1. Name Of The Medicinal Product
Nivaquine Syrup
2. Qualitative And Quantitative Composition
Chloroquine Sulphate BP 68 mg/5 ml.
3. Pharmaceutical Form
Syrup.
4. Clinical Particulars
4.1 Therapeutic Indications
Nivaquine is a 4-aminoquinoline compound which has a high degree of activity against the asexual erythrocytic forms of all species of malaria parasites.
It is indicated for the prevention of malaria.
Route of administration: oral.
4.2 Posology And Method Of Administration
Prevention of malaria
Adults: 6 x 5 ml Nivaquine Syrup (300 mg chloroquine base) to be taken once a week on the same day each week.
Infants and children up to 12 years: 5 mg chloroquine base per kg bodyweight to be taken once a week on the same day each week.
It is advisable to start taking Nivaquine 1 week before entering an endemic area and to continue for 4 weeks after leaving.
4.3 Contraindications
The use of chloroquine is contraindicated in patients with known hypersensitivity to 4-aminoquinoline compounds.
Nivaquine is generally contraindicated in pregnancy. However, clinicians may decide to administer Nivaquine to pregnant women for the prevention or treatment of malaria. Ocular or inner ear damage may occur in infants born of mothers who receive high doses of chloroquine throughout pregnancy.
4.4 Special Warnings And Precautions For Use
Nivaquine should be used with care in patients with a history of epilepsy as it has been reported to provoke seizures. Caution is advised in cases of porphyria (precipitated disease may be especially apparent in patients with a high alcohol intake), hepatic disease (particularly cirrhosis) or renal disease, severe gastrointestinal, neurological and blood disorders and in patients receiving anticoagulant therapy.
Nivaquine should be used with care in patients with psoriasis as the condition may be exacerbated.
Although Nivaquine may have a temporary effect on visual accommodation during short term treatment, irreversible retinal damage may occur with prolonged treatment (see sections 4.7 and 4.8, below). Therefore, patients should be advised to discontinue the medication and seek immediate medical advice if they notice any deterioration in their vision which persists for more than 48 hours. Ophthalmological examination should always be carried out before and regularly (3-6 monthly intervals) during prolonged treatment. Retinal damage is particularly likely to occur if treatment has been given for longer than one year, or if the total dosage has exceeded 1.6 g/kg bodyweight. These precautions also apply to patients receiving chloroquine continuously at weekly intervals as a prophylactic against malarial attack for more than three years.
Bone marrow depression, including aplastic anaemia occurs rarely. Full blood counts should therefore be carried out regularly during extended treatment. Caution is required if drugs known to induce blood disorders are used concurrently.
Resistance of Plasmodium falciparum to chloroquine is well documented. When used as malaria prophylaxis official guidelines and local information on prevalence of resistance to anti-malarial drugs should be taken into consideration.
4.5 Interaction With Other Medicinal Products And Other Forms Of Interaction
Concomitant administration of chloroquine with magnesium-containing antacids or kaolin may result in reduced absorption of chloroquine. Chloroquine should, therefore, be administered at least two hours apart from antacids or kaolin.
Concomitant use of cimetidine and chloroquine may result in an increased half-life and a decreased clearance of chloroquine.
Chloroquine and mefloquine can lower the convulsive threshold. Co-administration of chloroquine and mefloquine may increase the risk of convulsions. Also, the activity of antiepileptic drugs might be impaired if co-administered with chloroquine.
There have been isolated case reports of an increased plasma ciclosporin level when ciclosporin and chloroquine were co-administered.
Chloroquine may affect the antibody response to rabies vaccine (HDCV).
Caution is advised in patients receiving anticoagulant therapy.
Co-administration of chloroquine and other drugs that have arrhythmogenic potential (e.g. amiodarone) may increase the risk of cardiac arrhythmias.
Concomitant administration of chloroquine and digoxin may increase plasma concentrations of digoxin.
Concomitant use of chloroquine with neostigmine or pyridostigmine has the potential to increase the symptoms of myasthenia gravis and thus diminish the effects of neostigmine and pyridostigmine.
4.6 Pregnancy And Lactation
Nivaquine is generally contraindicated in pregnancy. However, clinicians may decide to administer Nivaquine to pregnant women for the prevention or treatment of malaria. Ocular or inner ear damage may occur in infants born of mothers who receive high doses of chloroquine throughout pregnancy.
Although chloroquine is excreted in breast milk, the amount is insufficient to confer any benefit on the infant. Separate chemoprophylaxis for the infant is required.
When used for rheumatoid disease breast feeding is not recommended.
4.7 Effects On Ability To Drive And Use Machines
Nivaquine has a temporary effect on visual accommodation and patients should be warned that they should not drive or operate machinery if they are affected.
4.8 Undesirable Effects
Cardiovascular
- cardiomyopathy has been reported during long term therapy at high doses,
- cardiac dysrhythmias at high doses can occur,
- hypotension.
Central Nervous System (See Section 4.4)
- seizures,
- convulsions have been reported rarely (these may result from cerebral malaria. Such patients should receive an injections of phenobarbital to prevent seizures, in a dose of 3.5mg/kg in addition to intravenous administration of Nivaquine),
- psychiatric disorders such as anxiety, confusion, hallucinations, delirium.
Eye disorders (See Sections 4.4 and 4.7)
- transient blurred vision and reversible corneal opacity,
- cases of retinopathy as well as cases of irreversible retinal damage have been reported during long term, high dose therapy.
- macular defects of colour vision, optic atrophy, scotomas, field defects, blindness and pigmented deposits, difficult in focusing, diplopia.
Gastro-intestinal
- gastrointestinal disturbances such as nausea, vomiting, diarrhoea, abdominal cramps.
General
- headache.
Haematological (See Section 4.4)
- bone marrow depression, including aplastic anaemia, agranulocytosis, thrombocytopenia, neutropenia occurs rarely.
Hepatic
- changes in liver function, including hepatitis and abnormal liver function tests, have been reported rarely.
Hypersensitivity
- allergic and anaphylactic reactions, urticaria and angiodema have occurred rarely.
Hearing disorders
- ototoxicity such as tinnitus, reduced hearing, nerve deafness.
Muscular
- neuropathy, myopathy.
Skin (See Section 4.4)
- skin eruptions, pruritis, depigmentation, loss of hair, exacerbation of psoriasis, photosensitivity, pigmentation of the nails and mucosae (long term use).
- Rare reports of erythema multiforme, Stevens-Johnson syndrome, toxic epidermal necrolysis, exfoliative dermatitis and similar desquamation-type events.
4.9 Overdose
Chloroquine is highly toxic in overdosage; children are particularly susceptible to toxic doses of chloroquine. The chief symptoms of overdose include circulatory collapse due to a potent cardiotoxic effect, respiratory arrest and coma. Symptoms may progress rapidly after initial headache, drowsiness, visual disturbances nausea and vomiting. Death may result from circulatory or respiratory failure or cardiac dysrhythmia.
Gastric lavage should be carried out urgently, first protecting the airways and instituting artificial ventilation where necessary. There is a risk of cardiac arrest following aspiration of gastric contents in more serious cases. Activated charcoal left in the stomach may reduce absorption of any remaining chloroquine from the gut. Circulatory status (with central venous pressure measurement), respiration, plasma electrolytes and blood gases should be monitored, with correction of hypokalaemia and acidosis if indicated. Cardiac arrhythmias should not be treated unless life threatening; drugs with quinidine-like effects should be avoided.
Early administration of the following has been shown to improve survival in cases of serious poisoning:
1) Adrenaline infusion (0.25 micrograms/kg/min initially, with increments of 0.25 micrograms/kg/min until adequate systolic blood pressure (more than 100 mm mercury) is restored; adrenaline reduces the effects of chloroquine on the heart through its inotropic and vasoconstrictor effects.
2) Diazepam infusion (2 mg/kg over 30 minutes as a loading dose, followed by 1-2 mg/kg/day for up to 2-4 days). Diazepam may minimise cardiotoxicity.
Acidification of the urine, haemodialysis, peritoneal dialysis or exchange transfusions have not been shown to be of value in treating chloroquine -poisoning. Chloroquine is excreted very slowly, therefore symptomatic cases merit observation for several days.
5. Pharmacological Properties
5.1 Pharmacodynamic Properties
Pharmacotherapeutic group: Antimalarials, Aminoquinolines
ATC code: P01B A01
Chloroquine is used for the prevention of malaria. It has rapid schizonticidal effect and appears to affect cell growth by interfering with DNA; its activity also seems to depend on preferential accumulation in the infected erythrocyte. Chloroquine kills the erythrocytic forms of malaria parasites at all stages of development.
5.2 Pharmacokinetic Properties
Chloroquine is readily absorbed from the gastro-intestinal tract and about 55% in the circulation is bound to plasma proteins. It accumulates in high concentrations in some tissues, such as kidneys, liver, lungs and spleen and is strongly bound in melanin containing cells such as those in the eyes and the skin; it is also bound to double stranded DNA, present in red blood cells containing schizonts. Chloroquine is eliminated very slowly from the body and it may persist in tissues for a long period. Up to 70% of a dose may be excreted unchanged in urine and up to 25% may be excreted also in the urine as the desethyl metabolite. The rate of urinary excretion of chloroquine is increased at low pH values.
5.3 Preclinical Safety Data
Non-clinical data reveal no special hazard for humans based on conventional studies of safety pharmacology, repeated dose toxicity, genotoxicity, carcinogenic potential, toxicity to reproduction.
6. Pharmaceutical Particulars
6.1 List Of Excipients
Sucrose,
Monosodium glutamate,
Saccharin sodium,
Propylene glycol,
Methyl parahydroxybenzoate,
Propyl parahydroxybenzoate,
Peppermint Oil,
Pineapple flavour,
Caramel,
Purified water
6.2 Incompatibilities
None known.
6.3 Shelf Life
3 years.
6.4 Special Precautions For Storage
Nivaquine should be stored below 25oC, protected from light.
6.5 Nature And Contents Of Container
Amber glass bottle containing 100 ml. Either with rolled on pilfer proof aluminium cap and PVDC emulsion coated wad, or HDPE/polypropylene child resistant cap with a tamper evident band.
6.6 Special Precautions For Disposal And Other Handling
None stated.
7. Marketing Authorisation Holder
Sanofi-aventis
One Onslow Street
Guildford
Surrey, GU1 4YS, UK
8. Marketing Authorisation Number(S)
PL 04425/0329
9. Date Of First Authorisation/Renewal Of The Authorisation
06 March 2003
10. Date Of Revision Of The Text
21 September 2010
Legal category
P