1. Introduction: Nigeria’s Heavy Burden of Sickle Cell Disease
Sickle cell disease (SCD) represents one of the most significant genetic health challenges facing Nigeria and the African continent. Nigeria bears the greatest burden of sickle cell disease in sub-Saharan Africa, with an estimated 150,000 babies born with the condition annually, making it the sixth leading cause of childhood death in the country. The country’s high prevalence is attributed in part to the protective effect of the sickle cell trait against malaria, which has maintained the gene frequency in malaria-endemic regions.
The disease results from a single base substitution in the gene encoding the human beta-globin subunit, causing the replacement of glutamic acid by valine at the sixth position of the beta-globin chain. This seemingly small change produces haemoglobin S (HbS), which, when deoxygenated, polymerises and causes red blood cells to assume a characteristic sickle shape. The clinical consequences include haemolytic anaemia, recurrent painful vaso-occlusive crises, chronic end-organ damage, and significantly reduced life expectancy.
In Nigeria, the challenges of managing SCD are compounded by limited healthcare resources, high treatment costs, and the competing priorities of infectious diseases such as malaria and HIV/AIDS. Conventional treatments including hydroxyurea, folic acid supplementation, penicillin prophylaxis, and blood transfusions are often expensive and inaccessible to many families, with patients frequently spending more than 25% of their monthly income on healthcare.
Against this backdrop, traditional medicine has remained a cornerstone of SCD management across Nigerian communities. The widespread use of herbal remedies, spiritual interventions, and holistic approaches reflects both the cultural heritage of Nigerian peoples and the economic realities facing families living with this chronic condition.
2. Conceptualisation of Sickle Cell Disease in Nigerian Traditional Thought
Understanding the traditional management of sickle cell anaemia requires appreciation of how the condition is perceived within Nigerian cultural frameworks. The conceptualisation of health and disease in African Traditional Medicine is far more sophisticated than many biomedical scientists may assume.
Across various Nigerian ethnic groups, sickle cell anaemia is recognised as a chronic, enduring condition with spiritual and social dimensions:
| Ethnic Group | Traditional Term | Conceptualisation |
| Hausa-Fulani | “Sankara-miji“ | Perceived as “paranormal” and incurable |
| Yoruba | “Abiku“ | Umbrella term encompassing sickle cell anaemia, associated with spirit children who repeatedly die and are reborn |
| Igbo | “Ogbanje” or “iyi-uwa” | Similar to the Yoruba concept, involving spirit children believed to cause suffering before departing |
| Idoma | No specific name recorded | Classed among diseases believed to be caused by evil spirits or misconduct; marriage between close relatives is considered an abomination associated with such disorders |
These traditional conceptualisations demonstrate that Nigerian communities are not only aware of the syndrome but also recognise its chronicity, endemicity, and the challenges it presents to families. This understanding has shaped the development of specific management strategies, including herbal treatments that have been refined over generations.
3. NIPRISAN®: Nigeria’s Most Significant Herbal Antisickling Achievement
3.1 Development and Composition
The most scientifically well-documented and significant Nigerian herbal remedy for sickle cell anaemia is NIPRISAN® (now known as Nicosan®), developed by the National Institute for Pharmaceutical Research and Development (NIPRD) in Abuja. This formulation is based on a traditional Yoruba recipe and represents a landmark achievement in the integration of traditional medicine with modern pharmaceutical development.
The herbal components of NIPRISAN are derived from four plants:
| Plant | Common Name | Traditional Role |
| Eugenia caryophyllata | Clove (“Kanunfari” in Hausa) | Pain relief, antimicrobial |
| Piper guineense | West African black pepper (“Eche” in Idoma, “Uziza” in Igbo) | Pain relief, digestive health |
| Pterocarpus osun | African rosewood (common in Osun State) | Blood tonic, wound healing |
| Sorghum bicolor | Guinea corn | Nutritional support, the leaf stalk yields an extract resembling blood |
Before the development of NIPRISAN, these herbs were typically extracted either with “ogoro” (an ethanolic distillate of palm wine) or with an aqueous solution of trona (sodium sesquicarbonate, a mineral used in Nigeria as a food tenderiser).
3.2 Scientific Validation and Regulatory Approval
NIPRISAN has undergone rigorous scientific evaluation, establishing it as the most thoroughly studied herbal antimalarial in Nigeria:
- Clinical Trials: The formulation completed Phases IIA and IIB clinical trials in Nigeria
- Regulatory Approval: Received formal approval for use in Nigeria for the treatment of SCD in 2006
- International Recognition: The US FDA determined sufficient safety and efficacy data to support a Phase III clinical trial
- Global Reach: Widely used in Nigeria and known in India and the USA
3.3 Mechanisms of Action: Phytocannabinoids and Vanilloids
The therapeutic effects of NIPRISAN extend beyond simple antisickling activity. Research has revealed that compounds in E. caryophyllata and P. guineense may account for pain-relieving effects during sickle cell crises through interactions with vanilloid and cannabinoid receptors.
Vanilloids present in these plants include:
| Compound | Source | Effect |
| Eugenol | Clove (E. caryophyllata) | Numbing analgesic effect; used in toothpaste formulations |
| Piperine | West African black pepper (P. guineense) | Pain relief through counterirritation; produces endorphins |
| Vanillin | Various sources | Flavour compound |
Eugenol’s fat solubility allows it to penetrate tissues and bind to lipid-rich membrane-bound vanilloid receptors, producing analgesic effects. Piperine and capsaicin interact with the same receptors, paradoxically causing initial burning sensations that ultimately lower pain sensitivity through endorphin release. People who consume significant amounts of pepper (as the Idoma and Yoruba do) build tolerance to these compounds, experiencing pleasurable endorphin-mediated well-being.
The cannabinoid β-caryophyllene, also present in clove, binds selectively to CB2 receptors, contributing to the anti-inflammatory and analgesic effects of the formulation.
4. Other Nigerian Herbal Remedies with Scientific Validation
4.1 Scientific Studies on Antisickling Activity
Recent research has provided scientific validation for numerous Nigerian plants used traditionally in SCD management:
Study from Sokoto, Nigeria (2024)
A study examining plants used by traditional medical professionals in Sokoto State evaluated the antisickling activity of five plants:
| Plant | Antisickling Activity (%) | Key Findings |
| Khaya senegalensis | 95.29 ± 5.62% | Highest reversal activity |
| Vernonia amygdalina | 92.19 ± 6.91% | Strong membrane stabilisation |
| Cassia nigricans | 92.26 ± 5.01% | IC₅₀ = 5.01 mg/mL for membrane stability |
| Ficus sycomorus | 92.11 ± 6.31% | Significant activity |
| Ficus carica | 88.32 ± 3.98% | Highest membrane stabilising potential (IC₅₀ = 3.98 mg/mL) |
All extracts demonstrated high potency in maintaining erythrocyte membrane integrity and altering sickle cell haemoglobin polymerisation at increasing concentrations. Phytochemical screening revealed the presence of alkaloids, saponins, terpenes, and flavonoids, confirming the traditional use of these plants.
Combretum platypterum (2025)
A study evaluating the leaf and stem of Combretum platypterum reported for the first time its antisickling activity:
- Inhibitory antisickling activity: Ethyl acetate fraction of the leaf methanol extract exhibited 89.8% inhibition
- Reversal antisickling activity: n-Hexane fraction of the leaf showed 77.7% activity
- Total phenolic content: 12.60 mg GAE/g in the most active fraction
- Total flavonoid content: 17.62 mg QE/g in the n-hexane fraction
The study concluded that these findings provide scientific justification for the ethnomedicinal use of C. platypterum in sickle cell disease management.
Alchornea cordifolia (2014)
Christmas bush, widely distributed in Southeastern Nigeria, demonstrated profound antisickling effectiveness:
| Fraction | Inhibition of HbSS Polymerisation | Fe²⁺/Fe³⁺ Ratio Improvement |
| Water-soluble fraction (WAS) | 98.12% in 20 minutes | Remarkable improvement |
| Fat-soluble fraction (FAS) | 47.50% in 20 minutes | Remarkable improvement |
| Butanol-soluble fraction (BUS) | 47.50% in 20 minutes | No improvement |
Phytochemical composition included:
| Component | Content (mg/100g) |
| Total Vitamin C | 1929.18 mg |
| Total Free Amino Acids (FAS) | 526.8 mg |
| Potassium | 150.30 mg |
| Sodium | 228.20 mg |
The study concluded that the leaf extracts, with their preponderance of micro and macronutrients, vitamins, and amino acids, “may be very beneficial for the management of sickle cell disease”.
4.2 Three Native Nigerian Plants (Southeast)
Research on Ficus thonningii (FTH), Jatropha tanjorensis (JTR), and Justicia carnae (JCN) revealed preferential antisickling mechanisms:
| Plant | Inhibition of Sickling (%) | Polymerisation Inhibition (%) | Membrane Protection (Haemolysis at 0.35% saline) |
| Ficus thonningii | 49.818 ± 0.082% | 76.888 ± 0.042% | 26.548 ± 0.056% |
| Jatropha tanjorensis | 41.001 ± 0.413% | 48.723 ± 0.113% | 18.055 ± 0.064% |
| Justicia carnae | 33.957 ± 0.062% | 75.447 ± 0.063% | 20.217 ± 0.035% |
| Hydroxyurea (control) | 30.414 ± 0.162% | 70.903 ± 0.150% | 14.459 ± 0.040% |
These findings suggest the extracts contain potential antisickling phytochemicals that merit further exploration.
4.3 Tafafia: A Jos-Area Herbal Remedy
“Tafafia,” a herbal remedy used in the clinical management of sickle cell disease in the Jos area, demonstrated concentration-dependent antisickling activity:
| Concentration | Sickling Inhibition (90 min) |
| 0.8 µg/ml | 80.1% |
| 0.1 µg/ml | Lower activity |
| Control (normal saline) | 36.0% |
Preliminary phytochemical examination revealed the presence of alkaloids, saponins, and tannins, while anthraquinones were absent. The study confirmed “positive antisickling properties” supporting clinical use in the Jos area.
5. Ethnobotanical Surveys: Documentation of Nigerian Antisickling Plants
5.1 Plant Diversity in Traditional Use
Multiple ethnobotanical surveys have documented the rich diversity of Nigerian plants used for SCD management:
Kwara State Survey (2021)
A study in one rural and one urban local government area of Kwara State identified 57 plant species belonging to 34 families. The most prominent families were Fabaceae and Euphorbiaceae. Key plants by Use Mention Index (UMI) included:
| Plant | Family | Use Mention Index (UMI) |
| Elaeis guineense | Arecaceae | 0.124 |
| Khaya grandifoliola | Meliaceae | 0.094 |
| Carica papaya | Caricaceae | 0.094 |
| Hymenocardia acida | Phyllanthaceae | 0.094 |
| Mangifera indica | Anacardiaceae | 0.094 |
| Parquetina nigrescens | Asclepiadaceae | 0.094 |
| Xylopia aethiopica | Annonaceae | 0.094 |
Ekiti State Survey (2015)
A survey of 32 traditional medical practitioners in Gbonyin Local Government Area identified 44 plant species belonging to 44 genera and 30 families. The most prominent families were:
| Family | Genera Represented |
| Anacardiaceae | Anacardium occidentalis, Mangifera indica, Spondias mombin |
| Euphorbiaceae | Croton lobatus, Jatropha gossypifolia, Plukeneta conophora |
| Fabaceae | Cajanus cajan, Pterocarpus osun, Cassia siamea |
Key findings from the survey:
- 80% of respondents reported no side effects from herbal remedies
- Main preparation method: Decoction
- Dosage: Usually taken orally twice to thrice daily
- Herb sources: Collected from the forest or purchased from herb markets
Dutsin-Ma, Katsina State (2024)
An ethnobotanical survey identified 32 species of medicinal plants from 20 families used for management of common ailments including sickle cell anaemia. The study concluded that “traditional medicinal plants provide the alternative therapy for treatment and management of diseases to significant number of people” and that “herbal practitioners are still relevant to African healthcare system”.
5.2 Commonly Used Antisickling Plants
Based on the available literature, a selection of frequently used Nigerian antisickling plants includes:
| Plant Name | Common Name | Part Used | Scientific Evidence Level |
| Vernonia amygdalina | Bitter leaf | Leaves | High (92.19% reversal activity) |
| Khaya senegalensis | African mahogany | Bark | High (95.29% reversal activity) |
| Ficus carica | Fig | Stem bark | High (88.32% reversal, best membrane stability) |
| Alchornea cordifolia | Christmas bush | Leaves | High (98.12% inhibition) |
| Pterocarpus osun | African rosewood | Bark | Moderate (Component of NIPRISAN) |
| Cajanus cajan | Pigeon pea | Leaves | Moderate (Traditional use documented) |
| Carica papaya | Pawpaw | Leaves | Moderate (UMI 0.094) |
| Xylopia aethiopica | West African pepper | Fruits | Moderate (UMI 0.094) |
| Mangifera indica | Mango | Bark | Moderate (UMI 0.094) |
| Spondias mombin | Yellow mombin | Bark | Documented use |
6. Nutraceuticals: A Complementary Approach
6.1 Scientific Evidence from Nigeria
A retrospective study in Abuja evaluated a cohort of 10 children with sickle cell anaemia placed on a cocktail of nutraceuticals. Aroga immune support was the most common component. The results showed significant improvements at six months:
| Parameter | Baseline | At 6 Months | Statistical Significance |
| Average weight | 21.8 kg | 23.0 kg | p=0.236 (not significant) |
| Average haematocrit | 22.8% | 27.2% | p=0.011 (significant) |
| Average frequency of crises | 7.4 episodes | 3.2 episodes | p=0.011 (significant) |
Clinical outcomes:
- 8 out of 10 children showed moderate to good clinical improvement
- No adverse reactions documented in any child
- Overall clinical profile: moderate category
6.2 Potential Mechanisms
Nutraceuticals may work through multiple mechanisms:
- Omega-3 fatty acids (e.g., DHA from fish) improve RBC flexibility and reduce irreversibly sickled cells by up to 40% in animal models
- Nutritional support addresses the increased metabolic demands of chronic haemolysis
- Antioxidant effects reduce oxidative stress associated with sickling
The study authors concluded that “the use of nutraceuticals may be beneficial in the management of sickle cell anaemia in children” but emphasised that “the results are preliminary and will require stronger evidence”.
7. Non-Pharmacological Interventions: Adolescent Perspectives
7.1 Survey Findings
A population-based survey exploring non-pharmacological interventions (NPIs) for sickle cell crisis pain management among Nigerian adolescents (aged 12-18) revealed widespread use of complementary approaches:
| Finding | Percentage/Number |
| Participants who had used at least one NPI | 77% |
| Total NPIs reported | 31 different types |
| Average pain intensity during last crisis (out of 10) | 6.6 |
| Mean number of crises in past year | 4.53 episodes |
7.2 Most Commonly Used NPIs
| NPI | Past Use (%) | Future Plan to Use (%) |
| Massage | 53% | 33% |
| Herbal products | 37% | 45% |
| Prayer | 30% | 30% |
| Heat application | 20% | Not specified |
Reasons for NPI use included:
- “To feel better” (49%)
- “To prevent the pain from getting worse” (37%)
- First aid purposes (9%)
Reasons for NOT using NPI:
- “The healthcare team did not recommend it” (38%)
- Caregiver disapproval (8%)
7.3 Implications
The high prevalence of NPI use (77%) despite limited scientific evidence warrants attention. The study highlighted “an urgent need to further explore the specific NPIs used and their effectiveness on SCD outcomes and safety”. Adolescents also expressed preference for receiving NPI education via videos (34%) and animations (20%).
8. Faith Healing and Spiritual Interventions
8.1 Faith Healing Techniques
A qualitative study in Osun State examined faith healing techniques in SCD management outside medical settings. Key findings included:
Treatment techniques employed:
| Christian/Muslim Clerics | Traditional Healers |
| Prayer | Divination |
| Fasting | Herbs and charms |
| Counselling | Appeasement of spirits believed to cause the disease |
Key observations:
- Both Christian and Muslim clerics recognise the need for modern medical services alongside faith interventions
- Muslim clerics also use herbs in their practice
- Emotional trauma was identified as a major threat to treatment adherence
- Prayer and fasting were considered effective for addressing this emotional trauma
- Combination of faith healing, spiritual consultation, and modern medicine represents the general treatment trend
8.2 Cultural Context
The study concluded that “culture and society provide the context for understanding the prevention and treatment of diseases.” The integration of faith healing with other approaches reflects the complex healthcare-seeking behaviour of Nigerian populations.
9. Herbal Medicine Preparation and Administration
9.1 Common Preparation Methods
Based on ethnobotanical surveys, the predominant preparation methods for Nigerian antisickling herbs are:
| Method | Description | Prevalence |
| Decoction | Boiling plant material in water | Most common method |
| Infusion | Steeping in hot water (like tea) | Common for leaves |
| Maceration | Soaking in cold water or solvents | Used for delicate parts |
| Powdered formulations | Dried plant material ground and encapsulated | Used for some formulations |
9.2 Plant Parts Used
According to surveys across multiple states:
- Leaves form the major part of plant materials used
- Bark and roots are also commonly used
- In some formulations, fruits and seeds are utilised
10. Safety Considerations and Clinical Implications
10.1 Key Safety Concerns
| Concern | Implication |
| Lack of standardisation | Variable potency and possible contamination |
| Potential toxicity | Some plants may be hepatotoxic or nephrotoxic at high doses |
| Drug interactions | Herbal remedies may interact with hydroxyurea or other medications |
| Limited safety data | Most evidence focuses on efficacy rather than safety |
| Disclosure issues | Healthcare providers may not be aware of concurrent herbal use |
10.2 Healthcare Provider Challenges
The survey of adolescents revealed that healthcare providers often disapprove of NPI use, yet patients continue using them. This creates a communication gap between patients and providers, preventing:
- Assessment of potential interactions
- Monitoring for adverse effects
- Evidence-based guidance on safe complementary therapy
10.3 Recommendations
Based on the literature, the following recommendations are suggested:
For Patients:
- Disclose all herbal and NPI use to healthcare providers
- Use products from reputable sources where possible
- Monitor for adverse effects and report immediately
- Maintain conventional treatment (hydroxyurea, folic acid, antimalarials)
- Seek guidance before combining multiple therapies
For Healthcare Providers:
- Ask about herbal and NPI use during consultations
- Provide culturally sensitive, evidence-based guidance
- Monitor patients for interactions and adverse effects
- Document complementary therapy use
- Support research on safety and efficacy of NPIs
For Researchers:
- Conduct controlled clinical trials on commonly used herbs
- Evaluate safety profiles for chronic use
- Study drug interactions with standard medications
- Identify and characterise active compounds
11. Research Gaps and Future Directions
11.1 Key Research Needs
| Area | Priority |
| Human clinical trials | Most evidence from in vitro and animal models |
| Long-term safety studies | Chronic use effects on liver, kidney, other organs |
| Drug interaction studies | Interactions with hydroxyurea, antibiotics, antimalarials |
| Standardised dosing protocols | Defined dosing for herbal formulations |
| Pharmacokinetic studies | Absorption, distribution, metabolism, elimination |
| Combination therapy studies | Herbal + conventional treatment interactions |
| Quality control methods | Affordable quality assurance methods |
11.2 Opportunities
- Development of simplified NIPRISAN formulations: The US FDA suggested a simpler formulation with chemical fingerprinting and elucidation of active compounds
- Functional foods: Edible plants with antisickling properties could be developed for prevention
- Cannabinoid/vanilloid research: Further investigation of pain relief mechanisms
- Nutraceutical development: Standardised nutritional supplements for SCD management
12. Conclusion
Nigeria bears the greatest burden of sickle cell disease globally, with approximately 150,000 new cases annually. The management of this chronic condition has been significantly influenced by traditional medicine, which remains deeply embedded in Nigerian healthcare practices, particularly in rural communities where conventional treatments are often inaccessible or unaffordable.
The scientific validation of Nigerian herbal remedies has progressed considerably:
- NIPRISAN® represents the most significant achievement, developed from a traditional Yoruba recipe and approved for use in Nigeria since 2006, with US FDA clearance for Phase III trials
- Multiple scientific studies have validated antisickling activities of Nigerian plants including Khaya senegalensis (95.29% reversal activity), Vernonia amygdalina (92.19%), Alchornea cordifolia (98.12% inhibition), and Combretum platypterum (89.8%)
- Nutraceuticals have demonstrated potential benefits, with significant improvements in haematocrit (22.8% to 27.2%) and crisis frequency (7.4 to 3.2 episodes) over six months
- Non-pharmacological interventions including massage, prayer, and heat application are used by 77% of adolescents with SCD to manage crisis pain
However, challenges remain:
- Limited human clinical trial data for most remedies
- Safety concerns including potential drug interactions
- Disclosure gaps between patients and healthcare providers
- Lack of standardisation for many herbal products
The path forward requires:
- Acknowledging and respecting traditional knowledge while subjecting it to rigorous scientific scrutiny
- Strengthening regulatory oversight of herbal products through NAFDAC
- Promoting open communication between patients and healthcare providers
- Investing in clinical research on safety, efficacy, and mechanisms of action
- Developing integration strategies that combine the best of both systems
- Preserving and documenting indigenous knowledge before it is lost
As Nigeria continues its fight against sickle cell anaemia, the careful integration of evidence-based traditional medicine into the healthcare system offers promising strategies for improving the quality of life of those living with this challenging condition.
13. References
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