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ANQUIL is a brand name for Benperidol. The medicine, its uses, side effects and dosage are the same regardless of brand.
Used for: For the control of deviant anti-social sexual behaviour.
Verbatim from this product's MHRA label. Tap a section to expand.
5 mg/day in divided doses. Dosage is best initiated and adjusted under close clinical supervision as individual response to neuroleptic drugs is variable. In determining dosage, consideration should be given to the patient’s age, severity of symptoms and previous response to other neuroleptic drugs.
Patients who are debilitated, or those with previously reported adverse reactions to neuroleptic drugs, may require less Anquil, and half the normal starting dose may be sufficient for therapeutic response. In adolescents, a lower dose may be advisable.
Elderly Half the normal starting dose may be sufficient for therapeutic response. Paediatric population Not recommended. As with all medications the lowest effective dose should be used. Method of administration Oral.
The undesirable effects reported with Anquil during clinical trials and post- marketing surveillance are shown in the table below. They are listed by System-Organ Class (SOC) and in order of frequency, using the following convention: very common (≥1/10); common (≥1/100 to <1/10); uncommon (≥1/1,000 to <1/100); rare (≥1/10,000 to <1/1,000); very rare (<1/10,000); not known (cannot be estimated from the available data).
Table 1 Frequency of adverse events SOC Frequency Event Blood and lymphatic system disorders Not known Blood disorder1, granulocytopenia 1 Blood dyscrasias, including granulocytopenia. Immune system disorders Not known Hypersensitivity2 2 Reported effects have included oedema, skin rashes or hypersensitivity reactions such as exanthema and pruritus.
Endocrine disorders Not known Hyperprolactinaemia3, galactorrhoea, gynaecomastia, oligomenorrhoea 3 Hormonal effects of antipsychotic neuroleptic drugs include hyperprolactinaemia, which may cause galactorrhoea, gynaecomastia and oligo-or amenorrhoea.
g. tremor, muscle rigidity, hypersalivation, bradykinesia, akathisia, acute dystonia, oculogyric crisis and laryngeal dystonia. Anti-Parkinson agents should only be given as required; they should not be prescribed routinely as a preventive measure.
As with all antipsychotic agents, tardive dyskinesia may appear in some patients on long-term therapy or after drug discontinuation. The syndrome is mainly characterised by rhythmical involuntary movements of the tongue, face, mouth or jaw.
The manifestations may be permanent in some patients. Anquil should be given in the minimal effective dose for the minimum possible time. The syndrome may be masked when the treatment is reinstituted, when the dosage is increased or when a switch is made to a different antipsychotic drug.
Treatment should be discontinued as soon as possible. The potential seriousness and unpredictability of tardive dyskinesia and the fact that it has occasionally been reported to occur when neuroleptic antipsychotic drugs have been prescribed for relatively short periods in low dosage means that the prescribing of such agents requires especially careful assessment of risks versus benefit.
Rare cases of sudden and unexplained death have been reported in psychiatric patients receiving antipsychotic drugs. However, Anquil has not been clearly implicated in any case. Acute withdrawal symptoms, including nausea, vomiting and insomnia, have very rarely been described after abrupt cessation of high doses of antipsychotic drugs.
Relapse may also occur and gradual withdrawal is advisable. Where prolonged treatment with Anquil is envisaged, it would be a reasonable precaution to carry out regular blood counts and tests of liver function. Caution is advised in patients with liver disease, renal failure, cardiovascular disease, epilepsy, and conditions predisposing to epilepsy and convulsions.
As with other neuroleptics, cases of QT interval prolongation may occur. Consequently, and if the clinical situation permits, absence of the following risk factors for onset of this type of arrhythmia should be verified prior to administration: • Cardiac disease.
• A family history of sudden death and/or QT prolongation. • Uncorrected electrolyte disturbances. • A history of QT interval prolongation, ventricular arrhythmias or Torsades de Pointes. Prior to initiation of treatment with Anquil, it may be appropriate to consider an ECG with measurement of serum calcium, magnesium and potassium levels.
This is especially important in the elderly and patients with a positive personal or family history of cardiac disease or abnormal findings on cardiac clinical examination. During therapy, periodic serum electrolyte levels may be monitored and corrected if necessary, especially during long-term usage; if concomitant diuretics are taken; or during inter-current illness.
Concomitant neuroleptics should be avoided. An ECG may be appropriate to assess the QT interval whenever dose escalation is proposed and when the maximum therapeutic dose is reached. The dose of Anquil should be reduced if the QT interval is prolonged and discontinued if the QTc interval is greater than 500ms.
1. Hypersensitivity to other butyrophenones. Comatose states. Patients with extrapyramidal symptoms, CNS depression, depressive disorders or Parkinson’s disease.
Not medical advice. Always read the patient information leaflet and follow your prescriber or pharmacist.
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Tardive dyskinesia can be precipitated or aggravated by anti-Parkinson drugs. Tardive dyskinesia may occur after abrupt drug withdrawal. It has been reported that fine vermicular movements of the tongue may be an early sign of SOC Frequency Event tardive dyskinesia and that the full syndrome may not develop if the medication is stopped at that time.
If signs and symptoms of tardive dyskinesia appear, the discontinuation of all neuroleptic drugs should be considered. As with other neuroleptics, rare cases of neuroleptic malignant syndrome, an idiosyncratic response characterised by hyperthermia, generalised muscle rigidity, autonomic instability, altered consciousness, coma and elevated CPK levels, have been reported.
Signs of autonomic dysfunction such as tachycardia, labile arterial pressure and sweating may precede the onset of hyperthermia, acting as early warning signs. Antipsychotic treatment should be withdrawn immediately and appropriate supportive therapy and careful monitoring instituted.
Anquil, even in low dosage in susceptible (especially non-psychotic) individuals, may cause unpleasant subjective feelings of being mentally dulled or slowed down, dizziness, headache, or paradoxical effects of excitement, agitation or insomnia.
Depression and seizures have been reported rarely. A causal relationship with Anquil has not been unequivocally established. Uncommon Hypotension Rare Ventricular tachycardia Cardiac disorders5 Not known Tachycardia, Electrocardiogram QT prolonged, ventricular arrhythmias, ventricular fibrillation, Torsades de Pointes and cardiac arrest 5 Dose-related hypotension can occur, particularly in the elderly who are more susceptible to the sedative and hypotensive effects.
Benign tachycardia has occasionally been reported. As with other neuroleptics Electrocardiogram QT prolonged, ventricular arrhythmias (including ventricular fibrillation and rarely ventricular tachycardia), Torsades de Pointes and cardiac arrest may occur.
In rare cases this may lead to sudden “unexplained” death. Treatment of undesirable cardiac effects includes withdrawal of the causal agent, and correction of hypoxia, electrolyte abnormalities and acid base disturbances. Vascular disorders6 Not known Embolism venous, pulmonary embolism, deep vein thrombosis 6 Cases of venous thromboembolism, including cases of pulmonary embolism and cases of deep vein thrombosis have been reported with antipsychotic drugs.
Gastrointestinal disorders Not known Nausea, vomiting, decreased appetite, constipation, dyspepsia, salivary hypersecretion Hepatobiliary disorders Not known Jaundice, hepatic function abnormal7 7 Transient abnormalities of liver function in the absence of jaundice have been reported.
6) General disorders and administration site conditions Rare Oedema, hyperthermia Investigations Not known Body temperature fluctuation, blood creatine phosphokinase increased Reporting of suspected adverse reactions Reporting suspected adverse reactions after authorisation of the medicinal product is important.
It allows continued monitoring of the benefit/risk balance […]
An approximately 3-fold increased risk of cerebrovascular adverse events has been seen in randomised placebo controlled clinical trials in the dementia population with some atypical antipsychotics. The mechanism for this increased risk is not known.
An increased risk cannot be excluded for other antipsychotics or other patient populations. Benperidol should be used with caution in patients with risk factors for stroke. Patients with rare hereditary problems of galactose intolerance, total lactase deficiency or glucose-galactose malabsorption should not take this medicine as it contains lactose.
Cases of venous thromboembolism (VTE) have been reported with antipsychotic drugs. Since patients treated with antipsychotics often present with acquired risk factors for VTE, all possible risk factors for VTE should be identified before and during treatment with Anquil and preventive measures undertaken.
Increased Mortality in Elderly people with Dementia Data from two large observational studies showed that elderly people with dementia who are treated with antipsychotics are at a small increased risk of death compared with those who are not treated.
There are insufficient data to give a firm estimate of the precise magnitude of the risk and the cause of the increased risk is not known. Anquil is not licensed for the treatment of dementia-related behavioural disturbances.