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Safety Overview
1.Cinchona — Botanical Snapshot
Cinchona (Cinchona officinalis), often referred to as the 'fever tree,' is a remarkable evergreen tree within the extensive Rubiaceae family, which notably includes coffee. This species is indigenous to the Andean cloud forests of South America, thriving particularly in the moist, high-altitude regions of Peru, Ecuador, Colombia, and Bolivia, typically at elevations ranging from 1,500 to 3,000 meters.
The tree can reach impressive heights of up to 15 meters, characterized by a straight trunk and a spreading, often dense canopy. Its bark, the most medicinally significant part, is distinctively reddish-brown, commonly furrowed or fissured, and possesses an intensely bitter taste due to its high concentration of various alkaloids.
Morphologically, the leaves of Cinchona officinalis are typically opposite, simple, and ovate to elliptical in shape, featuring entire margins and prominent venation. They present a dark green, glossy upper surface contrasted by a paler underside. The flowers are small, exquisitely fragrant, and arranged in terminal or axillary panicles.
They exhibit hues of pink, red, or purple, are tubular with five lobes, and often possess a delicate, almost velvety texture. The fruit develops into a small, ovoid or oblong capsule that encases numerous flattened, winged seeds, which are efficiently dispersed by wind.
Historically, Cinchona holds immense cultural and scientific significance. Its potent medicinal properties were first recognized and utilized by indigenous Andean communities for treating fevers and chills. The plant gained global prominence in the 17th century when its bark was introduced to Europe as a revolutionary remedy for malaria, earning monikers like 'Peruvian Bark' or 'Jesuit's Bark.' This pivotal discovery transformed medicine, saving countless lives and playing a crucial role in the exploration and colonization of tropical regions.
The subsequent isolation and extraction of quinine, its primary active compound, further solidified Cinchona's enduring legacy in pharmaceutical history. Taxonomically, Cinchona officinalis is one of many species within the diverse Cinchona genus, distinguished by specific morphological characteristics and alkaloid profiles.
Trusted Scientific References
Authoritative external sources for Cinchona officinalis:
1.1.Cinchona — Highlights
- ✓Evergreen tree native — Evergreen tree native to Andean cloud forests.
- ✓Belongs to the — Belongs to the Rubiaceae family, related to coffee.
- ✓Distinctive reddish — brown, intensely bitter bark.
- ✓Primary natural source — Primary natural source of the antimalarial alkaloid, quinine.
- ✓Historically known as — Historically known as 'Peruvian Bark' or 'Jesuit's Bark.'
- ✓Flowers are small, — Flowers are small, fragrant, and typically pink, red, or purple.
- ✓Contains other active — Contains other active alkaloids such as quinidine, cinchonine, and cinchonidine.
- ✓Played a crucial — Played a crucial role in global health history and tropical exploration.
- ✓Extremely potent; use — Extremely potent; use of bark preparations is associated with significant health risks.
- ✓Extract used as — Extract used as a flavoring in beverages like tonic water.
1.2.Cinchona — At-a-Glance Summary
- ✓Cinchona, the 'fever tree,' is native to the Andean forests of South America.
- ✓It is the historical source of quinine, a potent antimalarial alkaloid.
- ✓Known as 'Peruvian Bark,' it revolutionized malaria treatment globally.
- ✓Contains powerful alkaloids like quinine and quinidine, with significant medicinal properties.
- ✓Despite its benefits, Cinchona carries a high risk of severe side effects and drug interactions.
- ✓Primarily used today as a flavoring agent in tonic water, with strict medical oversight for its alkaloids.
2.Cinchona — Scientific Identity
3.Cinchona — Categories & Tags
4.Cinchona — Botanical Features
5.Cinchona — Heritage Uses
6.Cinchona — Phytochemistry
- ✓Quinolone Alkaloids — This is the primary class, including Quinine (C20H24N2O2), the most potent antimalarial, antipyretic, and muscle relaxant; Quinidine (C20H24N2O2), an antiarrhythmic; Cinchonine (C19H22N2O), a weaker antimalarial and bitter tonic; and Cinchonidine (C19H22N2O), also a weaker antimalarial and bitter tonic. These compounds are responsible for most of Cinchona's pharmacological actions.
- ✓Cinchotannic Acid — A significant tannin found in the bark, contributing to its astringent properties and bitter taste. It also possesses antioxidant activity.
- ✓Phenolic Compounds — Various phenolic acids and flavonoids are present, offering antioxidant and potential anti-inflammatory benefits.
- ✓Organic Acids — Including Malic acid and Quinic acid, which are general plant metabolites and contribute to the plant's chemical complexity.
- ✓Glycosides — Bitter glycosides are also found, reinforcing the characteristic bitter taste of the bark.
- ✓Resins — Minor components that contribute to the plant material's overall properties.
- ✓Volatile Oils — Present in trace amounts, contributing subtly to the plant's aroma profile.
- ✓Triterpenes — Compounds like ursolic acid and oleanolic acid derivatives may be present, often associated with anti-inflammatory and hepatoprotective activities.
7.Cinchona — Scientific Evidence
- ✓Antimalarial Activity — Cinchona bark, primarily through its quinine content, is historically and medically recognized for its potent ability to combat Plasmodium falciparum and other malaria parasites, disrupting their life cycle within the host.
- ✓Antipyretic Effect — The alkaloids in Cinchona, especially quinine, possess significant fever-reducing properties, making it effective in alleviating the high fevers associated with malaria and other febrile conditions.
- ✓Muscle Cramp Relief — Quinine, an active constituent, has been traditionally used and studied for its ability to reduce the frequency and intensity of nocturnal leg cramps, though its use for this purpose is now highly regulated due to safety concerns.
- ✓Digestive Bitter Tonic — The intense bitterness of Cinchona bark stimulates digestive secretions, including saliva and gastric juices, which can aid digestion, improve appetite, and relieve dyspepsia.
- ✓Antiarrhythmic Properties — Quinidine, another major alkaloid in Cinchona, is a potent antiarrhythmic agent historically used to treat certain cardiac arrhythmias, specifically to regulate irregular heartbeats.
- ✓Astringent Action — The presence of tannins in the bark provides astringent properties, which can help to tighten tissues and reduce secretions, traditionally used in topical applications.
- ✓General Tonic Support — Historically, Cinchona was valued as a general tonic to invigorate the body during convalescence or states of weakness, owing to its stimulating and fortifying effects.
- ✓Anti-inflammatory Support — Some traditional uses and preliminary research suggest potential mild anti-inflammatory effects from Cinchona's complex chemical profile, contributing to overall well-being.
- ✓Local Anesthetic Properties — Certain Cinchona alkaloids have been shown to possess mild local anesthetic activity, contributing to its historical use for localized pain relief.
7.1.Cinchona — Health Applications
8.Cinchona — Cautions & Contraindications
8.1.Cinchona — Side Effects & Warnings
- ✓Cinchonism — A common constellation of symptoms including tinnitus (ringing in the ears), headache, dizziness, nausea, blurred vision, and altered hearing.
- ✓Hypersensitivity Reactions — Can manifest as skin rashes, itching, flushing, and in severe cases, anaphylaxis.
- ✓Gastrointestinal Distress — Nausea, vomiting, abdominal pain, and diarrhea are common, especially with higher doses.
- ✓Cardiac Arrhythmias — Quinine and quinidine can prolong the QT interval, leading to serious and potentially fatal irregular heartbeats, particularly in susceptible individuals.
- ✓Thrombocytopenia — A reduction in blood platelet count, increasing the risk of bleeding and bruising.
- ✓Hemolytic Anemia — In individuals with G6PD deficiency, Cinchona can trigger the destruction of red blood cells.
- ✓Uterine Stimulation — In pregnant individuals, Cinchona can induce uterine contractions, leading to miscarriage or premature labor.
8.2.Cinchona — Safety Profile
- ✓Pregnancy and Lactation — Cinchona is considered likely unsafe during pregnancy due to uterine stimulant effects and potential for birth defects, and possibly unsafe during breastfeeding as alkaloids can pass to the infant.
- ✓Cardiovascular Conditions — Contraindicated in individuals with heart conditions such as long QT interval syndrome or other arrhythmias, as it can exacerbate irregular heartbeats.
- ✓Gastrointestinal Ulcers — Avoid use in individuals with stomach or intestinal ulcers due to an increased risk of bleeding.
- ✓Myasthenia Gravis — Contraindicated in patients with Myasthenia Gravis, as quinine and quinidine can worsen muscle weakness.
- ✓Drug Interactions — Interacts significantly with numerous medications, including anticoagulants, digoxin, quinidine, antacids, and drugs metabolized by the CYP2D6 enzyme, increasing the risk of adverse effects.
- ✓Discontinuation Warning — Users should discontinue use immediately if symptoms of cinchonism (tinnitus, hearing loss, skin rash, visual disturbances) occur.
- ✓Not for Over-the-Counter Use — The FDA has banned over-the-counter sales of quinine for leg cramps due to serious and potentially fatal side effects, emphasizing its high-risk profile for self-medication.
9.Cinchona — Preparations & Uses
- ✓Traditional Decoction — Historically, Cinchona bark was prepared as a decoction by boiling the bark in water, then strained and consumed as a bitter tea to treat fevers and malaria.
- ✓Tincture Preparation — A common modern herbal preparation involves macerating the dried bark in an alcohol-water solution to create a concentrated tincture, allowing for controlled dosing.
- ✓Powdered Bark Encapsulation — Dried and finely powdered Cinchona bark can be encapsulated for convenient oral administration, though accurate dosing and safety remain critical concerns.
- ✓Flavoring Agent — Cinchona bark extract is legally used as a flavoring in tonic water and certain alcoholic beverages, imparting its characteristic bitter taste.
- ✓Topical Applications — Traditionally, crushed bark or strong decoctions were sometimes used externally as poultices or washes for wounds or skin conditions, due to its astringent properties.
- ✓Isolated Alkaloid Extraction — Modern pharmaceutical use primarily involves the extraction and purification of quinine sulfate or quinidine for specific medical treatments, rather than the raw bark.
- ✓Dosage Caution — Due to its high potency and significant side effects, Cinchona bark is not recommended for self-medication and appropriate dosages are highly complex and often medically supervised if used at all.
10.Cinchona — Garden Cultivation
- ✓Climate Requirements — Cinchona thrives in tropical highland climates with consistent high humidity, ample rainfall (1,500-3,000 mm annually), and moderate temperatures between 15-22°C, without frost.
- ✓Soil Preferences — Requires well-drained, acidic to slightly acidic soils (pH 4.5-6.0) that are rich in organic matter, often volcanic in origin.
- ✓Propagation Techniques — Can be propagated from seeds, which require careful germination, or more commonly from stem cuttings, grafting, or tissue culture for commercial production.
- ✓Light and Shade — Young Cinchona plants require partial shade for optimal establishment, gradually transitioning to full sun exposure as they mature for maximum alkaloid production.
- ✓Harvesting Process — The bark, the medicinally valuable part, is typically harvested from trees that are 6-10 years old, either by stripping entire sections or by making longitudinal incisions.
- ✓Sustainable Practices — Reforestation and selective harvesting methods are crucial for sustainable cultivation to prevent overexploitation and preserve natural populations.
- ✓Pest and Disease Management — Susceptible to various fungal diseases and insect pests, necessitating integrated pest management strategies to ensure healthy growth and yield.
Reviewed by the Flora Medical Global Botanical Review Panel
Multi-disciplinary editorial group · Botany · Ethnobotany · Herbal-medicine literature
Who reviewed this: This page was checked by the Flora Medical Global Botanical Review Panel — an in-house editorial group of botany graduates, ethnobotany researchers, and horticulture practitioners who collectively maintain our 7,000+ plant encyclopedia. Meet the team.
Our 4-step verification process
1. Taxonomic verification
Scientific names and synonyms cross-checked against Kew POWO, World Flora Online, and The Plant List.
2. Phytochemical & medicinal cross-reference
Active compounds, traditional uses, and reported activities are cross-referenced with PubMed, USDA Dr. Duke's database, and peer-reviewed ethnobotanical literature.
3. Conservation & distribution check
Distribution, ecology, and conservation status confirmed against GBIF occurrence records and the IUCN Red List.
4. Editorial & safety review
Every entry passes an editorial pass for clarity, originality, and safety notices (toxicity, contraindications, dosage caveats) before publication.
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Important medical disclaimer: This content is for educational and research purposes only. It is not medical advice and is not a substitute for consultation with a licensed healthcare provider. Do not use any herb to self-treat a medical condition without professional guidance.
Editorial Note: This page is for educational and research purposes only and is not medical advice.
Written by: Flora Medical Global Editorial Team
Reviewed by: Flora Medical Global Botanical Review Panel
Last Updated: June 28, 2026
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