Largactil
Largactil
- In the UK and most countries Largactil (chlorpromazine) is supplied through community and hospital pharmacies and licensed suppliers and is a prescription-only medicine; it should be obtained on a prescription from a prescriber.
- Largactil is used to treat schizophrenia and other psychoses, acute mania, severe nausea and vomiting, intractable hiccups and preoperative anxiety; it acts primarily as a dopamine (D2) receptor antagonist with additional serotonergic, histaminic and adrenergic receptor blocking effects.
- Usual doses vary by indication: adults for psychosis often start 25–100 mg three times daily with typical maintenance 200–800 mg/day divided; antiemetic dosing 10–25 mg every 4–6 hours; IM/IV preparations commonly 25 mg (25 mg/mL) for acute agitation; children use weight-based dosing ~0.5–0.55 mg/kg per dose every 4–6 hours; elderly start at lower doses (about half) and titrate cautiously.
- Available as oral tablets (10, 25, 50, 100, 200 mg), oral solution (commonly 10 mg/mL) and injectable ampoules/solutions for IM or IV use (commonly 25 mg/mL).
- Onset of effect is approximately 30–60 minutes after oral administration, 15–30 minutes after intramuscular injection and within minutes after intravenous injection for acute effects.
- Duration of action: sedative and antiemetic effects commonly last about 4–6 hours; antipsychotic effects may persist 12–24 hours or longer depending on dose and individual metabolism; elimination half-life is roughly 16–30 hours.
- Do not drink alcohol while taking Largactil — concomitant alcohol markedly increases sedation, respiratory depression and the risk of severe hypotension.
- The most common side effect is drowsiness/sedation (other frequent effects include dry mouth, orthostatic hypotension, constipation and extrapyramidal symptoms).
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Basic Largactil Information
- INN (International Nonproprietary Name): Chlorpromazine.
- Brand Names Available In United Kingdom: Largactil (tablets, oral solution, injection).
- ATC Code: N05AA01 — Phenothiazines with aliphatic side‑chain; chlorpromazine is a first‑generation (typical) antipsychotic.
- Forms & Dosages: Tablets 10 mg, 25 mg, 50 mg, 100 mg, (200 mg listed in some countries); oral solution commonly 10 mg/mL; injection commonly 25 mg/mL.
- Manufacturers In United Kingdom: Historically marketed as Largactil by Sanofi; current supply dominated by generic manufacturers (chlorpromazine hydrochloride) and multiple global generic suppliers.
- Registration Status In United Kingdom: Registered and supplied under brand and generic names; packaging and indications may vary by supplier.
- OTC / Rx Classification: Prescription‑only (Rx) in all jurisdictions.
Latest Research Highlights
What Has Changed In UK And EU Studies Between 2022–2025?
Recent UK and European pharmacovigilance and observational work highlights three consistent themes for chlorpromazine.
The drug retains niche clinical utility for acute settings while long‑term prescribing shifts toward atypicals.
Safety monitoring emphasises cardiac conduction (QTc), extrapyramidal symptoms (EPS) and rare but serious events such as neuroleptic malignant syndrome.
| Study Type | Population | Outcome | Safety Signals |
|---|---|---|---|
| Pragmatic NHS Studies | Acute psychosis, emergency wards | Effective rapid control when given parenterally | Increased sedation, EPS reports |
| Observational Registries | Older adults, dementia care settings | Prescribing declined for maintenance; used in crises | Class signal: higher mortality in dementia |
| Pharmacovigilance Analyses (MHRA/Yellow Card) | All ages across UK | Reports concentrated on acute EPS and cardiac issues | QT prolongation and conduction abnormalities |
| Small RCTs / Case Series | Refractory hiccups, severe behavioural disturbance | Symptom relief reported; RCT evidence limited | Typical antipsychotic adverse event profile |
- Key Takeaway: Chlorpromazine remains useful for acute psychosis, severe agitation and selected off‑label uses where alternatives are unsuitable.
- Key Takeaway: Prescribing patterns in the NHS continue to favour atypicals for maintenance because of lower long‑term EPS risk.
- Key Takeaway: MHRA Yellow Card data and EU post‑marketing reports concentrate on EPS and cardiac conduction issues and advise caution in elderly/dementia.
Clinical Effectiveness In The UK
How Well Does Largactil Work In NHS Practice?
Chlorpromazine (Largactil) is still effective for rapid control of severe agitation and acute psychosis, especially when given by injection.
Real‑world NHS audits report fast symptomatic improvement with parenteral use during short inpatient stays.
Oral maintenance is less favoured because of extrapyramidal symptoms and anticholinergic burden compared with atypical antipsychotics.
- PANSS: Positive And Negative Syndrome Scale — used to measure psychosis symptom change.
- CGI: Clinical Global Impression — clinician rating of illness severity and improvement.
- Time‑To‑Discharge: Practical outcome measure in acute admissions and liaison psychiatry audits.
| Setting | Effectiveness | Tolerability Issues |
|---|---|---|
| Acute (Parenteral) | Rapid symptomatic control; commonly used in emergency wards | Sedation, orthostatic hypotension |
| Maintenance (Oral) | Effective for positive symptoms but less used long‑term | EPS, anticholinergic effects, weight gain |
Link To Practice: MHRA guidance and local trust formularies commonly recommend lowest effective dose and ECG monitoring for patients with cardiac risk factors.
Indications And Expanded Uses
What Is Chlorpromazine Licensed For And When Is It Used Off‑Label?
- MHRA‑Recognised / Common Uses: Psychotic disorders, severe behavioural disturbance, preoperative sedation.
- Formulations Available In UK: Largactil tablets (10, 25, 50, 100 mg), oral solution and injection (25 mg/mL).
- Off‑Label Uses (Secondary Care / Palliative): Refractory hiccups, severe nausea when other antiemetics fail, adjunctive management of acute behavioural crises.
- Specialist Use: Treatment‑resistant psychosis in cases where clozapine is unsuitable may be considered by specialists in secondary care or private clinics.
| Indication | Typical Starting Dose |
|---|---|
| Schizophrenia / Psychosis | 25–100 mg three times daily oral; maintenance 200–800 mg/day divided |
| Nausea / Vomiting | 10–25 mg orally every 4–6 hours |
| Preoperative Anxiety | 25–50 mg one hour before procedure |
| Refractory Hiccups | Low single doses (10–50 mg) until symptoms resolve |
Note: Always follow local trust formularies and obtain informed consent when prescribing off‑label uses.
Composition And Brand Landscape
What Exactly Is In Largactil And Who Makes It?
| Brand Name | Form | Common Strengths |
|---|---|---|
| Largactil (UK) | Tablets, Oral Solution, Injection | 10 mg, 25 mg, 50 mg, 100 mg |
| Thorazine (US) | Tablets, Injectable | 10 mg, 25 mg, 50 mg, 100 mg, 200 mg; injection 25 mg/mL |
| Generic Chlorpromazine | Tablets, Vials | Various strengths depending on manufacturer |
- Active Ingredient: Chlorpromazine hydrochloride (INN).
- INN vs Brand vs Generic: INN is chlorpromazine; Largactil is the historic UK brand; generic chlorpromazine contains the same active ingredient and commonly supplies NHS procurement.
- Supply Notes: Sanofi historically marketed Largactil, but generics now dominate hospital and community procurement.
Contraindications And Special Precautions
Who Should Avoid Largactil Or Take Extra Care?
- Absolute Contraindications: Comatose states, severe bone‑marrow depression, pheochromocytoma, known hypersensitivity to phenothiazines, infants under six months.
- Relative Contraindications: Hepatic or renal impairment, cardiac disease (arrhythmias, QT prolongation), history of seizures, Parkinson’s disease, dementia and elderly patients.
- Pregnancy And Breastfeeding: Discuss risk–benefit on the maternity unit; specialist advice advised for dosing and monitoring.
- Lifestyle Restrictions: Avoid alcohol due to additive CNS depression and cardiovascular risk; advise caution driving until stable.
| Contraindication | Monitoring Or Action |
|---|---|
| Cardiac Disease / QT Risk | Baseline ECG and periodic monitoring; avoid with other QT‑prolonging drugs |
| Hepatic/Renal Impairment | Reduce dose and increase clinical monitoring |
| Elderly / Dementia | Start at lower doses; monitor for hypotension, falls and increased mortality risk |
Dosage Guidelines
How Is Largactil Usually Dosed In NHS Practice?
| Indication | Starting Dose | Monitoring |
|---|---|---|
| Acute Psychosis (Adult) | 25–100 mg oral three times daily; adjust to effect | Monitor for EPS, sedation, blood pressure |
| Maintenance (Adult) | Typical maintenance 200–800 mg/day divided | Regular medication review, movement disorder monitoring |
| Acute Agitation (IM) | Injection 25 mg/mL single or repeated per local protocol | Observe for sedation, respiratory depression, hypotension |
| Children | Approximately 0.5–0.55 mg/kg per dose; titrate cautiously | Pediatric specialist review and weight‑based monitoring |
- Titration: Increase gradually to the lowest effective dose and review regularly.
- Missed Doses: Take as soon as remembered unless close to next dose; do not double dose.
- Overdose: Seek emergency medical assistance; overdose risks include severe drowsiness, hypotension and respiratory depression.
Interactions Overview
Which Drugs, Foods And Substances Increase Risk With Chlorpromazine?
Chlorpromazine interacts with drugs that cause CNS depression, prolong QT interval or have strong anticholinergic effects.
- High‑Risk Classes: Opioids, benzodiazepines and other sedatives — additive CNS depression and respiratory risk.
- QT‑Prolonging Drugs: Macrolide antibiotics, certain SSRIs and some antiarrhythmics — additive cardiac conduction risk.
- Anticholinergic Agents: Increased anticholinergic burden raises risk of confusion, urinary retention and constipation.
| Drug Class | Risk | Action |
|---|---|---|
| Opioids / Benzodiazepines | Excessive sedation and respiratory depression | Avoid combination or reduce doses; close monitoring |
| Macrolides / Some SSRIs | Increased QT prolongation risk | Check ECG; avoid or choose safer alternatives |
| Other Antimuscarinics | Worsening anticholinergic effects | Review regimen and monitor cognition and bowel function |
Report any suspected interactions or adverse reactions via the MHRA Yellow Card scheme.
Cultural Perceptions And Patient Habits
What Do Patients Say About Largactil In The UK?
Online patient forums and trust feedback show mixed views: respect for the drug’s history but worry about sedation and movement side‑effects.
Many patients report preferring pharmacist counselling at community chains or hospital pharmacies when starting Largactil.
- Common Concerns: Sedation, weight gain and extrapyramidal symptoms affecting daily life and adherence.
- Stigma: Some communities view older antipsychotics warily and ask about modern alternatives.
- Digital Support: Electronic prescriptions and NHS patient portals are increasingly used for medication reviews and questions.
- Support Resources: NHS 111, local Community Mental Health Teams, MHRA Yellow Card.
- Pharmacy Support: Community pharmacists at Boots, LloydsPharmacy or hospital pharmacy teams can provide counselling and liaise with prescribers.
Availability And Pricing Patterns
How Can Patients Get Largactil And What Will It Cost?
| Channel | Availability | Typical Notes |
|---|---|---|
| Hospital Pharmacy | Commonly stocked for inpatient use | Trust formulary determines preferred preparation |
| Community Pharmacy (Boots, Lloyds, Superdrug) | May dispense on prescription; generics stocked | Pharmacist counselling available |
| Online Pharmacies | Available via MHRA‑registered pharmacies with valid prescription | Electronic prescriptions and home delivery growing |
Regional Prescription Charges: Prescriptions in England attract the standard NHS charge per item unless the patient is exempt.
Prescriptions are free in Scotland, Wales and Northern Ireland, which creates regional cost differences.
For convenience, our online pharmacy can supply Largactil on receipt of a valid prescription, with discreet delivery to United Kingdom in 5–14 days.
Comparable Medicines And Prescribing Preferences
What Are The Alternatives In NHS Practice And Why Choose One Over Another?
| Pros | Cons |
|---|---|
| Effective for positive symptoms; useful and inexpensive for acute control | Higher risk of EPS, anticholinergic effects and sedation |
| Atypicals (e.g., risperidone, olanzapine) have lower long‑term EPS risk for many patients | Some atypicals carry metabolic risks and can be costlier |
- Checklist For Prescribers: Match drug to symptom profile, review comorbidities (cardiac, hepatic, metabolic), consider side‑effect tolerance and follow NICE/MHRA monitoring recommendations.
- Acute Agitation Alternatives: Haloperidol and olanzapine are commonly used alternatives for emergency control.
Frequently Asked Questions
- Will Largactil Make Me Very Sleepy? Sedation is common, especially when starting or after dose increases; taking doses at night may help and discuss driving/work with your prescriber.
- Is Largactil Safe In Older People? Older adults have increased risks such as falls, hypotension and a higher risk signal in dementia; clinicians generally start at lower doses and monitor closely.
- Can I Drink Alcohol While On Chlorpromazine? No; alcohol increases sedation and cardiovascular risk and should be avoided.
- How Do I Report Side‑Effects? Use the MHRA Yellow Card online or speak to your pharmacist or GP who can submit a report on your behalf.
Data Highlight: Report side‑effects via the MHRA Yellow Card and check NHS patient portals for medication review appointments.
Guidelines For Proper Use
What Should A Pharmacist Tell Someone Starting Largactil?
- Start By Explaining Why The Medicine Has Been Prescribed And Expected Onset Of Effect.
- Describe Common Side‑Effects: Sedation, dry mouth, blurred vision, constipation, orthostatic hypotension and possible weight gain.
- Explain Serious Risks And Red‑Flag Symptoms: Acute muscle stiffness, high fever and confusion (neuroleptic malignant syndrome); persistent involuntary movements (tardive dyskinesia); palpitations or fainting which may indicate arrhythmia.
- Practical Advice: Store at room temperature (20–25°C), avoid alcohol, do not drive until stable and carry out regular medication reviews via the GP or community mental health team.
Suggested Counselling Phrases For Pharmacists:
- “This medication helps with agitation and psychosis; expect sedation early on and report any unusual muscle stiffness straight away.”
- “Avoid alcohol and check with us before combining with other sedatives or medications that could affect your heart rhythm.”
Red‑Flag Symptoms Warranting Emergency Review Include:
- Severe shortness of breath or fainting.
- High fever with muscle rigidity.
- Severe uncontrollable movements or sudden marked confusion.
Delivery Across United Kingdom
| City | Region | Delivery Time |
|---|---|---|
| London | England | 5–7 days |
| Birmingham | England | 5–7 days |
| Manchester | England | 5–7 days |
| Glasgow | Scotland | 5–7 days |
| Leeds | England | 5–7 days |
| Edinburgh | Scotland | 5–7 days |
| Liverpool | England | 5–7 days |
| Bristol | England | 5–9 days |
| Cardiff | Wales | 5–9 days |
| Belfast | Northern Ireland | 5–9 days |
| Sheffield | England | 5–9 days |
| Newcastle Upon Tyne | England | 5–9 days |
| Leicester | England | 5–9 days |