POM: Prescription only medicine
This information is intended for use by health professionals
Amisulpride 50mg Tablets
Each tablet contains 50mg Amisulpride
White to off-white round tablets with break line on one side and '50' on other.
Amisulpride 50mg Tablets are indicated for the treatment of acute and chronic schizophrenic disorders, in which positive symptoms (such as delusions, hallucinations, thought disorders) and/or negative symptoms (such as blunted affect, emotional and social withdrawal) are prominent, including patients characterised by predominant negative symptoms.
For acute psychotic episodes, oral doses between 400 mg/d and 800 mg/d are recommended. In individual cases, the daily dose may be increased up to 1200 mg/d. Doses above 1200 mg/d have not been extensively evaluated for safety and therefore should not be used. No specific titration is required when initiating the treatment with amisulpride. Doses should be adjusted according to individual response.
For patients with mixed positive and negative symptoms, doses should be adjusted to obtain optimal control of positive symptoms.
Maintenance treatment should be established individually with the minimally effective dose.
For patients characterised by predominant negative symptoms, oral doses between 50 mg/d and 300 mg/d are recommended. Doses should be adjusted individually.
Amisulpride can be administered once daily at oral doses up to 300 mg, higher doses should be administered bid.
The minimum effective dose should be used.
The safety of Amisulpride has been examined in a limited number of elderly patients. Amisulpride should be used with particular caution because of a possible risk of hypotension or sedation. Reduction in dosage may also be required because of renal insufficiency.
The efficacy and safety of amisulpiride from puberty to the age of 18 years have not been established. There are limited data available on the use of amisulpiride in adolescents in schizophrenia. Therefore, the use of amisulpiride from puberty to the age of 18 years is not recommended; in children up to puberty amisulpride is contraindicated, as its safety has not yet been established (see section 4.3).
Amisulpride is eliminated by the renal route. In renal insufficiency, the dose should be reduced to half in patients with creatinine clearance (CRCL) between 30-60 ml/min and to a third in patients with CRCL between 10-30 ml/min.
As there is no experience in patients with severe renal impairment (CRCL < 10 ml/min) particular care is recommended in these patients (see section 4.4).
Since the drug is weakly metabolised a dosage reduction should not be necessary.
• Hypersensitivity to the active substance or to any of the excipients listen in section 6.1
• Concomitant prolactin-dependent tumours e.g. pituitary gland prolactinomas or breast cancer (see section 4.4 and 4.8)
• Children before the onset of puberty
• Combination with levodopa (see Section 4.5)
• Combination with the following medication which could include torsades de pointes:
- Class Ia antiarrhythmic agents such as quinidine, disopyramide, procainamide
- Class III antiarrhythmic agents such as amiodarone, sotalol
– Other medicines such as bepidril, cisapride, sultopride, thioridazine, IV erythromycin, IV vincamine, halofantrine, pentamidine, sparfloxacin
As with other neuroleptics, Neuroleptic Malignant Syndrome, a potentially fatal complication, characterized by hyperthermia, muscle rigidity, autonomic instability, altered consciousness and elevated CPK, may occur. In the event of hyperthermia, particularly with high daily doses, all antipsychotic drugs including Amisulpride should be discontinued.
Hyperglycaemia has been reported in patients treated with some atypical antipsychotic agents, including amisulpride, therefore patients with an established diagnosis of diabetes mellitus or with risk factors for diabetes who are started on amisulpride, should get appropriate glycaemic monitoring.
Amisulpride is eliminated by the renal route. In cases of severe renal insufficiency, the dose should be decreased and intermittent treatment should be considered (see Section 4.2).
Amisulpride may lower the seizure threshold. Therefore patients with a history of epilepsy should be closely monitored during Amisulpride therapy.
In elderly patients, Amisulpride, like other neuroleptics, should be used with particular caution because of a possible risk of hypotension or sedation. Reduction in dosage may also be required because of renal insufficiency.
As with other antidopaminergic agents, caution should be also exercised when prescribing Amisulpride to patients with Parkinson's disease since it may cause worsening of the disease. Amisulpride should be used only if neuroleptic treatment cannot be avoided.
Acute withdrawal symptoms including nausea, vomiting and insomnia have very rarely been described after abrupt cessation of high doses of antipsychotic drugs. Recurrence of psychotic symptoms may also occur, and the emergence of involuntary movement disorders (such as akathisa, dystonia and dyskinesia) has been reported. Therefore, gradual withdrawal is advisable.
Prolongation of the QT interval
Caution should be exercised when amisulpride is prescribed in patients with known cardiovascular disease or family history of QT prolongation.
Concomitant antipsychotics should be avoided.
In randomized clinical trials versus placebo performed in a population of elderly patients with dementia and treated with certain atypical antipsychotic drugs, a 3-fold increase of the risk of cerebrovascular events has been observed. The mechanism of such risk increase is not known. An increase in the risk with other antipsychotic drugs, or other populations of patients cannot be excluded. Amisulpride should be used with caution in patients with stroke risk factors.
Increased Mortality in Elderly people with Dementia:
Elderly patients with dementia-related psychosis treated with antipsychotic drugs are at an increased risk of death. Analyses of seventeen placebo-controlled trials (modal duration of 10 weeks), largely in patients taking atypical antipsychotic drugs, revealed a risk of death in drug-treated patients of between 1.6 to 1.7 times the risk of death in placebo-treated patients. Over the course of a typical 10-week controlled trial, the rate of death in drug-treated patients was about 4.5%, compared to a rate of about 2.6% in the placebo group. Although the causes of death in clinical trials with atypical antipsychotics were varied, most of the deaths appeared to be either cardiovascular (e.g. heart failure, sudden death) or infectious (e.g., pneumonia) in nature. Observational studies suggest that, similar to atypical antipsychotic drugs, treatment with conventional antipsychotic drugs may increase mortality. The extent to which the findings of increased mortality in observational studies may be attributed to the antipsychotic drug as opposed to some characteristic(s) of the patients is not clear.
Amisulpride is not licensed for the treatment of dementia-related behavioural disturbances.
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 Amisulpride and preventive measures undertaken
Amisulpride may increase prolactin levels. Therefore, caution should be exercised and patients with a history or a family history of breast cancer should be closely monitored during Amisulpride therapy.
Benign pituitary tumour:
Amisulpride may increase prolactin levels. Cases of benign pituitary tumours such as prolactinoma have been observed during Amisulpride therapy (see section 4.8). In case of very high levels of prolactin or clinical signs of pituitary tumour (such as visual field defect and headache), pituitary imaging should be performed. If the diagnosis of pituitary tumour is confirmed, the treatment with Amisulpride must be stopped (see section 4.3)
Leukopenia, neutropenia and agranulocytosis have been reported with antipsychotics, including Amisulpride. Unexplained infections or fever may be evidence of blood dyscrasia (see section 4.8), and requires immediate haematological investigation.
Patients with rare hereditary problems of galactose intolerance, the total lactase deficiency or glucose-galactose malabsorption should not take this medicine.
Severe liver toxicity has been reported with amisulpride use. Patients should be instructed to report immediately signs such as asthenia, anorexia, nausea, vomiting, abdominal pain or icterus to a physician. Investigations including clinical examination and biological assessment of liver function should be undertaken immediately (see section 4.8).
COMBINATIONS WHICH ARE CONTRAINDICATED
Levodopa: reciprocal antagonism of effects between levodopa and neuroleptics. Amisulpride may oppose the effect of dopamine agonists e.g. bromocriptine, ropinirole
COMBINATIONS WHICH ARE NOT RECOMMENDED
Amisulpride may enhance the central effects of alcohol
COMBINATIONS WHICH REQUIRE PRECAUTIONS FOR USE
Medications which enhance the risk of torsades de pointes:
- Bradycardia-inducing medications such as beta-blockers, bradycardia-inducing calcium channel blockers such as diltiazem and verapamil, clonidine, guanfacine; digitalis
- Medications which induce hypokalaemia: hypokalaemic diuretics, stimulant laxatives, IV amphotericin B, glucocortocoids, tetracosactides
- Neuroleptics such as pimozide, haloperidon; imipramine, antidepressants; lithium
COMBINATIONS TO BE TAKEN INTO ACCOUNT
• CNS depressants including narcotics, anaesthetics, analgesics, sedative H1 antihistamines, barbiturates, benzodiazepines and other anxiolytic drugs, clonidine and derivatives
• Antihypertensive drugs and other hypotensive medications
• Co-administration of amisulpride and clozapine may lead to an increase in plasma levels of amisulpride
• Caution is advised when prescribing amisulpride with medicines known to prolong the QT interval, e.g., class IA antiarrythmics (e.g., quinidine, disopyramide) and class III antiarrythmics (e.g. amiodarone, Sotalol), some antihistaminics, some other antipsychotics and antimalarials (e.g., mefloquine) (see section 4.4)
There are only limited data available from the use of amisulpride in pregnant women. The safety of amisulpride during human pregnancy has not been established. Amisulpride crosses the placenta. Studies in animals have shown reproductive toxicity (see section 5.3). The use of amisulpride is not recommended during pregnancy and in women of childbearing potential not using effective contraception, unless the benefits justify the potential risks.
Neonates exposed to antipsychotics including Amisulpride tablets during the third trimester of pregnancy are at risk of adverse reactions including extrapyramidal and/or withdrawal symptoms that may vary in severity and duration following delivery (see section 4.8). There have been reports of agitation, hypertonia, hypotonia, tremor, somnolence, respiratory distress, or feeding disorder. Consequently, newborns should be monitored carefully.
Amisulpride is excreted into breastmilk in rather large amounts above the accepted value of 10% of the maternal weight-adjusted dosage in some cases, but blood concentrations in breastfed infants have not been evaluated. There is insufficient information on the effects of amisulpride in newborns/infants. A decision must be made whether to discontinue breast-feeding or to abstain from amisulpride therapy taking into account the benefit of breastfeeding for the child and the benefit of therapy for the woman.
A decrease in fertility linked to the pharmacological effects of the drug (prolactin-mediated effect) was observed in treated animals.
Even used as recommended, amisulpride may cause somnolence and blurred vision so that the ability to drive vehicles or operate machinery can be impaired (see Section 4.8).
Adverse effects have been ranked under headings of frequency using the following convention: very common (≥1/10); common (≥1/100; <1/10); uncommon (≥1/1,000; <1/100); rare (≥1/10,000; <1/1,000); very rare (<1/10,000); not known (cannot be estimated from the available data).
Clinical trials data
The following adverse effects have been observed in controlled clinical trials. It should be noted that in some instances it can be difficult to differentiate adverse events from symptoms of the underlying disease.
Nervous system disorders
Extrapyramidal symptoms may occur: tremor, rigidity, hypokinesia, hypersalivation, akathisia, dyskinesia. These symptoms are generally mild at optimal dosages and partially reversible without discontinuation of amisulpride upon administration of antiparkinsonian medication. The incidence of extrapyramidal symptoms which is dose related, remains very low in the treatment of patients with predominantly negative symptoms with doses of 50-300mg/day.
Somnolence, acute dystonia (spasm torticolis, oculogyric crisis, trismus) may appear. This is reversible without discontinuation of amisulpride upon treatment with an antiparkinsonian agent.
Seizures, tardive dyskinesia characterised by rhythmic, involuntary movements primarily of the tongue and/or face have been reported, usually after long term administration.
Antiparkinsonian medication is ineffective or may induce aggravation of the symptoms.
Neuroleptic Malignant Syndrome (see section 4.4), which is a potentially fatal complication
Restless legs syndrome
Common: blurred vision (see section 4.7)
Common: Insomnia, anxiety, agitation, orgasmic dysfunction
Common: Constipation, nausea, vomiting, dry mouth.
Common: Amisulpride causes an increase in plasma prolactin levels which is reversible after drug discontinuation. This may result in galactorrhoea, amenorrhoea, gynaecomastia, breast pain, and erectile dysfunction.
Rare: benign pituitary tumour such as prolactinoma (see section 4.3 and 4.4)
Metabolism and nutrition disorders
Uncommon: Hyperglycemia (see section 4.4), hypertriglyceridemia and hypercholesterolaemia
Rare: hyponatraemia, syndrome of inappropriate antidiuretic hormone secretion (SIADH)
Common: Weight gain
Uncommon: Elevation of hepatic enzymes, mainly transaminases
Immune system disorders
Uncommon: Allergic reaction
Blood and Lymphatic system disorders:
Uncommon: Leukopenia, neutropenia (see section 4.4)
Rare: agranulocytosis (see section 4.4)
Rare: QT interval prolongation, ventricular arrhythmias such as torsade de pointes, ventricular tachycardia, ventricular fibrillation, cardiac arrest, sudden death (see section 4.4).
Uncommon: Increase in blood pressure
Rare: Venous thromboembolism, including pulmonary embolism sometimes fatal, and deep vein thrombosis (see section 4.4)
Respiratory, thoracic and mediastinal disorders:
Uncommon: nasal congestion, pneumonia aspiration (mainly in association with other antipsychotics and CNS depressants).
Skin and subcutaneous tissue disorders
Rare: Angioedema, urticaria
Not known: photosensitivity reaction
Musculoskeletal and connective tissue disorders:
Uncommon: osteopenia, osteoporosis
Renal and urinary disorders:
Uncommon: urinary retention
Pregnancy, puerperium and perinatal conditions
Not known: Drug withdrawal syndrome neonatal (see section 4.6)
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 of the medicinal product. Healthcare professionals are asked to report any suspected adverse reactions via the Yellow Card Scheme at: www.mhra.gov.uk/yellowcard or search for MHRA Yellow Card in the Google Play or Apple App Store.
Experience with amisulpride in overdosage is limited. Exaggeration of the known pharmacological effects of the drug have been reported. These include drowsiness and sedation, coma, hypotension and extrapyramidal symptoms.
Fatal outcomes have been reported mainly in combination with other psychotropic agents.
In cases of acute overdosage, the possibility of multiple drug intake should be considered.
Since amisulpride is weakly dialysed, hemodialysis should not be used to eliminate the drug.
There is no specific antidote to amisulpride. Appropriate supportive measures should therefore be instituted with close supervision of vital functions including continuous cardiac monitoring due to risk of prolongation of the QT interval until the patient recovers.
If severe extrapyramidal symptoms occur, anticholinergic agents should be administered.
Pharmacotherapeutic group: Antipsychotics
ATC Code: NO5A LO5
Mechanism of action
Amisulpride binds selectively with a high affinity to human dopaminergic D2/D3 receptor subtypes whereas it is devoid of affinity for D1, D4 and D5 receptor subtypes.
Unlike classical and atypical neuroleptics, amisulpride has no affinity for serotonic, α-adrenergic, histamine H1 and cholinergic receptors. In addition, amisulpride does not bind to sigma sites.
In animal studies, at high doses, amisulpride blocks dopamine receptors located in the limbic structure in preference to those in the striatum.
At low doses it preferentially blocks pre-synaptic D2/D3 receptors, producing dopamine release responsible for its disinhibitory effects.
This pharmacological profile explains the clinical efficacy of amisulpride against both negative and positive symptoms of schizopheria.
In man, amisulpride shows two absorption peaks: one which is attained rapidly, one hour post-dose and a second between 3 and 4 hours after administration. Corresponding plasma concentrations are 39 ± 3 and 54 ± 4 ng/ml after a 50mg dose.
A carbohydrate rich meal (containing 68% fluids) significantly decreases the AUCs, Tmax and Cmax of amisulpride but no changes were seen after a high fat meal. However, the significance of these findings in routine clinical use is not known.
The volume of distribution is 5.8 l/kg, plasma protein binding is low (16%) and no drug interactions are suspected.
Absolute bioavailability is 48%. Amisulpride is weakly metabolised: two inactive metabolites, accounting for approximately 4% of the dose, have been identified. There is no accumulation of amisulpride and its pharmacokinetics remain unchanged after the administration of repeated doses.
The elimination half-life of amisulpride is approximately 12 hours after an oral dose.
Amisulpride is eliminated unchanged in the urine. Fifty percent of an intravenous dose is excreted via the urine, of which 90% is eliminated in the first 24 hours. Renal clearance is in the order of 20 l/h or 330 ml/min.
Pharmacokinetics in special patient groups
Hepatic insufficiency: since the drug is weakly metabolised a dosage reduction should not be necessary in patients with hepatic insufficiency.
Renal insufficiency: The elimination half-life is unchanged in patients with renal insufficiency while systemic clearance is reduced by a factor of 2.5 to 3. The AUC of amisulpride in mild renal failure increased two fold and almost tenfold in moderate renal failure (see chapter 4.2). Experience is however limited and there is no data with doses greater than 50 mg.
Amisulpride is very weakly dialysed.
Elderly: Limited pharmacokinetic data in elderly subjects (> 65 years) show that a 10-30 % rise occurs in Cmax, T1/2 and AUC after a single oral dose of 50 mg. No data are available after repeat dosing.
An overall review of the completed safety studies indicates that amisulpride is devoid of any general, organ-specific, teratogenic, mutagenic or carcinogenic risk. Changes observed in rats and dogs at doses below the maximum tolerated dose are either pharmacological effects or are devoid of major toxicological significance under these conditions. Compared with the maximum recommended dosages in man, maximum tolerated doses are 2 and 7 times greater in the rat (200 mg/kg/d) and dog (120 mg/kg/d) respectively in terms of AUC. No carcinogenic risk, relevant to man, was identified in the rat at up to 1.5 to 4.5 times the expected human AUC.
A mouse carcinogenicity study (120 mg/kg/d) and reproductive studies (160, 300 and 500 mg/kg/d respectively in rat, rabbit and mouse) were performed. The exposure of the animals to amisulpride during these latter studies was not evaluated.
In animal trials, amisulpride elicited an effect on foetal growth and development at doses corresponding to Human Equivalent Dose of 2000 mg/day and upwards for a 50-kg patient. There was no evidence for a teratogenic potential of amisulpride. Studies on the impact of amisulpride on the behavior of the offspring have not been conducted.
Each tablet contains the following excipients:
Colloidal silica anhydrous
Do not store above 25°C. Store in original package.
The tablets are packed in blisters constituted from a PVC and aluminium foil.
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