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ADCO-AMOCLAV 375mg (Tablets); ADCO-AMOCLAV 625mg (Tablets)
ADCO-AMOCLAV 375mg (Tablets)
ADCO-AMOCLAV 625mg (Tablets)
SCHEDULING STATUS:
S4
PROPRIETARY NAME
(and dosage form):
ADCO-AMOCLAV 375mg (Tablets)
ADCO-AMOCLAV 625mg (Tablets)
COMPOSITION:
ADCO-Amoclav 375mg: Each tablet contains:
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Amoxicillin trihydrate equivalent to amoxicillin |
250mg |
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and Potassium clavulanate equivalent to clavulanic acid |
125mg |
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Butylhydroxytoluene
(as antioxidant) |
0,46% m/m |
ADCO-Amoclav 625mg: Each tablet contains:
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Amoxicillin Trihydrate equivalent to amoxicillin |
500mg |
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|
and Potassium clavulanate equivalent to clavulanic acid |
125mg |
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Butylhydroxytoluene
(as antioxidant) |
0,46% m/m |
PHARMACOLOGICAL CLASSIFICATION:
A 20.1.2 Penicillins
PHARMACOLOGICAL ACTION:
Mechanism of action:
ADCO-Amoclav is a combination of amoxicillin and potassium clavulanate. The amoxicillin component of the formulation exerts a bactericidal action against many strains of Gram positive and Gram-negative organisms. The clavulanic acid component has little or no antimicrobial action. It does, however, by inactivation of susceptible beta-lactamase protect amoxicillin from degradation by beta-lactamase enzymes produced by penicillin resistant strains of organisms.
Antibacterial Activity
Clavulanic acid is an irreversible inhibitor of beta-lactamases produced by Staphylococcus aureus, Escherichia coli, Klebsiella pneumoniae, Proteus mirabilis and Proteus vulgaris , H. influenzae, N. gonorrhoeae and B. fragilis (In-vitro activity does not necessarily imply in-vivo efficacy). Potassium clavulanate does not inactivate the chromosomally mediated (Sykes Type1 Cephalosporinase) beta-lactamases produced by Acinetobacter species, Citrobacter species, Enterobacter, indole positive Proteus, Providencia species and Serratia marcescens.
Pharmacokinetics:
The pharmacokinetics of amoxicillin and clavulanic acid are closely allied and neither are adversely affected by the presence of food in the stomach, and are stable in the presence of gastric acid. The oral bioavailability of amoxicillin and potassium clavulante is approximately 90% and 75% respectively.
Peak serum levels of both occur about 1-2hour after oral administration. Clavulanic acid has about the same plasma elimination half-life (1hour) as that of amoxicillin (1,3hours). ADCO-Amoclav is eliminated primarily unchanged through the renal route (glomerular filtration and tubular secretion). Approximately 50-78% of amoxicillin and 25-40% of clavulanic acid are excreted unchanged in urine within the first 6 hrs. after administration.
INDICATIONS:
ADCO-Amoclav is indicated for the treatment of infections caused by amoxicillin resistant organisms producing beta-lactamases sensitive to clavulanic acid:
Upper respiratory tract infections: otitis media, tonsillitis, sinusitis.
Lower respiratory tract infections: bronchitis (caused by amoxicillin resistant beta-lactamases producing E. coli, H. influenzae and Haemophilus parainfluenzae), pneumonia.
Urinary tract infections: cystitis, urethritis, pyelonephritis.
Skin and soft tissue infections.
ADCO-Amoclav formulations will also be effective in the treatment of infections caused by amoxicillin sensitive organisms at the appropriate amoxicillin dosage since in this situation the clavulanic acid component does not contribute to the therapeutic effect.
CONTRA-INDICATIONS:
Allergy to penicillins and cephalosporins. Safety in pregnancy has not been established. ADCO-Amoclav is contra-indicated in patients with a previous history of amoxicillin and potassium clavulanate associated jaundice/hepatic dysfunction. ADCO-Amoclav is also contraindicated in infectious mononucleosis. Patients with lymphatic leukemia and patients with hyperuricaemia having been treated with allopurinol may also be at an increased risk of developing skin rashes.
WARNINGS:
Transient hepatitis and cholestatic jaundice has been reported, hence, ADCO-Amoclav should be used with caution in patients with evidence of hepatic dysfunction.
Serious and occasionally fatal hypersensitivity (anaphylactic) reactions have been reported in patients on penicillin therapy. Although anaphylaxis is more frequent following parenteral therapy, it has occurred in patients on oral penicillins. These reactions are more likely to occur in individuals with a history of penicillin hypersensitivity and/or a history of sensitivity to multiple allergens. There have been reports of individuals with a history of penicillin hypersensitivity who have experienced severe reactions when treated with cephalosporins. Before initiating therapy with any penicillin, careful inquiry should be made concerning previous hypersensitivity reactions to penicillins, cephalosporins or other allergens. If an allergic reaction occurs, ADCO-Amoclav should be discontinued and the appropriate therapy instituted: adrenaline, corticosteroids and antihistamines.
DOSAGE AND DIRECTIONS FOR USE:
Tablets should be taken immediately before a meal.
General information:
For infections caused by amoxicillin sensitive organisms, the dosage is that approved for amoxicillin as the clavulanic acid component does not contribute to the therapeutic effect.
Adults (oral): 1 or 2 ADCO-Amoclav 375mg 8hourly or 1 ADCO-Amoclav 625mg Tablet 8hourly for more severe infections and infections of the respiratory tract.
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Dosage guide for amoxicillin susceptible organisms (Adults) |
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Upper respiratory tract infections |
Lower respiratory tract infections |
Urinary tract infections |
Skin and soft
tissue infections |
ADCO-Amoclav
375mg |
1-2 tablets
8hourly |
1-2 tablets
8hourly |
1-2 tablets
8hourly |
1-2 tablets
8hourly |
ADCO-Amoclav
625mg |
1 tablet
8hourly |
1 tablet
8hourly |
1 tablet
8hourly |
1 tablet
8hourly |
For amoxicillin resistant organisms the dosage of ADCO-Amoclav Tablets are as follows:
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Dosage guide for amoxicillin resistant organisms (Adults) |
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Upper respiratory tract infections
(Otitis media)
H.influenzae
H. parainfluenzae |
Lower respiratory tract infections
(Bronchitis)
H.influenzae
H. parainfluenzae |
Urinary tract infections
E. coli
Klebsiella
pneumonia |
Skin and soft tissue infections
Staphylococcus
aureus |
ADCO-Amoclav
375mg |
2 tablets
8hourly |
2 tablets
8hourly |
1-2 tablets
8hourly |
1-2 tablets
8hourly |
ADCO-Amoclav
625mg |
1 tablet
8hourly |
1 tablet
8hourly |
1 tablet
8hourly |
1 tablet
8hourly |
Since both ADCO-Amoclav 375mg and 625mg contain the same amount of clavulanic acid (125mg, as the potassium salt), two ADCO-Amoclav 375mg are not equivalent to one ADCO-Amoclav 625mg. Therefore two ADCO-Amoclav 375mg should not be substituted for one ADCO-Amoclav 625mg for treatment of more severe infections.
Dosage in renal failure:
Both amoxicillin and clavulanic acid are excreted by the kidneys and the serum half-life of each increases in patients with renal failure. Therefore, the dose may need to be reduced or the interval extended. The following schedule in the dosage is proposed:
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Renal impairment |
Creatinine clearance |
Dosage |
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Mild |
>30 mL/minute |
No change in dosage |
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Moderate |
10 to 30 mL/minute |
1 tablet every twelve hours. |
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Severe |
<10 mL/minute |
Half a tablet every twelvehours. |
Haemodialysis decreases serum concentrations of both amoxicillin and clavulanic acid and an additional dose should be administered at the end of dialysis.
SIDE-EFFECTS AND SPECIAL PRECAUTIONS:
Amoxicillin
Sensitivity reactions are more likely to occur in individuals who have previously demonstrated hypersensitivity to penicillins and in those with a history of allergy, asthma, hay fever or urticaria. The hypersensitivity reactions reported are erythematous maculopapular rashes, urticaria, fever and joint pains. Anaphylactic shock may occur.
Gastrointestinal
Nausea, heartburn, vomiting and diarrhoea.
Pseudomembranous colitis has been reported.
Liver
Hepatotoxicity, hepatitis, cholestatic jaundice may occur. A moderate rise in serum glutamic oxalacetic transaminase (SGOT) has been noted, but the significance of this finding is unknown.
Hemic and Lymphatic Systems
Anaemia, thrombocytopenia, thrombocytopenic purpura, eosinophilia, leukopenia and granulocytopenia have been reported during therapy with penicillins. These reactions are usually reversible on discontinuation of therapy and are believed to be hypersensitivity phenomena.
Central Nervous System
Reversible hyperactivity, agitation, anxiety, insomnia, confusion, behavioural changes, and/or dizziness have also been reported. Depression, seizures, or hallucinations.
Other
A sore mouth or tongue and a black hairy tongue have been reported.
Allergic reactions which may include exfoliative dermatitis, other skin rashes, interstitial nephritis and vasculitis, may occur. Erythema multiforme (including Stevens Johnson syndrome), toxic episodes of necrolysis.
Clavulanic acid:
Gastro-intestinal: Nausea and diarrhoea
Liver: Cholestatic jaundice and hepatitis
Precautions
Allergic reactions may occur, usually manifesting as pruritic skin rash, an erythematous skin reaction, urticaria, angiodema, anaphylaxis or eosinophilia –Coomb’s test may become positive. In this event, withdrawal of ADCO-Amoclav and the administration of antihistamine will suffice in most cases. Should a serious anaphylactic reaction occur, ADCO-Amoclav should be discontinued and the patient treated with the usual agents: adrenalin, corticosteroids and antihistamines.
Treatment with ADCO-Amoclav may give rise to a maculopapular rash during therapy or within a few days after completion. The incidence of maculopapular rash is especially high in patients suffering from infectious mononucleosis and hence should be avoided.
The use of this antibiotic may lead to the selection of resistant strains of organisms and sensitivity testing should, therefore, be carried out whenever possible, to demonstrate the appropriateness of therapy. Monilial overgrowth such as vaginitis and thrush have been reported.
Treatment with ADCO-Amoclav can cause gastrointestinal symptoms such as diarrhoea, nausea and vomiting which can be minimised by administering the medicine at the start of a meal. In addition, as these symptoms are especially related to the potassium clavulanate component, where these gastro-intestinal symptoms occur and a higher concentration of amoxicillin is required, consideration should be given to administering the additional amoxicillin separately.
Caution must be exercised in patients with syphilis as some patients may experience a Jarisch - Herxheimer reaction shortly after starting the treatment. Symptoms include fever, chills, headache and reactions at the site of the lesions. The reactions can be dangerous in cardiovascular syphilis or where there is a serious risk of increased local damage such as optic atrophy.
A moderate rise in aspartame transaminase/alanine transaminase has been observed in patients treated with this combination.
Impaired renal function
Renal function should be monitored in patients with moderate to severe renal impairment and ADCO-Amoclav dosage should be adjusted (See Dosage and Directions for use). High dose should be avoided in patients with impaired renal function/heart failure and in patients receiving potassium sparing diuretics.
Impaired hepatic function
ADCO-Amoclav should be used with caution in patients with underlying hepatic disease as hepatic and cholestatic jaundice have been reported with this combination. The condition is more predominant in adult and elderly patients.
Use in lactation
Amoxicillin is excreted in human milk but the excretion of clavulanic acid has not been studied conclusively therefore caution should be exercised when ADCO-Amoclav is administered to nursing mothers.
Interactions:
Concurrent use of ADCO-Amoclav with probenecid may result in increased and prolonged blood levels of amoxicillin but since the excretion of clavulanic acid is unchanged by probenecid, its blood level remains unaffected.
Interaction of ADCO-Amoclav with coumarin or indandione - derivative anticoagulants, heparin, non-steroidal anti-inflammatory drugs (NSAIDs) especially, aspirin, other platelet aggregation inhibitors or thrombolytic agents may be clinically significant. ADCO-Amoclav may decrease the efficacy of oestrogen-containing oral contraceptives.
The concurrent administration of allopurinol and ampicillin substantially increases the incidence of rashes in patients receiving both agents as compared to patients receiving ampicillin alone. It is not known whether this potentiation of ampicillin rashes is due to allopurinol or the hyperuriceamia present in these patients. There are no data on amoxicillin/clavulanate combination and allopurinol administered concurrently.
KNOWN SYMPTOMS OF OVERDOSAGE AND PARTICULARS OF ITS TREATMENT
Nausea, vomiting and diarrhoea may occur with overdosing. Treatment is symptomatic and supportive.
Amoxicillin and clavulanic acid may be removed from the circulation by haemodialysis.
IDENTIFICATION:
ADCO-Amoclav 375mg:
White to off-white oval shaped biconvex, film coated tablets imprinted with `R375' in black ink on one side.
ADCO-Amoclav 625mg:
White to off-white oval shaped biconvex, film coated tablets imprinted with `R625' in black ink on one side.
PRESENTATION:
ADCO-Amoclav 375mg
Aluminium strip pack containing 15 and 100 tablets in a carton.
ADCO-Amoclav 625mg
Aluminium strip pack containing 15 tablets in a carton.
STORAGE INSTRUCTIONS:
Store below 25°C, protected from light and moisture.
KEEP OUT OF REACH OF CHILDREN.
REGISTRATION NUMBERS:
ADCO-Amoclav 375mg: 33/20.1.2/0461
ADCO-Amoclav 625mg: 33/20.1.2/0462
NAME AND BUSINESS ADDRESS OF APPLICANT:
RANBAXY (SA) (PTY) LTD
3rd Floor
Outspan House
1006 Lenchen Avenue North
CENTURION
DATE OF PUBLICATION OF THIS PACKAGE INSERT:
August 2000.
Amended: 14.03.2001
New addition to this site: March 2002 |
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