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PubMed · Newbouldia laevis improved glucose and fat homeostasis in a TYPE-2 diabesity mice model. (2020)
PubMed · Pharmacognostic profiles, evaluation of analgesic, anti-inflammatory and anticonvulsant activities of Newbouldia laevis (P. Beauv.) Seem. ex Bureau leaf and root extracts in Wistar rats. (2023)
Révisé par : HerbAlly Editorial Team, Medical herbalists and healthcare professionals
Dernière mise à jour : April 2026
Calculer une dose sûre de Newbouldia Laevis
Calculateur gratuit de posologie — doses adultes et enfants selon le poids.
Newbouldia laevis contains bioactive compounds including alkaloids, iridoids, and lapachol that may exert anticonvulsant effects through modulation of GABAergic neurotransmission. Laboratory studies suggest these compounds may enhance GABA activity in the central nervous system, potentially reducing neuronal excitability associated with seizures. Additionally, the antioxidant properties of quercetin and other flavonoids present in the plant may protect against oxidative stress-induced neuronal damage. However, the exact mechanism remains poorly understood and requires further investigation. Evidence Level: C (preliminary studies).
Does Newbouldia laevis interact with medications?
Newbouldia laevis may interact with anticonvulsant medications, potentially altering their effectiveness. The plant contains compounds that affect the central nervous system and may enhance the sedative effects of medications such as benzodiazepines, barbiturates, and other CNS depressants. Additionally, lapachol present in the bark may affect blood clotting, potentially interacting with anticoagulant or antiplatelet medications. Patients taking antiepileptic drugs, blood thinners, or sedatives should consult a healthcare provider before using Newbouldia laevis. Evidence Level: C (theoretical interactions based on constituent properties).
What is the recommended dosage of Newbouldia laevis?
Traditional preparations of Newbouldia laevis typically use a bark decoction of approximately 200 mL taken twice daily for adults. The bark is boiled in water for 15-20 minutes to extract active compounds. For wound healing, the leaves or bark may be applied topically as a poultice. Standardized commercial preparations are limited, so dosing varies considerably. Due to insufficient clinical evidence establishing safe therapeutic ranges, users should follow traditional practitioner guidance and avoid self-medication. Children should only use this herb under professional supervision. Evidence Level: Traditional.
Is Newbouldia laevis safe during pregnancy?
Newbouldia laevis is considered unsafe during pregnancy and should be avoided. Traditional use includes abortifacient properties, and the plant contains uterine-stimulating compounds that may cause uterine contractions, potentially leading to miscarriage or premature labor. Animal studies have shown reproductive toxicity at certain doses. Breastfeeding women should also avoid this herb due to insufficient safety data and potential transfer of active compounds through breast milk. Women of childbearing age should use reliable contraception while using this herb. Evidence Level: C (based on traditional use and preliminary animal studies).
What are the health benefits of Newbouldia laevis?
Newbouldia laevis has been used traditionally in West and Central African medicine for treating epilepsy, fever, skin diseases, toothache, and promoting wound healing. The plant demonstrates antimicrobial, anti-inflammatory, and antioxidant properties in laboratory studies. The bark and leaves are most commonly used, containing active compounds such as lapachol, quercetin, alkaloids, and tannins. While ethnobotanical evidence supports these traditional applications, human clinical trials are lacking. Current evidence is insufficient to confirm therapeutic efficacy for any specific condition. Evidence Level: C (preliminary pharmacological studies and traditional use).
What are the side effects of Newbouldia laevis?
Reported side effects of Newbouldia laevis include nausea and drowsiness, particularly when taken internally. The CNS-depressant effects may cause sedation, dizziness, and impaired coordination, affecting ability to drive or operate machinery. Some users report gastrointestinal discomfort, including stomach upset and diarrhea. Allergic skin reactions may occur with topical application. Long-term safety data is lacking. Due to potential toxicity at higher doses, users should adhere to recommended preparations and discontinue use if adverse effects occur. Evidence Level: C (based on traditional use reports and preliminary studies).
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
Newbouldia laevis is a woody tropical plant found in southwest Nigeria used in traditional medicine for various CNS disorders, pain, and metabolic issues [PMID:31759112, 37211190].
Contexte
Newbouldia laevis (Bignoniaceae) is a woody tropical plant commonly found in southwest Nigeria [PMID:31759112].
Usages traditionnels
In Nigeria, leaves and roots are used for pain, inflammation, convulsion, and epilepsy [PMID:37211190]. It is applied in the management of CNS disorders such as psychosis, insomnia, convulsions, anxiety, and depression [PMID:31759112], and has long-standing use in managing diabetes mellitus [PMID:31926312]. In Togo, it is cited for the treatment of malaria [PMID:27114686], and in Benin, it is used by farmers to treat digestive helminths in small ruminants [PMID:21960378]. It is also used in some African countries to treat problems associated with infertility and childbirth [PMID:37438649].
Composés actifs
Identified compounds include caffeic acid glycosides (Newboulasides A and B) [PMID:32720525], phenylethanoid glycosides (newbouldiosides A-F) [PMID:33157560, 16497346, 9041716], pyrazole alkaloids (withasomnine, newbouldine) [PMID:25348466], and naphthoquinone-anthraquinone coupled pigments (newbouldiaquinone A) [PMID:16442576, 15930769]. Other constituents include flavonoids, tannins, terpenes, steroidal and cardiac glycosides, oleanolic acid, canthic acid, lapachol, and beta-sitosterol [PMID:20161915, 17718200, 15930769].
Mécanisme d'action
The antidiabetic effect may be mediated through the inhibition of $\alpha$-amylase enzyme activity [PMID:32720525].
Preuves cliniques
Preuve DDiabetes/Obesity
Ethanol leaf extract (butanol fraction) improved glucose and fat homeostasis in a type-2 diabesity mice model [PMID:31926312]
Preuve DAnxiety and Depression
Hydroethanol leaf extract exhibited anxiolytic and antidepressant-like activities in mice [PMID:31759112]
Preuve DPain and Inflammation
Methanol leaf and root extracts showed analgesic and anti-inflammatory activities in Wistar rats [PMID:37211190]
Preuve DConvulsions
Methanol leaf and root extracts showed anticonvulsant activities in Wistar rats [PMID:37211190]
Preuve DInsomnia/Sedation
Methanolic leaf extract caused reductions in exploratory and motor activity and prolonged pentobarbital-induced hypnosis in rats/mice [PMID:12577520]
Preuve DInfections (Antimicrobial)
Methanolic extracts showed in vitro activity against various Gram-positive and Gram-negative bacteria and Candida species [PMID:17718200, 20161915]
Sécurité et effets indésirables
Aqueous leaf extract was found to be mutagenic in the Ames Salmonella fluctuation test and SOS Chromotest, and induced chromosomal aberrations and root growth inhibition in Allium cepa models [PMID:37438649, 19619631]. However, methanol leaf and root extracts were tested for acute toxicity in Wistar rats at a maximum dose of 2000 mg/kg (orally) [PMID:37211190].
Interactions médicamenteuses
Newbouldia laevis extracts inhibited CYP450 enzyme activities, specifically CYP1A2, CYP2C9, and CYP2C19, with a time-dependent inhibition (TDI) effect observed on CYP1A2 [PMID:27399660].
Synthèse des preuves
The current evidence is based entirely on in vitro studies and animal models (mice/rats); there are no human clinical trials provided. Strength of evidence is low (Level D).
Sources PubMed
1.PMID: 37211190 (2023) — Pharmacognostic profiles, evaluation of analgesic, anti-inflammatory and anticonvulsant activities of Newbouldia laevis (P. Beauv.) Seem. ex Bureau leaf and root extracts in Wistar rats. · Journal of ethnopharmacology
2.PMID: 31759112 (2020) — Anxiolytic- and antidepressant-like activities of hydroethanol leaf extract of Newbouldia laevis (P.Beauv.) Seem. (Bignoniaceae) in mice. · Journal of ethnopharmacology
3.PMID: 31926312 (2020) — Newbouldia laevis improved glucose and fat homeostasis in a TYPE-2 diabesity mice model. · Journal of ethnopharmacology
4.PMID: 32720525 (2022) — Newboulasides A and B, two new caffeic acid glycosides from Newbouldia laevis with α-amylase inhibitory activity. · Natural product research
5.PMID: 21960378 (2012) — In vitro anthelmintic activity of the essential oils of Zanthoxylum zanthoxyloides and Newbouldia laevis against Strongyloides ratti.
Sources gouvernementales
Aucune monographie gouvernementale directe n'est disponible pour cette plante. Le contenu ci-dessous est généré par IA et n'a pas été vérifié par rapport à une source gouvernementale faisant autorité. Utilisez les liens de recherche pour consulter les sources officielles avant de vous fier à ces informations.
Newbouldiaquinone A showed moderate chemo suppression of Plasmodium falciparum growth in vitro [PMID:16442576]
Preuve DHelminthiasis
Essential oils and extracts inhibited the exsheathment of third-stage infective larvae of gastrointestinal nematodes in vitro [PMID:21960378, 21497021]
· Parasitology research
6.PMID: 33157560 (2021) — Studies on Bignoniaceae: Newbouldiosides D - F, Minor Phenylethanoid Glycosides from Newbouldia laevis, and New Flavonoids from Markhamia zanzibarica and Spathodea campanulata. · Planta medica
7.PMID: 17718200 (2007) — Antimicrobial activity of the methanolic extract and of the chemical constituents isolated from Newbouldia laevis. · Die Pharmazie
8.PMID: 33355056 (2020) — Secondary metabolites of endophytic fungi from Newbouldia laevis and Cassia tora leaves: prospecting for new antimicrobial agents. · Recent patents on anti-infective drug discovery
9.PMID: 12577520 (2002) — Sedative effects of the methanolic leaf extract of Newbouldia laevis in mice and rats. · Bollettino chimico farmaceutico
10.PMID: 20161915 (2007) — Phytochemical and in vitro antimicrobial assay of the leaf extract of Newbouldia laevis. · African journal of traditional, complementary, and alternative medicines : AJTCAM
11.PMID: 37438649 (2024) — Cellular toxicity and DNA damage induced by Newbouldia laevis used for male infertility treatment in prokaryotic and eukaryotic models. · Protoplasma
13.PMID: 16497346 (2006) — Newbouldiosides A-C, phenylethanoid glycosides from the stem bark of Newbouldia laevis. · Phytochemistry
14.PMID: 25348466 (2014) — Computational study of antimalarial pyrazole alkaloids from Newbouldia laevis. · Journal of molecular modeling
15.PMID: 15930769 (2005) — Newbouldiaquinone and newbouldiamide: a new naphthoquinone-anthraquinone coupled pigment and a new ceramide from Newbouldia laevis. · Chemical & pharmaceutical bulletin
16.PMID: 21497021 (2011) — Involvement of tannins and flavonoids in the in vitro effects of Newbouldia laevis and Zanthoxylum zanthoxyloïdes extracts on the exsheathment of third-stage infective larvae of gastrointestinal nematodes. · Veterinary parasitology
17.PMID: 16442576 (2006) — Newbouldiaquinone A: A naphthoquinone-anthraquinone ether coupled pigment, as a potential antimicrobial and antimalarial agent from Newbouldia laevis. · Phytochemistry
18.PMID: 19619631 (2009) — Mutagenic screening of some commonly used medicinal plants in Nigeria. · Journal of ethnopharmacology
19.PMID: 27114686 (2016) — Ethnobotanical Study of Medicinal Plants Used for the Treatment of Malaria in the Plateau Region, Togo. · Pharmacognosy research
20.PMID: 25849161 (2015) — In vitro antioxidant capacity and free radical scavenging evaluation of active metabolite constituents of Newbouldia laevis ethanolic leaf extract. · Biological research
21.PMID: 27399660 (2016) — In Vitro Reversible and Time-Dependent CYP450 Inhibition Profiles of Medicinal Herbal Plant Extracts Newbouldia laevis and Cassia abbreviata: Implications for Herb-Drug Interactions. · Molecules (Basel, Switzerland)
22.PMID: 26590804 (2015) — In vitro antibacterial and antibiotic-potentiation activities of the methanol extracts from Beilschmiedia acuta, Clausena anisata, Newbouldia laevis and Polyscias fulva against multidrug-resistant Gram-negative bacteria. · BMC complementary and alternative medicine