Alimemazine Tartrate 7.5mg/5ml Syrup
Out of date information, search anotherSUMMARY OF PRODUCT CHARACTERISTICS
1 NAME OF THE MEDICINAL PRODUCT
Alimemazine Tartrate 7.5mg/5ml Syrup
2 QUALITATIVE AND QUANTITATIVE COMPOSITION
Alimemazine tartrate 7.5mg per 5ml For the full list of excipients see section 6.1.
3 PHARMACEUTICAL FORM
Syrup
4 CLINICAL PARTICULARS
4.1 Therapeutic indications
Vallergan has a central sedative effect comparable to that of chlorpromazine but largely devoid of the latter’s anti adrenaline action. It has powerful antihistamine and anti-emetic actions. In the management of urticaria and pruritus.
In pre-medication as a sedative before anaesthesia in children aged between 2 to 7 years.
4.2 Posology and method of administration
For oral administration.
Not recommended for infants less than 2 years old
DO NOT exceed the recommended dose (see also section 4.9)
Urticaria and pruritus
Adults: 10mg (approx. 6.5ml) two or three times daily; up to 100mg per day have been used in intractable cases.
Older people: dosage should be reduced to 10 mg (approx. 6.5ml) once or twice daily.
Children over 2 years of age: 2.5-5 mg (approx. 1.7 - 3.3ml) three or four times daily
As a sedative before anaesthesia
Children aged 2-7 years: the maximum dosage recommended is 2mg (approx. 1.3ml) per kg bodyweight 1-2 hours before the operation.
4.3 Contraindications
Alimemazine should be avoided in patients with hepatic or renal dysfunction, epilepsy, Parkinson’s disease, hypothyroidism, phaeochromocytoma, myasthenia gravis, prostatic hypertrophy. It should be avoided in patients known to be hypersensitive to phenothiazines or to any of the excipients or with history of narrow angle glaucoma.
Alimemazine is contraindicated for use in children less than 2 years of age (see section 4.4)
4.4 Special warnings and precautions for use
Precautions for use:
Alimemazine should be used with caution in:
• elderly or volume depleted patients who are more susceptible to orthostatic hypotension (see section 4.8)
• Elderly patients presenting chronic constipation (risk of paralytic ileus),
• Elderly patients with possible prostatic hypertrophy (see section 4.3);
• Elderly patients in hot and cold weather (risk of hyper/hypothermia) (see section 4.8)
• Patients with certain cardiovascular diseases: alimemazine may cause arrhythmias due to the tachycardia-inducing and hypotensive effects of phenothiazines (see section 4.8)
Paediatric population:
Alimemazine is contraindicated for use in children less than 2 years of age due to the risk of marked sedation and respiratory depression.
Patients are strongly advised not to consume alcoholic beverages or medicines containing alcohol throughout treatment (see section 4.5).
Exposure to sunlight should be avoided during treatment (see section 4.8).
The sugar content should be considered in patients with diabetes or on low-sugar diets.
This medicine contains sulphites that may cause or exacerbate anaphylactic reactions.
There is a risk of post-operative restlessness especially if the child is in pain.
4.5 Interaction with other medicinal products and other forms of interaction
The sedative effects of phenothiazines may be intensified (additively) by alcohol (see section 4.4), anxiolytics & hypnotics, opiates, barbiturates and other sedatives. There may be increased antimuscarinic and sedative effects of phenothiazines with tricyclic antidepressants & MAOI’s (including moclobemide). Respiratory depression may occur.
The hypotensive effect of most antihypertensive drugs especially alpha adrenoreceptor blocking agents may be exaggerated by phenothiazines.
The use of antimuscarinics will increase the risk of antimuscarinic side effects when used in conjunction with antihistamines.
The mild anticholinergic effect of phenothiazines may be enhanced by other anticholinergic drugs possibly leading to constipation, heat stroke, etc
The action of some drugs may be opposed by phenothiazines; these include amfetamine, levodopa, clonidine, guanethidine, adrenaline.
Anticholinergic agents may reduce the antipsychotic effect of phenothiazines.
Some drugs interfere with absorption of phenothiazines: antacids, anti-Parkinson, lithium. Increases or decreases in the plasma concentrations of a number of drugs, eg propranolol, phenobarbital have been observed but were not of clinical significance.
High doses of phenothiazines reduce the response to hypoglycaemic agents, the dosage of which may have to be raised. Adrenaline must not be used in patients overdosed with phenothiazines.
4.6 Fertility, pregnancy and lactation
Pregnancy
There is inadequate evidence of the safety of alimemazine in human pregnancy, but it has been widely used for many years without apparent ill
consequence. Some phenothiazines have shown evidence of harmful effects in animals. Alimemazine, like other drugs, should be avoided in pregnancy unless the physician considers it essential. Neuroleptics may occasionally prolong labour and at such a time should be withheld until the cervix is dilated 3-4cm. Possible adverse effects on the neonate include lethargy or paradoxical hyperexcitability, tremor and low Apgar score.
Breast-feeding
Phenothiazines may be excreted in milk: breast feeding should be suspended during treatment.
4.7 Effects on ability to drive and use machines
Patients should be warned about drowsiness during the early days of treatment, and advised not to drive or operate machinery.
4.8 Undesirable effects
Minor side-effects are nasal stuffiness, dry mouth, insomnia, agitation. Convulsions have been reported in some patients.
Liver function: Jaundice, usually transient, occurs in a very small percentage of patients. A premonitory sign may be a sudden onset of fever after one to three weeks of treatment followed by the development of jaundice.
Neuroleptic jaundice has the biochemical and other characteristics of obstructive jaundice and is associated with obstructions of the canaliculi by bile thrombi; the frequent presence of an accompanying eosinophilia indicates the allergic nature of this phenomenon. Treatment should be withheld on the development of jaundice.
Cardiorespiratory: hypotension, or pallor may occur in children.Elderly or volume depleted subjects are particularly susceptible to postural hypotension (see section 4.4).
Cardiac arrhythmias, including atrial arrhythmia. A-V block, ventricular tachycardia and fibrillation have been reported during therapy, possibly related to dosage. Pre-existing cardiac disease, old age, hypokalaemia and concurrent tricyclic antidepressants may predispose. ECG changes, usually benign, include widened QT interval, ST depression, U-waves and T-wave changes.
Respiratory depression is possible in susceptible patients.
Blood picture: A mild leukopaenia occurs in up to 30% of patients on prolonged high dosage. Agranulocytosis may occur rarely; it is not dose related. The occurrence of unexplained infections or fever requires immediate haematological investigation.
Extrapyramidal: Acute dystonias or dyskinesias, usually transitory are commoner in children and young adults and usually occur within the first 4 days of treatment or after dosage increases.
• akathisia characteristically occurs after large doses.
• Parkinsonism is commoner in adults and the elderly. It usually develops after weeks or months of treatment. One or more of the following may be seen: tremor, rigidity, akinesia or other features of Parkinsonism. Commonly just tremor.
• tardive dyskinesia: If this occurs it is usually, but not necessarily, after prolonged or high dosage. It can even occur after treatment has been stopped. Dosage should therefore be kept low whenever possible.
Skin and eyes: contact skin sensitisation is a serious but rare complication in those frequently handling preparations of phenothiazines: Care must be taken to avoid contact of the drug with the skin. Skin rashes of various kinds may also be seen in patients treated with the drug. Patients on high dosage may develop photosensitivity in sunny weather and should avoid exposure to direct sunlight (see section 4.4). Ocular changes and the development of a metallic greyish-mauve colouration of exposed skin have been noted in some individuals, mainly females, who have received chlorpromazine continuously for long periods (four to eight years).
Endocrine: hyperprolactinaemia which may result in galactorrhoea, gynaecomastia, amenorrhoea: impotence.
Neuroleptic malignant syndrome (hyperthermia, rigidity, autonomic dysfunction and altered consciousness) may occur.
Paradoxical excitement has been noted.
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 Yellow Card Scheme at: www.mhra.gov.uk/yellowcard.
4.9. Overdose
Symptoms of phenothiazine overdosage include drowsiness or loss of consciousness, hypotension, tachycardia, ECG changes, ventricular arrhythmias and hypothermia. Severe extra-pyramidal dyskinesias may occur.
If the patient is seen sufficiently soon (up to 6 hours) after ingestion of a toxic dose, gastric lavage may be attempted. Pharmacological induction of emesis is unlikely to be of any use. Activated charcoal should be given. There is no specific antidote. Treatment is supportive.
Generalised vasodilatation may result in circulatory collapse; Raising the patient's legs may suffice, in severe cases, volume expansion by intravenous fluids may be needed; infusion fluids should be warmed before administration in order not to aggravate hypothermia.
Positive inotropic agents such as dopamine may be tried if fluid replacement is insufficient to correct the circulatory collapse. Peripheral vasoconstrictor agents are not generally recommended; avoid the use of adrenaline.
Ventricular or supraventricular tachy-arrhythmias usually respond to restoration of normal body temperature and correction of circulatory or metabolic disturbances. If persistent or life-threatening, appropriate antiarrhythmic therapy may be considered. Avoid lidocaine and, as far as possible, long acting anti-arrhythmic drugs.
Pronounced central nervous system depression requires airway maintenance or, in extreme circumstances, assisted respiration. Severe dystonic reactions, usually respond to procyclidine (5-10mg) or orphenadrine (20-40mg) administered intramuscularly or intravenously. Convulsions should be treated with intravenous diazepam.
Neuroleptic malignant syndrome (NMS) has been reported in the context of alimemazine overdose. Symptoms of NMS include a combination of hyperthermia, muscle rigidity, altered mental status and autonomic instability. Since this syndrome is potentially fatal, alimemazine must be discontinued immediately, and intensive clinical monitoring and symptomatic treatment must be initiated.
Strict adherence to the recommended dose is critical (see also section 4.2).
Neuroleptic malignant syndrome should be treated with cooling. Dantrolene sodium may be tried.
5 PHARMACOLOGICAL PROPERTIES
5.1 Pharmacodynamic properties
Alimemazine has a central sedative effect, comparable to that of chlorpromazine, but largely devoid of the latter’s anti-adrenaline action. It has powerful antihistamine and anti-emetic actions.
5.2 Pharmacokinetic properties
There is little information about blood levels, distribution and excretion in humans. The rate of metabolism and excretion of phenothiazines decreases in old age.
5.3 Preclinical safety data
There are no pre-clinical data of relevance to the prescriber which are additional to that already included in other sections of the SPC.
6 PHARMACEUTICAL PARTICULARS
6.1 List of excipients
Sucrose
Apricot Flavour no.1 NS HSE Ethanol 96% v/v Caramel HT HSE Citric acid anhydrous Sodium citrate gran.
Sodium Benzoate Sodium sulphite anhydrous Sodium metabisulphite powder L(+) Ascorbic acid Demineralised water
6.2 Incompatibilities
None stated
6.3 Shelf life
36 months unopened 1 month after first opening Dilute product shelf life 28 days
6.4 Special precautions for storage
Protect from light. Store below 25°C.
6.5 Nature and contents of container
Glass bottle 100ml
Rolled on pilfer proof aluminium cap and a PVDC emulsion coated wad 125ml or HDPE/polypropylene child resistant cap with a tamper evident band 1000ml.
6.6 Special precautions for disposal
Not applicable
7 MARKETING AUTHORISATION HOLDER
Winthrop Pharmaceuticals UK Limited
One Onslow Street
Guildford
Surrey
GU1 4YS
United Kingdom
Trading as: Winthrop Pharmaceuticals, PO Box 611, Guildford, Surrey, GU1 4YS
8 MARKETING AUTHORISATION NUMBER(S)
PL 17780/0465
DATE OF FIRST AUTHORISATION/RENEWAL OF THE AUTHORISATION
01/07/1998 / 23/09/2007
10
DATE OF REVISION OF THE TEXT
23/04/2015