Strychnos Spinosa (Strychnos spinosa): Benefits, Dosage, Safety & Evidence

Frequently asked questions

How does Strychnos spinosa work against malaria?

Strychnos spinosa contains bioactive compounds including loganin, flavonoids, and tannins that may contribute to its antimalarial properties. The iridoid glycoside loganin has demonstrated antimalarial activity in preliminary research. Additionally, the plant's bitter principles and alkaloids may create an unfavorable environment for parasites. However, specific mechanisms remain poorly characterized, with evidence rated at Level C (preliminary/traditional use). More research is needed to fully understand the antimalarial mechanism.

Does Strychnos spinosa interact with any medications?

Limited formal interaction studies exist for Strychnos spinosa. However, the presence of trace strychnine and other alkaloids in the bark raises potential concerns with central nervous system medications, muscle relaxants, and drugs affecting seizure thresholds. The tannin content may reduce absorption of certain medications if taken concurrently. Patients taking prescription medications should consult healthcare providers before using Strychnos spinosa bark preparations. Evidence level: C (theoretical based on constituent profile).

What is the safe dosage of Strychnos spinosa bark?

Traditional use involves small doses of bark decoction for fever and malaria treatment. The fruit pulp is consumed as food without specific dosage restrictions. However, the bark contains toxic alkaloids including trace strychnine, making precise dosing critical. High doses can cause serious toxicity. No standardized clinical dosing guidelines exist due to limited research (Evidence Level C). Only qualified practitioners should determine appropriate bark dosages, and self-medication with bark preparations is strongly discouraged.

Is Strychnos spinosa safe during pregnancy and breastfeeding?

Strychnos spinosa bark is considered unsafe during pregnancy and breastfeeding. The bark contains toxic alkaloids, including trace amounts of strychnine, which may cross the placenta and affect fetal development. These compounds can stimulate the nervous system and cause uterine contractions, potentially leading to miscarriage or premature labor. The fruit pulp may be safer as a food, but pregnant women should avoid all bark preparations. Evidence level: C (based on constituent toxicity profile).

What are the side effects of Strychnos spinosa bark?

The fruit pulp of Strychnos spinosa is generally well-tolerated as a food source. However, the bark can cause serious side effects at high doses due to toxic alkaloids including trace strychnine. Potential adverse effects include muscle twitching, rigidity, seizures, respiratory difficulties, and in severe cases, death. Lower doses may cause nausea, vomiting, and neurological symptoms. Children are particularly vulnerable to bark toxicity. Evidence level: C (based on traditional knowledge and constituent analysis).

PubMed-compiled information sheet

This sheet was compiled from PubMed (NIH) abstracts using AI assistance. Every factual claim is cited to a real PubMed article (see the source list). It has not yet been human-reviewed — confirm with a healthcare provider before use.

Compiled from 28 PubMed articles · model: gemma4:31b

Summary

Strychnos spinosa (spiny monkey orange) is an African indigenous fruit tree valued for its nutritional content and diverse applications in folk medicine [PMID:34601082, PMID:34961256].

Background

Strychnos spinosa Lam., also known as green monkey orange, is a deciduous fruit tree endemic to tropical and subtropical Africa [PMID:34601082, PMID:14518952, PMID:25428165]. It is considered a nutrient-dense species particularly important for food security in rural areas of Southern Africa [PMID:34961256, PMID:40428506].

Traditional uses

In folk medicine, various parts of the plant are used to treat malaria [PMID:34601082, PMID:15894138], diabetes [PMID:34601082], snakebites, skin-related conditions, and sexually transmitted infections [PMID:34601082]. It is also traditionally used in Benin to treat sleeping sickness [PMID:15036465, PMID:16557466].

Active compounds

Identified compounds include secoiridoid glucosides (stryspinoside, strychosides A and B) [PMID:16180832], tertiary alkaloids (11-methoxy-diaboline and 12-hydroxy-11-methoxy-diaboline) [PMID:17340349], and leaf essential oil constituents such as palmitic acid, linalool, and (E)-phytol [PMID:16557466]. Triterpenoids and sterols, specifically saringosterol and 24-hydroperoxy-24-vinylcholesterol, have also been isolated [PMID:17637068].

Mechanism of action

Leaf extracts and fractions have demonstrated the ability to inhibit nitric oxide (NO), a mediator of inflammation [PMID:28480356].

Clinical evidence

Evidence DInflammation

Leaf extracts (specifically water and chloroform fractions) showed significant nitric oxide-inhibitory activity in vitro [PMID:28480356].

Evidence DAfrican Trypanosomiasis (Sleeping Sickness)

Methylene chloride leaf extracts and specific compounds (saringosterol, 24-hydroperoxy-24-vinylcholesterol, (E)-nerolidol, and linalool) exhibited in vitro antitrypanosomal activity against Trypanosoma brucei [PMID:15036465, PMID:17637068, PMID:16557466].

Evidence CBacterial Infections

The plant is reported to have constituents with a minimum inhibitory concentration (MIC) ≤ 5 μg/mL against various bacteria [PMID:35406911].

Evidence BCattle Ticks

Aqueous fruit extracts were evaluated for efficacy against Rhipicephalus (Boophilus) decoloratus larvae [PMID:23456785].

Evidence DDiabetes

Aqueous extracts administered to guinea pigs did not induce significant lowering of normal glycemia in hypoglycemic tests [PMID:28425214].

Safety & adverse effects

In vitro studies on macrophage U937 cell lines indicated low cytotoxicity for certain leaf extracts [PMID:28480356]. However, methylene chloride leaf extracts showed toxicity to mammalian cell lines (L6 and J774) [PMID:15036465].

Evidence summary

The current evidence is primarily based on in vitro laboratory studies (D) and ethnobotanical reviews (C), with one randomized controlled trial (B) focusing on veterinary application. There is a lack of human clinical trial data.

PubMed sources

1.PMID: 34601082 (2022) — Health benefits and biological activities of spiny monkey orange (Strychnos spinosa Lam.): An African indigenous fruit tree. · Journal of ethnopharmacology
2.PMID: 34961256 (2021) — Undervalued Spiny Monkey Orange (Strychnos spinosa Lam.): An Indigenous Fruit for Sustainable Food-Nutrition and Economic Prosperity. · Plants (Basel, Switzerland)
3.PMID: 37570964 (2023) — Assessing Genetic Variation among Strychnos spinosa Lam. Morphotypes Using Simple Sequence Repeat Markers. · Plants (Basel, Switzerland)
4.PMID: 16180832 (2005) — Secoiridoid glucosides from Strychnos spinosa. · Journal of natural products
5.PMID: 35406911 (2022) — An Annotated Inventory of Tanzanian Medicinal Plants Traditionally Used for the Treatment of Respiratory Bacterial Infections.

Strychnos Spinosa

Sources & Citations

Calculate a safe dose of Strychnos Spinosa