Key facts
- Type: Antipsychotic · Second-Generation Antipsychotic
- ATC Code: N05AX08
- Kenya EML 2023: Listed
- Level of Use: Level 4 to 6
This is health education, not medical advice. Never start, stop, or change a medication without speaking to a qualified healthcare professional first.
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Prescription Only Medicine
Available on prescription. Regular monitoring of weight and metabolic health is part of safe long-term use.
What it treats
Which conditions is Risperidone used for?
Schizophrenia · Bipolar Disorder · Autism Spectrum Disorder · Acute Psychosis
Overview
What is Risperidone?
Risperidone is a second-generation antipsychotic developed to maintain the effectiveness of older medicines for psychosis while reducing the movement-related side effects many people found difficult to live with.
It is listed in Kenya’s Essential Medicines List 2023 and available as an affordable generic in both public and private facilities. It is currently the most widely used atypical antipsychotic in Kenya.
It is also approved for use in children and adolescents for certain conditions, including irritability associated with autism spectrum disorder, making it one of the few antipsychotics with a paediatric indication.
How it works
What does it do in the brain?
Risperidone works by blocking both dopamine and serotonin receptors in the brain. The dopamine-blocking effect reduces psychotic symptoms. The serotonin-blocking effect partially offsets movement side effects. However, risperidone has a stronger effect on prolactin than most other antipsychotics, which can lead to hormonal side effects.
Formulations in Kenya
How is it available?
Tablet 0.5 mg to 4 mg range Taken by mouth Available
Oral solution 1 mg/mL Taken by mouth Available, mainly private
Long-acting injection Every 2 weeks Given by a nurse or doctor Available at specialist centres
Availability across Africa
Where is it available in Africa and what is it called?
Names and availability vary by country. Always confirm with a local pharmacist or healthcare provider.
| Country | Common Brand Name(s) | Notes |
|---|---|---|
| Kenya | Risperdal, Risnia, Risdone, generic | On KEML 2023. Available at public and private facilities. |
| South Africa | Risperdal, Rispolept, generic | On South Africa EML. Widely available including LAI. |
| Nigeria | Risperdal, Sizodon, generic | Available at teaching hospitals and urban pharmacies. |
| Uganda | Generic risperidone | Available at national referral hospitals and urban pharmacies. |
| Tanzania | Generic risperidone | Available at regional referral hospitals. |
| Ethiopia | Generic risperidone | Available at Amanuel Hospital and major private pharmacies. |
| Ghana | Risperdal, generic | Available at teaching hospitals and specialist facilities. |
| Rwanda | Generic risperidone | Available within the national health system. |
| Zambia | Generic risperidone | Available at University Teaching Hospital and private pharmacies. |
Side effects
What might you feel while taking it?
These are the most commonly reported effects. Not everyone experiences them, and many settle within the first few weeks.
- Weight gain, which is common and clinically important to monitor
- Sedation and fatigue
- Movement side effects at higher doses
- Hormonal effects including menstrual changes and breast tenderness in both men and women
- Dizziness on standing
- Changes in blood sugar and cholesterol levels over time
Go to a doctor or emergency room straight away if you notice any of the following.
- Involuntary repetitive movements that develop after long-term use
- Very high fever, severe muscle rigidity, and confusion at the same time. Emergency care required.
- Elderly patients with dementia have a higher risk of stroke on antipsychotics
Risks
Important risks you should understand before taking this medicine
Read this section carefully.
These are real risks associated with this medicine that every person taking it should be aware of.
- Metabolic syndrome is a significant risk with risperidone. Weight gain, rising blood sugar, and worsening cholesterol all occur and increase the long-term risk of diabetes and heart disease. Metabolic monitoring from the start is not optional.
- Risperidone causes more hormonal disruption than most other antipsychotics through its effect on prolactin. This can cause menstrual irregularities, milk production unrelated to pregnancy, and breast changes in both men and women. These effects reduce bone density over time if left unmonitored.
- Cerebrovascular events, including stroke, occur at higher rates in elderly patients with dementia who are given risperidone. Its use in this group requires explicit risk-benefit assessment.
- Movement side effects are lower than with first-generation antipsychotics but not absent, particularly at higher doses. Tardive dyskinesia can develop with long-term use.
- Stopping risperidone abruptly, particularly the long-acting injection, can lead to a rapid return of severe psychotic symptoms.
Who should not take it
Important warnings before starting
Tell your doctor about all your medical conditions, allergies, and other medicines before starting Risperidone.
- Known allergy or previous serious reaction to risperidone or paliperidone
- Elderly people with dementia should only take this medicine under careful specialist guidance
Special care needed
Situations that need extra attention
- Weight, blood sugar, and cholesterol must be monitored from the start
- Tell your doctor if you have Parkinson’s disease, as antipsychotics can worsen motor symptoms
- Tell your doctor about any kidney problems
- Elderly patients need lower doses and closer monitoring
Pregnancy
Speak to your doctor before making any changes to your treatment if you are pregnant or planning a pregnancy.
Breastfeeding
Risperidone passes into breast milk. Specialist guidance is needed before breastfeeding while taking this medicine.
Other medicines
Medicines and substances that can interact with it
Always tell your doctor and pharmacist about every medicine, supplement, and herbal remedy you take, including those bought without a prescription.
- Carbamazepine: Significantly reduces the level of risperidone in the blood, which may reduce how well it works.
- Certain antidepressants affecting the same liver enzymes: Can raise risperidone levels, increasing side effects.
- Alcohol and sedating medicines: Sedation is amplified.
Tests and follow-up
What your doctor will monitor
- Weight and waist at every visit
- Blood sugar and cholesterol at baseline, three months, and annually
- Blood pressure at initiation
- Movement side effects at each review
- Hormonal symptoms should be reported
Stopping this medicine
What happens if you stop taking it?
Do not stop risperidone suddenly. Gradual reduction under medical supervision is needed to prevent return of symptoms.
In Kenya
What you should know about this medicine in Kenya
Risperidone is the most widely used second-generation antipsychotic in Kenya. Affordable generic versions are available in both public and private health facilities.
Weight gain and metabolic changes are a particular concern given Kenya’s rising burden of diabetes. Proactive metabolic monitoring is an important part of long-term treatment.
The availability of a long-acting injectable formulation means that fortnightly clinic appointments can replace daily oral dosing for people who struggle with consistency.
Sources
References
- Ministry of Health, Kenya. (2023). Kenya Essential Medicines List 2023. Nairobi: Ministry of Health.
- Ministry of Health, Kenya. (2023). Kenya National Medicines Formulary, 1st Edition. Nairobi: Ministry of Health.
- Leucht, S., et al. (2013). Comparative efficacy and tolerability of 15 antipsychotic drugs. The Lancet, 382(9896), 951-962.
- World Health Organization. (2023). Model List of Essential Medicines, 23rd Edition. Geneva: WHO.