia. Used in Russian and Soviet clinical practice for patients with fatigue, weakness, reduced mental and physical capacity, and depressed mood associated with overwork or convalescence.
[1, 11]Endocrine System
HPA axis dysregulation and adrenal fatigue
As a primary adaptogen, schisandra modulates the stress response at the level of the HPA axis. Lignans normalize elevated cortisol levels in stressed animals, prevent adrenal hypertrophy associated with chronic stress, and maintain catecholamine balance. Used clinically by practitioners for patients with signs of adrenal depletion: chronic fatigue, poor stress tolerance, and disrupted circadian cortisol patterns.
[6, 7]Physical endurance and exercise performance
Soviet military and sports research documented increased physical endurance, reduced exercise-induced fatigue, and improved recovery in athletes and soldiers. Mechanisms include enhanced mitochondrial energy production, improved oxygen utilization, and protection against exercise-induced oxidative stress. WHO monograph acknowledges traditional and modern use for enhancing physical performance.
[1, 7, 11]Respiratory System
Chronic cough (dry, non-productive)
Classical TCM indication for chronic cough, particularly dry or wheezing cough associated with lung qi and yin deficiency. The astringent property contains the dispersal of lung qi. Used in formulas such as Sheng Mai San (Generate the Pulse Powder) for cough with shortness of breath. Not indicated for acute productive cough or cough with profuse sputum.
[1, 10]Exercise-induced and allergic asthma (adjunctive)
Preliminary evidence suggests anti-inflammatory lignans may modulate airway inflammation. Gomisin A suppresses eosinophil recruitment and Th2 cytokine production in animal models of allergic asthma. Traditional use in combination formulas for wheezing and dyspnea.
[6]Immune System
Reduced resistance to infection and recurrent illness
Traditional use in both Chinese and Russian medicine for enhancing resistance to infection and supporting recovery from illness. Polysaccharide and lignan fractions demonstrate immunomodulatory effects in preclinical studies, including enhanced macrophage activity and natural killer cell function. Used as a general tonic to prevent illness during periods of stress or seasonal transitions.
[1, 6]Cardiovascular System
Palpitations and cardiovascular stress (adjunctive)
Traditional TCM indication: palpitations associated with heart qi and yin deficiency. Used in the classical formula Sheng Mai San alongside Panax ginseng and Ophiopogon japonicus for palpitations, shortness of breath, and fatigue. Schisandrin B demonstrates cardioprotective effects in preclinical models through improved mitochondrial function and antioxidant protection.
[1, 10]Reproductive System
Sexual dysfunction and reproductive vitality (traditional tonic use)
Traditional TCM use for tonifying kidney essence (jing) and supporting reproductive function in both men and women. Used for spermatorrhea, nocturnal emissions, and decreased libido associated with kidney deficiency patterns. Classified as a kidney yang and yin tonic. Adaptogenic effects on the endocrine system may indirectly support reproductive health.
[10]Urinary System
Urinary frequency and nocturia (traditional, deficiency-type)
Astringent action used in TCM to contain urinary frequency associated with kidney qi deficiency. Used in elderly patients with nocturia and in children with enuresis in combination formulas. The astringent quality helps to 'hold' fluids and reduce excessive urinary output.
[10]Digestive System
Chronic diarrhea (deficiency-type)
The astringent property makes schisandra traditionally indicated for chronic, watery diarrhea associated with spleen qi deficiency in TCM. Not for acute diarrhea or diarrhea with heat signs. Used in combination formulas for chronic loose stools with fatigue and poor appetite.
[1, 10]Energetics
Temperature
warm
Moisture
slightly dry
Taste
Tissue States
cold/depression, wind/tension, damp/relaxation
Schisandra is unique among all medicinal plants in possessing all five fundamental tastes (wu wei) recognized in Chinese medicine, earning it the name 'wu wei zi' (five-flavor berry). The sour taste is predominant, followed by bitter and sweet, with salty and pungent being subtler. In TCM, this five-taste quality indicates that schisandra enters all five yin organs (Liver, Heart, Kidney, Lung, Spleen) and harmonizes their function. The warming energy and astringent-sour quality make it specific for patterns of deficiency with fluid loss -- leaking of jing (essence), qi, or body fluids. Western herbal energetics classifies it as warm and slightly drying, suitable for cold, deficient, and lax tissue states where containment and tonification are needed. It is contraindicated in excess heat patterns and acute infections in TCM. CAVEAT: Herbal energetics are interpretive frameworks within Western and Chinese herbalism, not standardized across all practitioners.
Traditional Uses
Traditional Chinese Medicine (TCM)
- Tonifies kidney qi and jing (essence); treats nocturnal emissions, spermatorrhea, urinary incontinence
- Astringes lung qi; treats chronic cough and wheezing (especially dry, non-productive)
- Calms the heart and quiets the spirit (shen); treats palpitations, insomnia, dream-disturbed sleep
- Inhibits sweating; treats spontaneous sweating and night sweats
- Generates fluids and stops thirst; treats wasting-thirsting disorder (xiao ke) and excessive thirst
- Contains diarrhea; treats chronic diarrhea due to spleen and kidney deficiency
- Tonifies liver blood and yin; supports vision and liver function
"First recorded in the Shen Nong Ben Cao Jing (Divine Farmer's Classic of Materia Medica, circa 200 CE), classified as a superior (shang pin) herb, meaning it can be taken long-term without toxicity to promote health and longevity. 'Wu wei zi: sour and warm. Treats cough with counterflow qi, taxation damage, supplements deficiency, benefits qi, strengthens yin, and supplements the male essence.' Classical TCM categorizes it as an astringent herb that stabilizes and binds (gu se yao)."
Russian and Soviet phytotherapy
- Enhancement of physical endurance and work capacity in soldiers, athletes, and workers
- Improvement of mental performance, concentration, and accuracy under stress
- Enhancement of night vision and visual acuity
- General tonic for neurasthenia, fatigue, and nervous exhaustion
- Support during convalescence from illness
- Adaptogenic support during extreme environments (cold, heat, altitude)
"Soviet research on Schisandra chinensis (limonnik in Russian) began in the 1940s, driven by wartime interest in performance enhancement. Lazarev first used the term 'adaptogen' in 1947, and Brekhman later formalized the concept with schisandra and Eleutherococcus as key examples. The Russian Pharmacopoeia includes Schisandra chinensis fruit tincture (Tinctura Schisandrae) as an official drug for asthenic conditions. Soviet-era studies documented improved accuracy in telegraph operators, enhanced marksmanship in soldiers, and increased endurance in runners."
Korean traditional medicine (Hanbang)
- Liver protection and treatment of hepatitis (omija)
- Respiratory tonic for chronic cough and asthma
- General longevity tonic and qi-strengthening agent
- Omija-cha (five-flavor berry tea) consumed as a health drink
- Treatment of excessive sweating and thirst
"Known as 'omija' (five-taste berry) in Korean, schisandra has been used for centuries in Korean traditional medicine and cuisine. Omija-cha (schisandra tea) is a popular traditional beverage. Korean traditional medicine utilizes schisandra similarly to Chinese medicine, with particular emphasis on liver protection and respiratory support."
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Japanese Kampo medicine
- Ingredient in Kampo formulas for cough and respiratory conditions
- Liver-protective preparations (gomishi)
- Component of tonifying formulas for chronic fatigue
"Known as 'gomishi' in Japanese, schisandra appears in several Kampo (traditional Japanese-Chinese) formulas. Japanese pharmaceutical research in the 1970s-1980s extensively investigated the hepatoprotective properties of gomisin A and related lignans, leading to semi-synthetic hepatoprotective drug development."
Nanai (Goldi) and indigenous peoples of the Russian Far East
- Dried berries consumed as a trail food for sustained energy during long hunts
- Treatment of fatigue, cold, and hunger during winter travel
- Enhancement of night vision for hunting
- General strengthening tonic
"The indigenous Nanai (Goldi) people of the Amur River region consumed dried schisandra berries and prepared decoctions as a tonic to increase endurance, resist cold, and reduce hunger during long hunting expeditions. It was their traditional reports of enhanced endurance and vision that first drew Soviet researchers' attention to the plant in the 1940s."
Modern Research
Hepatoprotective mechanisms of schisandrin B
Comprehensive review of the hepatoprotective activity of schisandrin B, examining its mechanisms of action in protecting the liver against chemical and oxidative injury.
Findings: Schisandrin B protects hepatocytes through multiple mechanisms: (1) enhancement of mitochondrial glutathione status, (2) induction of glutathione S-transferase and glutathione reductase, (3) inhibition of lipid peroxidation, (4) induction of heat shock proteins (HSP25 and HSP70), and (5) protection against mitochondrial dysfunction. In animal models, schisandrin B protected against liver injury induced by carbon tetrachloride, acetaminophen (paracetamol), tert-butyl hydroperoxide, and mercuric chloride. The hepatoprotective dose in rodents was 0.5-5.0 mmol/kg.
Limitations: Primarily preclinical (in vitro and animal model) evidence. Human clinical trials were limited and mostly conducted in China with variable methodological quality. Standardization of schisandrin B content varies across preparations.
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Pharmacology of Schisandra chinensis: Russian research overview
Comprehensive review of Russian and Soviet research on the pharmacology of Schisandra chinensis, including adaptogenic, hepatoprotective, anti-inflammatory, antioxidant, and CNS-stimulating effects, spanning over 60 years of investigation.
Findings: Evidence supports that schisandra and other adaptogens increase resistance to stress by modulating multiple pathways: HPA axis regulation, nitric oxide signaling, cortisol metabolism, molecular chaperone (heat shock protein) induction, and JNK/SAPK stress-activated kinase pathways. Schisandrin B was identified as a key mediator of the adaptogenic response. The review documented pharmacological effects on liver (hepatoprotection), CNS (cognitive enhancement, anti-fatigue), cardiovascular (cardioprotection), immune (immunomodulation), and endocrine (stress hormone normalization) systems.
Limitations: Heterogeneity of included studies. Variable quality of clinical trials (many were Soviet-era with limited methodological transparency by modern standards). Many studies used combination products, making it difficult to attribute effects to schisandra specifically.
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Stimulating and adaptogenic effects of schisandra on the CNS
Review of pharmacological evidence for the stimulating and adaptogenic effects of Schisandra chinensis on the central nervous system, including cognitive enhancement, physical performance, and stress resistance.
Findings: Schisandra lignans demonstrate CNS-stimulating activity distinct from classical stimulants (caffeine, amphetamines) in that they enhance performance without subsequent rebound depression or dependence. Effects documented include: improved mental performance and accuracy under stress, enhanced physical endurance, improved reaction time, and enhanced night vision. Proposed mechanisms include modulation of nitric oxide, cortisol, and brain monoamine neurotransmitters. Anti-fatigue effects correlate with improved mitochondrial energy metabolism in brain tissue.
Limitations: Much of the original Soviet-era research has limited accessibility in English. Some early studies lacked placebo controls or blinding. Effects may be modest compared to pharmaceutical stimulants.
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Adaptogen combination (ADAPT-232) for cognitive function under stress
Randomized, double-blind, placebo-controlled trial of a standardized combination of Rhodiola rosea, Schisandra chinensis, and Eleutherococcus senticosus (ADAPT-232) in 40 healthy women experiencing stress and fatigue, over a single-dose cognitive testing paradigm.
Findings: The adaptogen combination significantly improved attention, speed, and accuracy on cognitive tasks (number checking, conflict diamond test) compared to placebo. Quality of work under stressful conditions was improved. No significant adverse effects were reported.
Limitations: Small sample size (n=40). Combination product -- effects cannot be attributed to schisandra alone. Single-dose acute study design; long-term effects not assessed. Healthy volunteers; results may differ in clinical populations.
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Schisandrin B inhibition of CYP3A4 and drug interactions
Investigation of the inhibitory effect of Schisandra chinensis fruit extract constituents on cytochrome P450 3A4 (CYP3A4), the most abundant hepatic drug-metabolizing enzyme, using in vitro enzyme assays and identifying the responsible compounds.
Findings: Schisandrin B and schisandrol B were identified as the most potent CYP3A4 inhibitors in schisandra fruit extract. Schisandrin B demonstrated mechanism-based (irreversible) inhibition of CYP3A4 with potent IC50 values in the low micromolar range. This inhibition can increase plasma concentrations of co-administered drugs metabolized by CYP3A4. The interaction has clinical significance for narrow therapeutic index drugs such as tacrolimus and cyclosporine.
Limitations: In vitro study using human liver microsomes; in vivo clinical significance may vary depending on dose and individual patient factors. The study did not include clinical pharmacokinetic endpoints in human subjects.
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Schisandra and tacrolimus pharmacokinetic interaction
Clinical investigation of the effects of Schisandra sphenanthera extract (Wuzhi tablet) on the pharmacokinetics of tacrolimus in organ transplant patients, providing clinical evidence for the CYP3A4 interaction.
Findings: Co-administration of schisandra-containing Wuzhi tablets significantly increased tacrolimus trough blood concentrations in renal transplant recipients, requiring dose adjustments. The interaction was attributed to CYP3A4 and P-glycoprotein inhibition by schisandrin B and related lignans. Some transplant centers in China have intentionally used this interaction to reduce tacrolimus dose requirements and associated costs.
Limitations: Observational cohort design; not a randomized controlled trial. Used S. sphenanthera (not S. chinensis), though both contain similar CYP3A4-inhibiting lignans. Dose-response relationship and inter-individual variability require further characterization.
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Schisandra polysaccharides and immunomodulatory activity
Investigation of immunomodulatory effects of polysaccharides isolated from Schisandra chinensis fruit in both in vitro and in vivo models.
Findings: Schisandra polysaccharides enhanced macrophage phagocytic activity, stimulated proliferation of splenocytes, increased natural killer cell cytotoxicity, and modulated cytokine production (increased IL-2, IFN-gamma; modulated TNF-alpha) in murine models. The immunomodulatory effects were dose-dependent and did not cause over-stimulation at tested doses, consistent with the adaptogenic (normalizing) paradigm.
Limitations: Animal model data; human clinical trials on immune endpoints are lacking. Polysaccharide fraction composition may vary between preparations. Dose translation from rodent to human is uncertain.
Preparations & Dosage
Decoction
Strength: 3-6 g dried berries per 300-400 mL water
Add 3-6 g (approximately 1-2 teaspoons) of dried schisandra berries to 300-400 mL of water. Bring to a boil, then reduce heat and simmer gently for 15-20 minutes. Strain and drink. The berries can be lightly crushed before decocting to improve extraction of lignans from the seeds.
3-6 g dried berries simmered in 300-400 mL water, taken as 1-2 cups daily
1-2 times daily
May be used for extended periods (weeks to months) as a tonic. Reassess therapeutic need every 2-3 months.
Not generally recommended for children under 12 without practitioner guidance
Decoction is the traditional Chinese preparation method for schisandra berries, as the hard seed coat requires prolonged simmering to extract the lignans effectively. An infusion (steeping in hot water) will extract organic acids and some water-soluble compounds but is less efficient for lignan extraction. The decoction has a complex, predominantly sour taste with bitter, sweet, salty, and pungent undertones. Chinese Pharmacopoeia specifies 2-6 g daily dose of the crude drug.
Tincture
Strength: 1:5, 60-70% ethanol (dried crushed berries)
Hydroethanolic extraction of dried crushed schisandra berries. Standard ratio 1:5 in 60-70% ethanol. Macerate for 4-6 weeks with regular agitation, then press and filter. Higher alcohol percentage than some tinctures is needed to effectively extract the lipophilic lignans.
2-4 mL (40-80 drops) two to three times daily
Two to three times daily, preferably before meals
May be used for extended periods as a tonic. Reassess every 2-3 months.
Not recommended for children under 12
Tincture provides efficient extraction of both lignans (lipophilic) and organic acids (hydrophilic). The high ethanol percentage is important for extracting the dibenzocyclooctadiene lignans, which have limited water solubility. Russian Pharmacopoeia includes a schisandra fruit tincture (1:5 in 95% ethanol) as an official preparation. Some Western herbalists use 1:3 fresh berry tincture in 65% ethanol.
Capsule / Powder
Strength: Crude dried berry powder, typically 500 mg per capsule
Dried schisandra berry powder, finely ground and encapsulated. Berries should be ground to include both fruit flesh and seeds to ensure lignan content.
500-1500 mg dried berry powder, 2-3 times daily (total daily dose 1-4.5 g)
2-3 times daily with water, before or with meals
May be used for extended periods. Reassess every 2-3 months.
Not recommended for children under 12 in capsule form
Powdered capsules are a convenient form but may provide less consistent lignan extraction than tincture or standardized extract. Ensure the product includes ground seeds, as lignans are concentrated in the seed portion. Chinese Pharmacopoeia daily dose range: 2-6 g crude drug.
Standardized Extract
Strength: Standardized to 2-9% total schisandrins. DER (drug-to-extract ratio) varies, typically 5-10:1.
Capsules or tablets containing concentrated schisandra extract standardized to total schisandrins or schisandrin B content. Typical standardization: 2-9% total schisandrins (sometimes labeled as total lignans).
250-500 mg of standardized extract (2-9% schisandrins), 1-2 times daily. Some clinical studies have used 500-1000 mg daily of extracts standardized to specific lignan content.
1-2 times daily
May be used for extended periods. Reassess every 2-3 months.
Not established for children
Standardized extracts provide consistent, quantified doses of the pharmacologically active lignans and are the form most comparable to clinical trial materials. Products vary considerably in standardization parameters -- some standardize to total schisandrins, others to schisandrin B specifically. When hepatoprotection is the primary goal, products standardized to schisandrin B content are preferred.
Syrup
Strength: Concentrated decoction preserved with honey or sugar (approximately 1:1 decoction to sweetener)
Prepare a strong decoction (double strength: 10-12 g berries in 400 mL water, simmered until reduced to approximately 200 mL). Strain, add equal volume of honey or sugar. Gently heat while stirring until dissolved. Cool and store in a sterilized glass bottle in the refrigerator.
10-15 mL (2-3 teaspoons) 2-3 times daily
2-3 times daily
Use within 4-6 weeks of preparation. May be used seasonally.
Children over 6 years: 5 mL, 1-2 times daily (consult practitioner)
Syrup is a traditional preparation that makes the sour taste more palatable and provides a longer shelf life than simple decoction. Honey-based syrups add additional soothing properties relevant to respiratory indications. Particularly useful for chronic cough and as a palatable daily tonic.
Glycerite
Strength: 1:5, 60% glycerin / 40% water
Extraction of dried crushed schisandra berries in vegetable glycerin and water (60:40 glycerin to water ratio). Macerate for 6-8 weeks with daily agitation. Glycerites extract water-soluble compounds well but are less efficient for lipophilic lignans compared to ethanolic tinctures.
3-5 mL two to three times daily
Two to three times daily
May be used for extended periods
Children 6-12 years: 1-2 mL, 1-2 times daily (consult practitioner)
Alcohol-free option for those avoiding ethanol. Less efficient for extracting the lipophilic lignans than tincture, so higher doses or longer maceration periods may be needed. The glycerite does extract organic acids and some polar lignans effectively. Sweet taste of glycerin helps offset the sour and bitter flavors of schisandra.
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Safety & Interactions
Class 2b
Not to be used during lactation (AHPA Botanical Safety Handbook)
Contraindications
AHPA Class 2b: not to be used during pregnancy. Schisandra has traditional indications as a uterine tonic and may have uterine-stimulant potential. While no teratogenic effects have been documented, insufficient safety data exists for use during pregnancy. The warming and stimulating properties are considered potentially disruptive to pregnancy in TCM. Avoid therapeutic doses during pregnancy.
In TCM, schisandra's astringent quality is considered contraindicated during the acute phase of exterior pathogen invasion (e.g., common cold, influenza onset), as the astringent action may 'trap' the pathogen. This is a traditional contraindication based on TCM theory rather than pharmacological toxicity data.
Extremely rare. Allergic reactions to schisandra are very uncommon but theoretically possible. Discontinue use if signs of allergic reaction occur.
Drug Interactions
| Drug / Class | Severity | Mechanism |
|---|---|---|
| Tacrolimus (FK506) (Calcineurin inhibitors / immunosuppressants) | major | Schisandrin B is a potent mechanism-based inhibitor of CYP3A4 and P-glycoprotein. Tacrolimus is primarily metabolized by CYP3A4. Co-administration of schisandra extract has been documented to significantly increase tacrolimus blood levels, potentially leading to toxicity. |
| CYP3A4 substrates (cyclosporine, midazolam, nifedipine, simvastatin, indinavir, and others) (CYP3A4 substrates) | moderate | Schisandrin B and schisandrol B inhibit CYP3A4 activity, potentially increasing plasma concentrations of co-administered drugs metabolized by this enzyme. The inhibition is mechanism-based (irreversible), meaning effects may persist after discontinuation of schisandra until new enzyme is synthesized. |
| Warfarin and other anticoagulants (Anticoagulants) | theoretical | Theoretical interaction based on schisandra's ability to modulate cytochrome P450 enzymes. Warfarin is metabolized by CYP2C9 and CYP3A4. Schisandrol B has shown in vitro inhibition of CYP2C9. Additionally, some lignan metabolites may theoretically affect platelet function. |
| CNS stimulants (caffeine, methylphenidate, amphetamines) (CNS stimulants) | minor | Schisandra has CNS-stimulating properties. Additive stimulation is theoretically possible when combined with pharmaceutical or dietary stimulants, potentially increasing restlessness, insomnia, or anxiety. |
Pregnancy & Lactation
Pregnancy
possibly unsafe
Lactation
insufficient data
AHPA Class 2b: not to be used during pregnancy. Traditional TCM sources advise caution during pregnancy due to potential uterine-stimulant activity. No human teratogenicity data are available. Animal reproductive toxicity studies are limited. The WHO monograph notes that safety during pregnancy has not been established. The astringent and warming properties are considered potentially disruptive in TCM pregnancy care. During lactation, insufficient data exist to establish safety. Schisandra has not been traditionally contraindicated during breastfeeding in TCM, but no modern safety studies have been conducted. Avoid therapeutic doses during pregnancy; consult healthcare provider regarding use during lactation.
Adverse Effects
References
Monograph Sources
- [1] World Health Organization. WHO Monographs on Selected Medicinal Plants, Volume 3: Fructus Schisandrae Chinensis. World Health Organization, Geneva (2007) : 296-313
- [2] Hoffmann D. Medical Herbalism: The Science and Practice of Herbal Medicine. Healing Arts Press, Rochester, VT (2003) . ISBN: 978-0892817498
- [3] Gardner Z, McGuffin M (eds). American Herbal Products Association's Botanical Safety Handbook, 2nd Edition. CRC Press, Boca Raton, FL (2013) . ISBN: 978-1466516946
Clinical Studies
- [4] Ip SP, Mak DH, Li PC, Poon MK, Ko KM. Effect of a lignan-enriched fructus Schisandrae extract on hepatic glutathione status in rats: protection against carbon tetrachloride toxicity. Planta Med (2000) ; 66 : 521-524 . DOI: 10.1055/s-2000-8601 . PMID: 10985077
- [5] Aslanyan G, Amroyan E, Gabrielyan E, Nylander M, Wikman G, Panossian A. Double-blind, placebo-controlled, randomised study of single dose effects of ADAPT-232 on cognitive functions. Phytomedicine (2010) ; 17 : 494-499 . DOI: 10.1016/j.phymed.2010.02.005 . PMID: 20374974
- [6] Panossian A, Wikman G. Pharmacology of Schisandra chinensis Bail.: an overview of Russian research and uses in medicine. J Ethnopharmacol (2008) ; 118 : 183-212 . DOI: 10.1016/j.jep.2008.04.020 . PMID: 18515024
- [7] Panossian A, Wikman G. Evidence-based efficacy of adaptogens in fatigue, and molecular mechanisms related to their stress-protective activity. Curr Clin Pharmacol (2009) ; 4 : 198-219 . DOI: 10.2174/157488409789375311 . PMID: 19500070
- [8] Iwata H, Tezuka Y, Kadota S, Hiratsuka A, Watabe T. Identification and characterization of potent CYP3A4 inhibitors in Schisandra fruit extract. Drug Metab Dispos (2004) ; 32 : 1351-1358 . DOI: 10.1124/dmd.104.000646 . PMID: 15342467
- [9] Xin HW, Wu XC, Li Q, Yu AR, Zhong MY, Liu YY. The effects of Wuzhi tablet (Schisandra sphenanthera extract) on the pharmacokinetics of tacrolimus in renal transplant recipients. J Clin Pharmacol (2007) ; 47 : 1440-1446 . DOI: 10.1177/0091270007307572 . PMID: 17962428
Traditional Texts
- [10] Bensky D, Clavey S, Stoger E. Chinese Herbal Medicine: Materia Medica, 3rd Edition. Eastland Press, Seattle, WA (2004) . ISBN: 978-0939616428
- [11] Brekhman II, Dardymov IV. New substances of plant origin which increase nonspecific resistance. Annu Rev Pharmacol (1969) ; 9 : 419-430 . DOI: 10.1146/annurev.pa.09.040169.002223 . PMID: 4892434
Pharmacopeias & Reviews
- [12] National Pharmacopoeia Commission of China. Pharmacopoeia of the People's Republic of China, Volume I: Wuweizi (Schisandrae Chinensis Fructus). China Medical Science Press, Beijing (2020)
Last updated: 2026-03-01 | Status: published
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