Alstonia (Alstonia boonei): Benefits, Dosage, Safety & Evidence

Questions fréquentes

How does Alstonia boonei work against malaria?

Alstonia boonei contains indole alkaloids including echitamine, alstonine, and pleiocarpamine, which are believed to exert antimalarial activity through interference with Plasmodium parasite metabolism and potential inhibition of heme polymerization. Laboratory studies suggest these compounds may disrupt the parasite's life cycle, though the precise mechanism remains incompletely understood. Current evidence is limited to preclinical research (Evidence Level C), and rigorous clinical trials are needed to fully establish the mechanism of action.

Can Alstonia boonei interact with prescription medications?

Alstonia boonei may interact with cardiac medications due to its reported effects on heart function. The alkaloid content, including alstonine and echitamine, may potentiate or interfere with antihypertensive drugs and CNS-active medications. Patients taking prescription medications should consult a qualified healthcare provider before using Alstonia boonei, as pharmacokinetic interaction data remains limited. Professional guidance is strongly recommended for anyone on concurrent drug therapy.

What is the recommended dosage for Alstonia boonei bark?

Traditional preparations use 2–4 grams of dried bark as a decoction, or 1–2 mL of tincture taken once or twice daily. Dosage should be individualized based on the condition being treated and patient health status. Due to alkaloid toxicity risks at higher doses, self-medication is not recommended. A qualified medical herbalist or healthcare provider should determine appropriate dosing, as excessive amounts can cause serious adverse effects.

Is Alstonia boonei safe during pregnancy and breastfeeding?

Alstonia boonei is considered unsafe during pregnancy and should be strictly avoided. The alkaloid constituents may cross the placental barrier and pose risks to fetal development. Traditional contraindications explicitly exclude pregnant women from using this herb. Safety during breastfeeding has not been established, and use is not recommended. Women who are pregnant, planning pregnancy, or breastfeeding should not use Alstonia boonei under any circumstances.

What are the traditional uses of Alstonia boonei in West Africa?

Alstonia boonei bark is one of West Africa's most important antimalarial herbs, extensively used by Akan, Yoruba, and other West African peoples for treating malaria and reducing fever. Folk medicine applications also include management of hypertension and various febrile illnesses. The herb has a substantial ethnobotanical history across the region, though clinical evidence supporting these traditional uses remains limited (Evidence Level C). Modern research continues to investigate its therapeutic potential.

Fiche d'information compilée à partir de PubMed

Cette fiche a été compilée à partir de résumés PubMed (NIH) avec l'assistance d'une IA. Chaque affirmation factuelle est citée par un article PubMed réel (voir la liste des sources). Elle n'a pas encore été révisée par un humain — confirmez auprès d'un professionnel de santé avant utilisation.

Compilé à partir de 30 articles PubMed · modèle : gemma4:31b

Résumé

Alstonia boonei is a medicinal plant from the Apocynaceae family widely used in Africa and Asia for treating conditions such as malaria, fever, and inflammatory disorders [PMID:37894548, PMID:41510729].

Contexte

Alstonia boonei (De Wild) is a plant belonging to the Apocynaceae family, primarily utilized in West and Central Africa [PMID:37894548, PMID:41510729].

Usages traditionnels

Traditionally used in West and Central Africa to manage malaria, fever, intestinal worms, rheumatism, hypertension, and as muscle relaxants [PMID:37894548, PMID:41510729]. It is also used folklorically for the management of cataracts [PMID:37560323] and for treating symptoms of cerebral malaria in southwest Nigeria [PMID:36965546].

Composés actifs

Bioactive compounds identified include alkaloids (such as alstoboonine, 15-hydroxyangustilobine A, and various indole alkaloids), saponins, tannins, terpenes, phenolic compounds, and glycosides [PMID:41510729, PMID:37942619, PMID:24019574]. Specifically, 2-methyl-3-propylbutane-1,4-diol has been isolated from the stem-bark [PMID:36323654].

Mécanisme d'action

Mechanisms include the inhibition of digestive enzymes such as lipase, α-amylase, and α-glucosidase [PMID:37864233, PMID:40999897], and antispasmodic activity on rat ileum contractions [PMID:37894548]. It also demonstrates antioxidant potential and the ability to suppress pro-inflammatory mediators [PMID:36965546, PMID:36158881].

Preuves cliniques

Preuve DMalaria

Leaf and root extracts demonstrated antiplasmodial potentials in mice models, with effects being dosage and duration-dependent [PMID:34394229, PMID:34659429].

Preuve DDiabetes

Butanol fraction of leaves reduced blood glucose levels, enhanced oral glucose tolerance, and restored insulin secretion in diabetic rats [PMID:33840309]. Stem bark aqueous extract also normalized blood glucose in diabetic mice [PMID:40999897].

Preuve DInflammation/Arthritis

Aqueous fraction of leaves suppressed carrageenan- and formaldehyde-induced rat paw edema [PMID:27974282].

Preuve DCataract

Aqueous stem bark extract exhibited anticataract activity in Sprague Dawley rat models of diabetic and age-related cataracts [PMID:37560323].

Preuve DUlcerative Colitis

Aqueous and methanol stem-bark extracts were assessed for anticolitis effects in DSS-induced intestinal colitis models [PMID:32565862].

Preuve D

Sécurité et effets indésirables

Acute toxicity tests of green-synthesized nanoparticles from A. boonei showed high safety (LD50 above 5000 mg/kg for silver nanoparticles) [PMID:41230271].

Synthèse des preuves

The current evidence is primarily based on in vitro studies and in vivo animal models (rats/mice), indicating strong pharmacological potential for antimalarial, anti-diabetic, and anti-inflammatory activities, but lacks human clinical trial data.

Sources PubMed

1.PMID: 37894548 (2023) — Antispasmodic Effect of Alstonia boonei De Wild. and Its Constituents: Ex Vivo and In Silico Approaches. · Molecules (Basel, Switzerland)
2.PMID: 36323654 (2023) — In vitro effects of 2-methyl-3-propylbutane-1,4-diol purified from Alstonia boonei on erythrocyte membrane stabilization and mitochondrial membrane permeabilization. · Chemical biology & drug design
3.PMID: 36965546 (2023) — Neuroprotection by Alstonia boonei De Wild., Anacardium occidentale L., Azadirachta indica A.Juss. and Mangifera indica L. · Journal of ethnopharmacology
4.PMID: 37864233 (2023) — Phytochemical analysis, in vitro and in silico effects from Alstonia boonei De Wild stem bark on selected digestive enzymes and adipogenesis in 3T3-L1 preadipocytes. · BMC complementary medicine and therapies
5.PMID: 37560323 (2023)

Alstonia

Sources et citations

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