# Plant Monograph: Pygeum Bark
**Name of plant:**
Pygeum Bark
**Catch phrase (Carmina Gadelica or traditional invocation if available):**
No *Carmina Gadelica* or traditional European invocation is recorded for pygeum. A modern poetic formulation is: **“Rooted in the southern earth, let the waterway run clear.”** This is not a historical invocation.
**Family:**
Rosaceae — the rose family
**Genus and species:**
*Prunus africana* (Hook.f.) Kalkman
**Other names:**
* African cherry
* African plum
* African prune
* African pygeum
* Bitter almond
* Red stinkwood
* *Prunus africana*
* *Pygeum africanum* — former botanical name
* African cherry laurel
* Pygeum
* Pygeum africanum bark
* Prunus africana bark
* African plum tree
**Brief introduction:**
Pygeum is the dried bark of *Prunus africana*, a large evergreen tree native to the mountainous regions of sub-Saharan Africa and Madagascar. The tree can become very large, with dark bark and glossy evergreen leaves, and occurs naturally in montane and Afromontane forests.
The bark has a long history of traditional medicinal use in several African regions. During the twentieth century it became particularly well known in European phytotherapy for **lower urinary tract symptoms associated with benign prostatic hyperplasia (BPH)**.
The medicinal material is unusual in that the bark, rather than the fruit or leaves, is the principal harvested part. Because excessive bark harvesting can kill the tree, *P. africana* has become an important conservation concern.
**Traditional uses:**
* Used traditionally for urinary difficulties and impaired urination
* Employed for complaints interpreted as inflammation or disorders of the urinary tract
* Traditionally used for prostate and bladder complaints in some African medical traditions
* Used traditionally for stomach and gastrointestinal complaints
* Employed in various regions for fever, general inflammatory complaints, and other ailments
**Historical use:**
* Indigenous African communities used preparations of *Prunus africana* bark for urinary and genitourinary complaints
* Traditional preparations included decoctions and infusions of bark
* European interest in pygeum increased during the nineteenth and twentieth centuries after reports of its traditional use
* By the mid-twentieth century, standardized pygeum extracts were being investigated and marketed in European phytotherapy for prostate complaints
* Pygeum subsequently became one of the best-known African herbal medicines associated with benign prostatic hyperplasia
**Parts used and method of use:**
* Inner bark
* Dried bark extract
Used as:
* Bark decoction
* Traditional aqueous infusion
* Powdered bark
* Standardized lipophilic bark extract in modern herbal medicine
**Use in healing (modern herbal practice):**
* Traditionally and clinically investigated for symptoms of benign prostatic hyperplasia
* Used to reduce urinary frequency and nocturia associated with lower urinary tract symptoms
* Used to support urinary flow and reduce difficulty initiating urination
* Traditionally described as having anti-inflammatory activity in the prostate and urinary tract
* Investigated for effects on bladder function and prostatic secretions
Modern evidence suggests that standardized pygeum extracts **may provide modest improvement in urinary symptoms associated with BPH**, although the clinical literature is older and less extensive than that for some conventional BPH medicines. Pygeum should not be regarded as a treatment that prevents or cures prostate cancer.
**Pharmacology and biochemistry:**
* **Phytosterols**, including β-sitosterol
* **Pentacyclic triterpenes**, including ursolic and oleanolic acids
* **Ferulic acid derivatives and other phenolic compounds**
Mechanisms:
* Anti-inflammatory effects may involve reduction of inflammatory mediators and inhibition of inflammatory pathways
* Phytosterols and related constituents may influence androgen-associated prostatic activity and cellular signalling
* Experimental evidence suggests effects on bladder smooth muscle, prostatic secretions, and urinary tract inflammatory processes
Overall profile: Pygeum bark is principally a **urinary and prostate-supportive botanical**. Standardized extracts have demonstrated anti-inflammatory and other biological activities in laboratory studies and modest clinical benefits for some BPH-related lower urinary tract symptoms. The evidence is considerably stronger for symptom management than for altering the underlying progression of prostate disease.
**Common dosage:**
* **Standardized pygeum bark extract:** commonly 50 mg twice daily of an extract standardized to approximately 13% total sterols and 0.5% triterpenes
* **Alternative standardized extract:** approximately 100 mg/day, depending on the extraction ratio and standardization
* **Dried bark powder:** traditional preparations vary considerably; no reliably equivalent modern dose can be established
* **Bark decoction:** traditional preparations vary by source and concentration and should not be equated directly with standardized extracts
**Safety factors (including side effects):**
* Standardized extracts are generally considered reasonably well tolerated over studied periods
* Possible adverse effects include gastrointestinal upset, nausea, abdominal discomfort, constipation, or diarrhea
* Anyone with urinary obstruction, blood in the urine, severe urinary pain, or acute urinary retention should seek medical evaluation rather than self-treating with pygeum
* Allergic reactions are possible, particularly in people sensitive to plants in the Rosaceae family
* Long-term safety data are more limited than the extensive safety data available for conventional BPH medicines; prolonged use should therefore be monitored
**First aid / adverse reaction response:**
* **Mild gastrointestinal upset:** discontinue or reduce the preparation and monitor; seek advice if symptoms persist
* **Vomiting or severe abdominal symptoms:** discontinue use and obtain medical assessment if symptoms are persistent or severe
* **Allergic rash, swelling, or itching:** discontinue use and seek medical advice
* **Difficulty breathing, facial swelling, or collapse:** seek emergency medical attention immediately
**Drug interactions:**
* Possible additive effects with other medicines used for **lower urinary tract symptoms or BPH**, although clinically significant interactions have not been firmly established
* Theoretical interaction with medications affecting androgen-related pathways cannot be excluded
* Because experimental studies suggest anti-inflammatory and metabolic effects, interactions with other pharmacologically active botanical preparations are theoretically possible
* General interaction consideration: people taking prescription medicines for prostate disease, urinary disorders, or multiple chronic conditions should discuss standardized pygeum extract with a healthcare professional before prolonged use
**Horticultural requirements:**
* **USDA / Canadian zone:** Approximately USDA Zones 9–11; not reliably winter-hardy in most of Canada
* **Soil pH:** Approximately 5.5–7.0; prefers fertile, well-drained forest soils
* **Light requirements:** Partial shade to full sun; young trees benefit from protection from intense exposure
* **Moisture:** Moderate to high; prefers consistently moist but well-drained soil
* **Other notes (growth habit, harvest timing, etc.):**
* **Growth habit:** Large evergreen African tree capable of reaching approximately 30–40 m in favourable natural conditions
* **Flowering/fruiting:** Small white flowers occur in clusters; fruits mature from green to reddish-purple or dark purple
* **Harvest timing:** Medicinal bark may be harvested from mature trees, but sustainable harvesting is essential
* **Habitat:** Montane and Afromontane forests, generally at moderate to high elevations
* **Propagation/cultivation notes:** Propagated primarily by seed, although germination can be slow. Cultivation outside its native environment is difficult because of its ecological requirements. **Ring-barking or excessive removal of bark can kill the tree**, making sustainable harvesting especially important.
**Sampling of clinical reports / studies:**
* **Clinical study or report:** Randomized and controlled clinical studies of standardized pygeum extracts have reported modest improvements in urinary symptoms, nocturia, residual urine volume, and urinary flow in men with BPH
* **Pharmacological study:** Experimental studies demonstrate anti-inflammatory activity and effects on prostatic and urinary tract physiology
* **Phytochemical study:** Pygeum bark contains phytosterols, triterpenes, phenolic compounds, ferulic acid derivatives, and other constituents; the precise active principle remains uncertain
* **Ethnobotanical evidence:** Traditional African use includes urinary, genitourinary, gastrointestinal, and inflammatory applications, with urinary/prostate use becoming particularly prominent in modern phytotherapy
* **Overall assessment of evidence:** **Moderate evidence for modest symptomatic relief of BPH-associated lower urinary tract symptoms, but insufficient evidence to claim disease prevention or cure.** Pygeum is best regarded as a traditional and complementary urinary/prostate remedy rather than a substitute for medical evaluation of prostate symptoms.
Educational Use Only: The information presented on this page is provided for educational, historical, and informational purposes only. ArdNemeton na Tuatha and Bhùth Draoi do not provide medical advice. Always consult your physician and pharmacist before using any herb, mushroom, supplement, or botanical product for medicinal purposes. Traditional uses described herein do not constitute medical claims.