Key facts
- Type: Anticholinergic Medicine · Anti-EPS Agent
- ATC Code: N04AA02
- Kenya EML 2023: Listed
- Level of Use: Level 3-6
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
Usually prescribed alongside a first-generation antipsychotic to manage movement side effects.
What it treats
Which conditions is Biperiden used for?
Antipsychotic-induced movement side effects · Acute muscle spasm (dystonia)
Overview
What is Biperiden?
Biperiden is an anticholinergic medicine prescribed specifically to treat the movement-related side effects that can be caused by first-generation antipsychotic medicines such as haloperidol and chlorpromazine.
These movement side effects, which include painful muscle spasms, stiffness, a shuffling walk, and intense inner restlessness, are collectively called extrapyramidal symptoms. They are common with older antipsychotics and can be very distressing. Biperiden effectively relieves them.
It is listed in Kenya’s Essential Medicines List 2023 at Level 3, alongside haloperidol, reflecting the expectation that both medicines are used together.
How it works
What does it do in the brain?
Antipsychotics cause movement side effects by reducing dopamine activity in the parts of the brain that control movement. Biperiden counteracts this by blocking acetylcholine, which becomes relatively overactive when dopamine is reduced. Restoring this balance alleviates the movement problems.
Formulations in Kenya
How is it available?
Tablet 2 mg Taken by mouth Widely available
Injection 5 mg/mL Given by a healthcare professional Available at hospital level
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 |
|---|---|---|
| Uganda | Akineton, Biperiden (generic) | On the Uganda EML; dispensed alongside haloperidol at most government hospitals. |
| Tanzania | Akineton, Biperiden (generic) | On the Tanzania EML; standard co-prescription with first-generation antipsychotics. |
| Ethiopia | Biperiden (generic) | On the Ethiopian EML; widely dispensed with haloperidol and chlorpromazine at all levels. |
| Rwanda | Biperiden (generic) | Available through the RBC pharmacy network alongside antipsychotics. |
| South Africa | Akineton, Biperiden (generic) | Available in public sector; used alongside first-generation antipsychotics for EPS management. |
| Nigeria | Akineton, Biperiden (generic) | Available at government hospitals alongside haloperidol; widely recognised as essential co-prescription. |
| Ghana | Biperiden (generic) | Available at all psychiatric facilities alongside antipsychotics on the Ghana EML. |
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.
- Dry mouth
- Constipation
- Blurred vision
- Difficulty passing urine
- Faster heartbeat
- Mild memory or concentration difficulties, particularly in elderly patients
Go to a doctor or emergency room straight away if you notice any of the following.
- In older patients or at higher doses, biperiden can cause confusion, disorientation, and delirium
- Severe constipation left untreated can progress to a bowel obstruction
- Note: biperiden does not treat tardive dyskinesia and may make it worse. Tell your doctor if you develop involuntary repetitive movements
Who should not take it
Important warnings before starting
Tell your doctor about all your medical conditions, allergies, and other medicines before starting Biperiden.
- A specific type of glaucoma called closed-angle glaucoma
- Severe constipation or bowel obstruction
- Significant prostate enlargement causing difficulty urinating
Special care needed
Situations that need extra attention
- Elderly patients are more sensitive to the cognitive and constipating effects
- Tell your doctor if you develop new involuntary repetitive movements
- Bowel function should be discussed at every appointment
- Your doctor will periodically assess whether biperiden is still needed
Pregnancy
Use only if clearly necessary. Speak to your doctor.
Breastfeeding
Not recommended. Anticholinergic effects can affect the infant.
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.
- Other medicines with anticholinergic effects: Effects on dry mouth, constipation, urinary retention, and cognitive function are amplified.
- Alcohol: Amplifies drowsiness and cognitive impairment.
Tests and follow-up
What your doctor will monitor
- Bowel function at every appointment
- Cognitive state, particularly in elderly patients on multiple medicines
- Periodic review of whether biperiden is still needed as antipsychotic treatment is adjusted
Stopping this medicine
What happens if you stop taking it?
When biperiden is no longer needed, it can be reduced gradually. Stopping abruptly in people still on antipsychotics may cause a temporary return of movement symptoms.
In Kenya
What you should know about this medicine in Kenya
Biperiden is among the most frequently dispensed mental health medicines in Kenya, co-prescribed with haloperidol and chlorpromazine at health centre level. Its availability at Level 3 alongside these antipsychotics is a practical necessity.
Acute dystonia, painful and sudden muscle spasms often affecting the neck, jaw, or eyes, can be frightening and occurs most commonly in young men starting haloperidol. A biperiden injection brings rapid relief.
Regular review of the need for biperiden should be built into routine follow-up, as treatment stabilises and antipsychotic doses are reviewed, the ongoing need should be reassessed.
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.
- World Health Organization. (2023). Model List of Essential Medicines, 23rd Edition. Geneva: WHO.