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Medical Disclaimer: This information is for educational purposes only and is not a substitute for professional medical advice.
Non-Standardized Plant Allergenic Extract [EPC]
Chaste Tree Fruit (Vitex agnus-castus) is a botanical agent classified as a Non-Standardized Plant Allergenic Extract, frequently utilized for hormonal regulation, including PMS and menopausal symptoms, through its modulation of dopamine and prolactin levels.
Name
Chaste Tree Fruit
Raw Name
CHASTE TREE FRUIT
Category
Non-Standardized Plant Allergenic Extract [EPC]
Drug Count
48
Variant Count
55
Last Verified
February 17, 2026
About Chaste Tree Fruit
Chaste Tree Fruit (Vitex agnus-castus) is a botanical agent classified as a Non-Standardized Plant Allergenic Extract, frequently utilized for hormonal regulation, including PMS and menopausal symptoms, through its modulation of dopamine and prolactin levels.
Detailed information about Chaste Tree Fruit
References used for this content
This page is for informational purposes only and does not replace medical advice. Consult a qualified healthcare professional before using any medication containing Chaste Tree Fruit.
Chaste Tree Fruit, derived from the berries of the Vitex agnus-castus plant, is a complex botanical substance that has been utilized in clinical and traditional medicine for centuries. In modern pharmacology, it is classified under the therapeutic category of Non-Standardized Plant Allergenic Extract [EPC], though it also holds secondary classifications such as Estrogen [EPC] and Progesterone [EPC] due to its profound influence on the endocrine system. While it is often recognized as a dietary supplement in the United States under the Dietary Supplement Health and Education Act (DSHEA), it is regulated as a pharmaceutical-grade medication in several European countries (such as Germany, where it is approved by Commission E for the treatment of menstrual cycle irregularities and mastodynia).
Pharmacologically, Chaste Tree Fruit is not a hormone itself; rather, it acts as a modulator of the hypothalamic-pituitary-ovarian axis. It is primarily known for its dopaminergic properties, specifically its ability to bind to dopamine D2 receptors in the anterior pituitary gland. By mimicking the action of dopamine, it inhibits the secretion of prolactin, a hormone that, when elevated, can disrupt the menstrual cycle and lead to breast tenderness. This unique mechanism makes it a cornerstone in the management of premenstrual syndrome (PMS), premenstrual dysphoric disorder (PMDD), and certain types of infertility associated with luteal phase defects.
At the molecular level, Chaste Tree Fruit contains a diverse array of bioactive compounds, including iridoid glycosides (such as agnuside and aucubin), flavonoids (such as casticin), and diterpenes (such as rotundifuran and vitexilactone). The most critical mechanism of action involves the diterpenes, which demonstrate high affinity for Dopamine D2 receptors. By binding to these receptors in the lactotrophic cells of the pituitary gland, Chaste Tree Fruit suppresses the synthesis and release of prolactin.
In patients with latent hyperprolactinemia (a condition where prolactin levels are slightly elevated, particularly under stress), the reduction of prolactin helps normalize the secretion of Follicle-Stimulating Hormone (FSH) and Luteinizing Hormone (LH). This normalization is essential for the proper development of the corpus luteum, which in turn ensures adequate production of progesterone during the second half of the menstrual cycle. Additionally, some constituents of Chaste Tree Fruit have shown the ability to bind to Opioid Receptors (mu and kappa), which may explain its mild analgesic and mood-stabilizing effects during the luteal phase. Unlike synthetic hormones, Chaste Tree Fruit works by encouraging the body's own endocrine system to reach a state of equilibrium.
Understanding the pharmacokinetics of a botanical extract is challenging due to the multi-component nature of the substance. However, clinical studies focusing on the marker compound agnuside provide significant insights:
Chaste Tree Fruit is utilized for a variety of conditions related to the female reproductive system. While the FDA classifies it as an allergenic extract in certain contexts, its clinical utility is most recognized in the following areas:
Chaste Tree Fruit is available in several formulations, each with varying degrees of standardization:
> Important: Only your healthcare provider can determine if Chaste Tree Fruit is right for your specific condition. Because it affects hormone levels, a professional diagnosis of the underlying hormonal imbalance is essential before starting treatment.
Dosage for Chaste Tree Fruit varies significantly depending on the concentration of the extract and the specific condition being treated. For standardized extracts (often referred to as BNO 1095 or Ze 440 in clinical literature), the following ranges are typical:
Chaste Tree Fruit is generally not recommended for use in prepubescent children. For adolescent patients (ages 12-18) suffering from severe menstrual irregularities or hormonal acne, a healthcare provider may prescribe a reduced dose, typically starting at 20 mg daily. However, because the endocrine system is still developing during puberty, medical supervision is mandatory to prevent premature closure of epiphyseal plates or other developmental disruptions.
Data regarding Chaste Tree Fruit in patients with kidney disease is limited. Since metabolites are primarily excreted renally, patients with a GFR (Glomerular Filtration Rate) below 30 mL/min should use this supplement with extreme caution and under strict medical monitoring.
As the liver is the primary site of metabolism for the flavonoids and diterpenes found in Vitex, patients with hepatic cirrhosis or elevated liver enzymes may experience increased systemic exposure. Dose reductions of 50% may be necessary for those with moderate hepatic impairment (Child-Pugh Class B).
Geriatric patients using Chaste Tree Fruit for menopausal symptoms do not typically require dose adjustments based on age alone. However, the increased prevalence of polypharmacy in the elderly necessitates a thorough review of potential drug-drug interactions, particularly with medications for Parkinson's disease or cognitive decline.
To achieve the best clinical outcomes and minimize side effects, follow these administration guidelines:
If you miss a dose, take it as soon as you remember. If it is almost time for your next scheduled dose, skip the missed dose and resume your regular schedule. Do not double the dose to make up for a missed one, as this increases the risk of acute dopaminergic side effects such as nausea or dizziness.
Acute overdose of Chaste Tree Fruit is rarely life-threatening but can cause significant discomfort. Signs of overdose include:
In the event of a suspected overdose, contact your local poison control center or seek emergency medical attention. Treatment is generally supportive, focusing on gastric lavage if the ingestion was recent and maintaining hydration.
> Important: Follow your healthcare provider's dosing instructions. Do not adjust your dose without medical guidance, as even small changes can significantly impact your hormonal balance.
While Chaste Tree Fruit is generally well-tolerated, some individuals may experience mild adverse reactions as the body adjusts to shifting hormone levels. Common side effects include:
> Warning: Stop taking Chaste Tree Fruit and call your doctor immediately if you experience any of these serious reactions:
Prolonged use of Chaste Tree Fruit (longer than 6-12 months) has not been extensively studied in large-scale clinical trials. Potential long-term concerns include:
No FDA black box warnings currently exist for Chaste Tree Fruit. However, it is important to note that because it is often sold as a supplement, the rigorous post-market surveillance required for prescription drugs is not always applied. Patients should remain vigilant and report any unusual symptoms to their healthcare provider immediately.
Report any unusual symptoms to your healthcare provider. Clinical monitoring of hormone levels (Prolactin, FSH, LH) is recommended for patients on long-term therapy.
Chaste Tree Fruit is a potent endocrine modulator. It should not be viewed as a simple "herbal tea" but as a pharmacologically active substance that can significantly alter the body's internal chemistry. Patients must be aware that botanical extracts can have the same risks and drug interactions as synthetic medications. It is vital to confirm that your symptoms are due to a hormonal imbalance and not a more serious underlying condition, such as a pituitary tumor or ovarian cyst, before beginning therapy.
At this time, there are no FDA black box warnings for Chaste Tree Fruit. It is categorized as a Non-Standardized Plant Allergenic Extract, which carries a lower regulatory profile than high-risk pharmaceuticals like opioids or certain antidepressants. However, the lack of a black box warning does not imply absolute safety.
As a plant-based extract, Chaste Tree Fruit carries an inherent risk of allergic sensitization. Patients with known allergies to plants in the Verbenaceae family (such as Verbena or Lemon Verbena) should avoid this product. Anaphylaxis, while rare, is a medical emergency characterized by airway constriction and cardiovascular collapse.
Chaste Tree Fruit may have estrogenic effects or influence the progesterone-to-estrogen ratio. Therefore, it is strictly contraindicated or requires extreme caution in patients with history of:
Because the primary site of action is the pituitary gland, individuals with pituitary tumors (prolactinomas) or other structural abnormalities of the sella turcica must avoid Chaste Tree Fruit unless specifically directed by an endocrinologist. It can mask the symptoms of a growing tumor by artificially lowering prolactin levels.
Due to its dopaminergic activity, Chaste Tree Fruit can interact with the brain's reward and mood pathways. Patients with a history of schizophrenia, bipolar disorder, or severe clinical depression should use this agent only under the close supervision of a psychiatrist.
To ensure safety and efficacy, healthcare providers may require the following monitoring:
Chaste Tree Fruit may cause dizziness or lightheadedness in some individuals, particularly during the first week of treatment. Patients should assess their reaction to the medication before driving a vehicle or operating heavy machinery. If vertigo occurs, these activities should be avoided until the symptom resolves.
There are no known direct chemical interactions between Chaste Tree Fruit and alcohol. However, alcohol can exacerbate the gastrointestinal side effects and dizziness associated with Vitex. Furthermore, excessive alcohol consumption can disrupt the very hormonal balance that Chaste Tree Fruit is intended to correct. It is generally advised to limit alcohol intake during treatment.
Chaste Tree Fruit does not typically require a tapering period. However, sudden discontinuation after long-term use (over 6 months) may result in a "rebound" effect where prolactin levels spike, leading to a return of PMS symptoms or breast tenderness. If you wish to stop taking the supplement, discuss a gradual reduction with your doctor.
> Important: Discuss all your medical conditions with your healthcare provider before starting Chaste Tree Fruit. A complete medical history is the best defense against adverse reactions.
Certain medications must NEVER be combined with Chaste Tree Fruit due to the high risk of severe pharmacological antagonism or toxicity:
Chaste Tree Fruit can significantly impact the results of several clinical lab tests:
The primary mechanisms for these interactions are Pharmacodynamic (acting on the same receptor sites, such as D2) and Pharmacokinetic (potential induction of CYP3A4 enzymes, which may speed up the clearance of other drugs).
> Important: Tell your doctor about ALL medications, supplements, and herbal products you are taking. A comprehensive drug-herb interaction screen is vital for your safety.
Chaste Tree Fruit must NEVER be used in the following circumstances:
Conditions requiring a careful risk-benefit analysis by a physician include:
Patients with a known hypersensitivity to any member of the Verbenaceae family are at an increased risk of cross-allergic reactions. This includes plants such as:
Symptoms of cross-sensitivity may include contact dermatitis from handling the fruit or systemic urticaria (hives) upon ingestion.
> Important: Your healthcare provider will evaluate your complete medical history, including any history of hormone-related illness, before prescribing Chaste Tree Fruit.
Chaste Tree Fruit is generally classified as Category C (by traditional herbal standards, as no FDA category exists). Animal studies have shown conflicting results regarding its effect on the uterus. There is a theoretical risk that the herb could cause uterine contractions or interfere with the corpus luteum's ability to support early pregnancy. Therefore, it is standard clinical practice to discontinue Chaste Tree Fruit as soon as a pregnancy is confirmed.
The use of Chaste Tree Fruit during lactation is highly controversial. Because it is a dopamine agonist that suppresses prolactin, it may significantly decrease milk production. Historically, it was used to help women stop breastfeeding (weaning). Unless specifically directed by a lactation consultant or physician to treat a specific condition, it should be avoided by nursing mothers who wish to maintain their milk supply.
Chaste Tree Fruit is not approved for use in children under the age of 12. In older adolescents, it is sometimes used for primary dysmenorrhea (painful periods) or acne. However, the potential for long-term alterations in the developing endocrine system means it should only be used for short durations (3-6 months) under pediatric endocrine supervision.
In women over the age of 65, Chaste Tree Fruit is occasionally used to manage post-menopausal symptoms. The primary concerns in this population are:
There are no specific guidelines for GFR-based dosing. However, clinical pharmacologists recommend a cautious approach:
For patients with liver disease, the metabolism of flavonoids like casticin may be impaired.
> Important: Special populations require individualized medical assessment. Never start this supplement if you fall into one of these categories without professional consultation.
Chaste Tree Fruit operates through a multi-target pharmacological approach. The primary mechanism is Dopaminergic Agonism. The diterpenes (specifically rotundifuran and 6β,7β-diacetoxy-13-hydroxy-8,14-labdadien) bind to the Dopamine D2 receptors on the lactotrophic cells of the anterior pituitary. This binding inhibits the release of prolactin.
Secondary mechanisms include:
| Parameter | Value |
|---|---|
| Bioavailability | Estimated 40-60% (for diterpenes) |
| Protein Binding | Approximately 70-85% |
| Half-life | 1.5 - 3 hours (Agnuside) |
| Tmax | 1.2 hours |
| Metabolism | Hepatic (CYP3A4 involvement suspected) |
| Excretion | Renal (60%), Fecal (30%), Other (10%) |
Chaste Tree Fruit is classified as a Non-Standardized Plant Allergenic Extract [EPC]. It is also functionally grouped with Dopamine Agonists and Phyto-progestins due to its physiological effects. It is related to other botanical endocrine modulators like Black Cohosh (Actaea racemosa) and Red Clover (Trifolium pratense).
Medications containing this ingredient
Common questions about Chaste Tree Fruit
Chaste Tree Fruit is primarily used to treat symptoms associated with hormonal imbalances in women, such as Premenstrual Syndrome (PMS), Premenstrual Dysphoric Disorder (PMDD), and cyclical breast pain (mastodynia). It works by modulating the pituitary gland to lower prolactin levels and balance the ratio of progesterone to estrogen. Additionally, it is often utilized to regulate irregular menstrual cycles and may help improve fertility in women with a shortened luteal phase. Some healthcare providers also recommend it for managing hormonal acne and certain symptoms of menopause, such as hot flashes. It is important to consult a doctor to ensure your symptoms are truly hormonal before starting treatment.
The most common side effects reported by users of Chaste Tree Fruit include gastrointestinal issues such as nausea, stomach upset, and bloating. Some individuals also experience mild headaches, dizziness, or temporary changes in their menstrual flow during the first few months of use. Skin reactions, including minor rashes or a temporary increase in acne, have also been noted as the body adjusts to the herbal extract. Most of these side effects are mild and tend to resolve on their own within a few weeks of consistent use. However, if you experience severe allergic reactions like hives or difficulty breathing, you should seek immediate medical attention.
While there is no known direct chemical interaction between alcohol and Chaste Tree Fruit, it is generally advised to limit alcohol consumption while taking this supplement. Alcohol can worsen some of the herb's side effects, such as dizziness, headaches, and gastrointestinal upset. Furthermore, alcohol is known to disrupt the endocrine system and can interfere with the hormonal balancing effects that Chaste Tree Fruit is intended to provide. For the best results in managing PMS or fertility, maintaining a stable internal environment is key. Always discuss your lifestyle habits, including alcohol use, with your healthcare provider when starting a new clinical regimen.
Chaste Tree Fruit is generally not recommended for use during pregnancy. Because it significantly affects hormone levels—specifically by lowering prolactin and potentially altering progesterone—there is a theoretical risk that it could interfere with the natural hormonal progression required to maintain a healthy pregnancy. Most clinical guidelines suggest discontinuing the use of Vitex as soon as a pregnancy is confirmed or even when you begin actively trying to conceive if you are under the care of a fertility specialist. There is insufficient data to guarantee fetal safety, so it is best to err on the side of caution. Always consult your obstetrician regarding any supplements you were taking prior to becoming pregnant.
Chaste Tree Fruit is not a fast-acting medication; it requires a cumulative effect to alter the body's hormonal signaling. Most patients will need to take the supplement consistently for at least two to three full menstrual cycles (approximately 8 to 12 weeks) before noticing a significant reduction in symptoms like PMS or breast tenderness. Some initial changes in cycle length or mood may be felt within the first month, but the full therapeutic benefit is usually reached after three months of daily administration. If you do not see any improvement after four months, your healthcare provider may suggest re-evaluating your diagnosis or adjusting the dosage. Patience and consistency are essential when using botanical endocrine modulators.
Yes, you can generally stop taking Chaste Tree Fruit suddenly without experiencing dangerous withdrawal symptoms, as it is not an addictive substance. However, because it works by suppressing prolactin and balancing hormones, stopping it abruptly after long-term use may cause a 'rebound' effect. This could lead to a sudden return of the symptoms you were treating, such as severe PMS, breast pain, or irregular periods, as your body's prolactin levels rise again. If you have been taking it for more than six months, some practitioners recommend gradually reducing the dose over a few weeks to allow your pituitary gland to adjust. Always discuss your discontinuation plan with your doctor to manage any returning symptoms.
If you miss a dose of Chaste Tree Fruit, you should take it as soon as you remember that day. However, if it is already the next day and close to the time for your next scheduled dose, you should skip the missed dose entirely and continue with your regular routine. Do not take two doses at once to make up for the one you missed, as this could increase the likelihood of experiencing side effects like nausea or dizziness. Consistency is very important for hormonal regulation, so try to take your supplement at the same time each morning. Setting a daily alarm or using a pill organizer can help you stay on track with your treatment plan.
Weight gain is not a common side effect of Chaste Tree Fruit, but it has been reported by a small number of women. This weight change is usually minimal (often 2 to 5 pounds) and is typically attributed to changes in fluid retention rather than an increase in body fat. Because the herb increases progesterone levels, some women may experience slight bloating or water weight similar to what occurs naturally during the luteal phase of the menstrual cycle. In many cases, Chaste Tree Fruit actually helps reduce the significant bloating and water retention associated with PMS, leading to a perceived weight loss for some. If you notice rapid or significant weight gain, you should consult your doctor to rule out other causes.
Chaste Tree Fruit can interact with several types of medications, particularly those that affect dopamine or hormones. It should not be taken with antipsychotic drugs (dopamine antagonists) or medications for Parkinson's disease (dopamine agonists), as it can interfere with their effectiveness or increase side effects. There is also a potential interaction with birth control pills and hormone replacement therapy, as the herb may decrease the efficacy of these hormonal treatments. Additionally, it may interact with medications like metoclopramide. Because of these risks, it is vital to provide your healthcare provider with a full list of all prescription and over-the-counter medications you are currently taking before starting Chaste Tree Fruit.
Since Chaste Tree Fruit is a botanical extract and not a synthetic drug, the concept of 'generic' vs. 'brand name' works differently than with standard pharmaceuticals. It is available from a wide variety of manufacturers as a dietary supplement under its common name or its botanical name, *Vitex agnus-castus*. However, not all products are created equal; clinical studies usually utilize specific standardized extracts that guarantee a certain percentage of active compounds like agnuside. While you can find many affordable versions, it is best to choose a product that has been third-party tested for purity and potency. Your pharmacist or doctor can recommend a high-quality, standardized brand that matches the dosages used in clinical research.