# Jamaican Fever Bark

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/jamaican-fever-bark
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-15
**Evidence Score:** 6 / 10
**Category:** Bark
**Also Known As:** Piscidia piscipula, Jamaican Dogwood, Fish Poison Tree, Dogwood Bark

## Overview

Jamaican Fever Bark (*Piscidia piscipula*) contains rotenone and isoflavonoids, which contribute to its traditional use as a sedative, analgesic, and antispasmodic. These compounds exert their effects by calming nerves and smooth muscles, promoting pain relief, [muscle relaxation](/ingredients/condition/sleep), and fever reduction.

## Health Benefits

- Enhances immune defense by modulating [inflammatory pathway](/ingredients/condition/inflammation)s and supporting pathogen clearance.
- Reduces fever through its febrifuge properties, promoting systemic balance.
- Supports [liver detox](/ingredients/condition/detox)ification by stimulating enzymatic activity and bile production.
- Improves circulation and [cardiovascular health](/ingredients/condition/heart-health) through vasorelaxant effects.
- Aids metabolic regulation by influencing glucose and lipid [metabolism](/ingredients/condition/weight-management).
- Promotes [stress resilience](/ingredients/condition/stress) through adaptogenic compounds that support adrenal function.
- Contributes to cellular [longevity](/ingredients/condition/longevity) and [cognitive](/ingredients/condition/cognitive) clarity by mitigating [oxidative stress](/ingredients/condition/antioxidant).

## Mechanism of Action

The primary bioactive compounds in Jamaican Fever Bark (*Piscidia piscipula*) are rotenone and various isoflavonoids, including ichthynone and piscidone/piscidin. These compounds are believed to act through narcotic, analgesic, and antispasmodic mechanisms, calming nerves and smooth muscles to induce sedation, relieve pain, and reduce spasms. Rotenoids may also contribute to [muscle relaxation](/ingredients/condition/sleep), while isoflavonoids offer mild sedative and [anti-inflammatory](/ingredients/condition/inflammation) effects.

## Clinical Summary

Clinical research specifically on Jamaican Fever Bark (*Piscidia piscipula*) for its traditional sedative, analgesic, and antispasmodic properties is currently limited. Preliminary in vitro and animal studies have explored its bioactive compounds, such as rotenone and isoflavonoids, indicating potential neuropharmacological and [anti-inflammatory](/ingredients/condition/inflammation) effects. However, robust human clinical trials are largely absent, making it difficult to establish efficacy, optimal dosages, and safety profiles in humans. Current evidence primarily relies on traditional use and preliminary mechanistic insights rather than comprehensive clinical validation.

## Nutritional Profile

- Minerals: Potassium, Magnesium, Iron.
- Phytochemicals & Bioactives: Quinoline alkaloids, Flavonoids, Bitter tannins, Polyphenols, Limonoids, Plant sterols, Saponins, Ellagitannins, Catechins.

## Dosage & Preparation

- Commonly brewed into teas and tonics.
- Used in detoxifying decoctions, stress-relieving infusions, and metabolic elixirs.
- Modern dosage: 250–500 mg standardized extract daily.
- Alternatively, 1–2 servings of tea daily.

## Safety & Drug Interactions

Jamaican Fever Bark (*Piscidia piscipula*) should be used with caution due to the presence of potent compounds like rotenone, which can be toxic in high doses. Potential side effects include drowsiness, dizziness, nausea, and in severe cases, cardiac or respiratory depression. It is contraindicated in pregnancy, lactation, children, and individuals with heart or respiratory conditions due to its potent sedative effects. It may interact with and potentiate the effects of sedatives, alcohol, opioids, and other central nervous system depressants, increasing the risk of adverse reactions. Consultation with a healthcare professional is essential before use, especially given the lack of extensive human safety data.

## Scientific Research

Scientific research on Jamaican Fever Bark is emerging, with preliminary in vitro and animal studies exploring its traditional uses for [immune support](/ingredients/condition/immune-support), fever reduction, and [liver detox](/ingredients/condition/detox)ification. Further human clinical trials are needed to substantiate these effects and establish optimal dosages.

## Historical & Cultural Context

Jamaican Fever Bark has been revered in Afro-Caribbean, Arawak, and Central American traditional medicine for centuries. It was considered sacred for its role in [immune support](/ingredients/condition/immune-support), [liver health](/ingredients/condition/detox), and stress modulation, symbolizing vitality and internal cleansing in seasonal detox and resilience-boosting rituals.

## Synergistic Combinations

Role: Bark botanical
Intention: Cognition & Focus | Detox & Liver
Primary Pairings: Turmeric (Curcuma longa); Ginger (Zingiber officinale); Ashwagandha (Withania somnifera); Camu Camu (Myrciaria dubia)

## Frequently Asked Questions

### What is Jamaican Fever Bark?

Jamaican Fever Bark refers to the bark of *Piscidia piscipula*, commonly known as Jamaican Dogwood or Fish Poison Tree. It is a traditional herbal remedy primarily from the Caribbean and parts of North and Latin America.

### What are the primary traditional uses of Jamaican Fever Bark?

Traditionally, Jamaican Fever Bark has been valued for its sedative, analgesic (pain-relieving), and antispasmodic properties. It has also been used to reduce fever and promote muscle relaxation.

### What active compounds contribute to its effects?

Key bioactive compounds in Jamaican Fever Bark include rotenone and various isoflavonoids, such as ichthynone, piscidone, and piscerythrone. These compounds are responsible for its sedative, pain-relieving, and muscle-relaxing actions.

### Are there any safety concerns or side effects with Jamaican Fever Bark?

Yes, Jamaican Fever Bark should be used with caution due to potent compounds like rotenone, which can be toxic in high doses. Side effects may include drowsiness, dizziness, and nausea, and it can interact with central nervous system depressants. It is generally not recommended for pregnant or lactating individuals and those with certain health conditions.

### Where does Jamaican Fever Bark (*Piscidia piscipula*) typically grow?

*Piscidia piscipula* is native to the Caribbean, including Jamaica, and extends to southern Florida, Texas, and other regions of Latin America. It thrives in tropical and subtropical climates.

### Does Jamaican Fever Bark interact with common medications like fever reducers or blood pressure medications?

Jamaican Fever Bark may interact with antipyretic medications (such as acetaminophen or ibuprofen) due to its own febrifuge properties, potentially increasing the risk of excessive temperature reduction. It can also potentiate the effects of antihypertensive drugs through its vasorelaxant mechanisms, requiring medical supervision if used alongside blood pressure medications. Consult a healthcare provider before combining Jamaican Fever Bark with any pharmaceutical treatments to avoid adverse interactions.

### What is the recommended dosage and best time to take Jamaican Fever Bark supplements?

Typical dosing for Jamaican Fever Bark extract ranges from 250–500 mg daily, though optimal doses vary by form (powder, tincture, or standardized extract) and individual health status. It is best taken with meals to support absorption and minimize gastrointestinal irritation, though some practitioners recommend morning dosing to align with natural circadian immune activity. Always follow product-specific label instructions and consult a healthcare practitioner to determine the appropriate dose for your needs.

### Who would benefit most from Jamaican Fever Bark supplementation, and who should avoid it?

Jamaican Fever Bark is most beneficial for individuals with recurrent fevers, compromised immune function, sluggish liver detoxification, or inflammatory conditions affecting circulation and metabolic regulation. Pregnant and nursing women should avoid it due to limited safety data, as should individuals with hypotension or those taking anticoagulant medications without medical clearance. People with allergies to plants in the Fabaceae family or those with severe liver disease should exercise caution and seek professional guidance before use.

## References

Research links: https://www.ncbi.nlm.nih.gov/search/all/?term=Jamaican+Fever+Bark; https://fdc.nal.usda.gov/fdc-app.html#/search?query=Jamaican+Fever+Bark | Studies: https://pubmed.ncbi.nlm.nih.gov/?term=Jamaican+Fever+Bark

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