1. Name Of The Medicinal Product
Octasa 800 mg MR Tablets
2. Qualitative And Quantitative Composition
Each tablet contains 800 mg mesalazine.
For a full list of excipients, see section 6.1
Excipients: Contains lactose monohydrate
3. Pharmaceutical Form
Modified-Release Tablets
Red-brown, oblong, modified-release tablets.
4. Clinical Particulars
4.1 Therapeutic Indications
Ulcerative Colitis:
For the treatment of mild to moderate acute exacerbations. For the maintenance of remission.
Crohn's ileo-colitis:
For the maintenance of remission.
4.2 Posology And Method Of Administration
Route of administration: Oral.
Swallow whole with a glass of water. Do not chew, crush or break tablets before swallowing.
ADULTS
Mild acute disease: 2.4 g (three tablets) a day in divided doses, with concomitant corticosteroid therapy where clinically indicated.
Moderate acute disease: 2.4 g to 4.8 g (three to six tablets) a day in divided doses, with concomitant corticosteroid therapy where clinically indicated.
Maintenance therapy: 1.6 g to 2.4 g (two to three tablets) taken once daily or in divided doses.
The maximum adult dose should not exceed six tablets a day.
ELDERLY
The normal adult dosage may be used unless renal function is impaired (see section 4.4).
CHILDREN
There is only limited documentation for an effect in children (age 6-18 years).
Children 6 years of age and older
• Active disease: To be determined individually, starting with 30-50 mg/kg/day in divided doses. Maximum dose: 75 mg/kg/day in divided doses. The total dose should not exceed 4 g/day.
• Maintenance treatment: To be determined individually, starting with 15-30 mg/kg/day in divided doses. The total dose should not exceed 2 g/day.
It is generally recommended that half the adult dose may be given to children up to a body weight of 40 kg; and the normal adult dose to those above 40 kg.
4.3 Contraindications
Use in patients with a history of allergy to salicylates, or hypersensitivity to any ingredient.
Severe renal impairment (GFR less than 20 ml/min).
Severe hepatic impairment. Gastric or duodenal ulcer, haemorrhagic tendency.
4.4 Special Warnings And Precautions For Use
Patients on oral forms of mesalazine should have renal function monitored, with serum creatinine levels measured prior to the start of treatment, every three months for the first year, then six monthly for the next four years and annually thereafter.
Treatment with mesalazine should be discontinued if renal function deteriorates.
Renal disorder: Mesalazine is excreted rapidly by the kidney, mainly as its metabolite, N-acetyl-5-aminosalicylic acid. Octasa 800 mg MR Tablets are best avoided in patients with mild to moderate renal impairment but, if necessary, should be used with extreme caution.
If dehydration develops, normal electrolyte levels and fluid balance should be restored as soon as possible.
In case of lung function impairment, especially asthma, patients need to be very closely monitored.
In patients with a history of sensitivity to sulphasalazine, therapy should be initiated only under close medical supervision. Treatment must be stopped immediately if acute symptoms of intolerance occur such as cramps, abdominal pain, fever, severe headache, or rash.
Very rarely serious blood dyscrasia has been reported. Haematological investigations including a complete blood count should be performed prior to initiation and whilst on therapy according to the physician's judgement. Such tests are generally recommended within 14 days of initiation of therapy with 2-3 repeat tests each after another 4 weeks. If the results are normal, tests are recommended quarterly. In case additional signs of illness appear, further control tests are necessary. This procedure is to be followed especially if a patient develops signs and symptoms suggestive of blood dyscrasia during treatment, such as unexplained bleeding, haematoma, purpura, anaemia, persistent fever, or a sore throat. Treatment with Octasa 800 mg MR Tablets should be stopped immediately if there is a suspicion or evidence of blood dyscrasia and patients should seek immediate medical advice.
Use in the elderly should be cautious and subject to patients having normal renal function.
There is only limited documentation for an effect in children (age 6-18 years), see section 4.2.
With reference to the presence of lactose monohydrate in the formulation, patients with rare hereditary problems of galactose intolerance, the Lapp lactase deficiency or glucose-galactose malabsorption should not take this medicine.
4.5 Interaction With Other Medicinal Products And Other Forms Of Interaction
The concurrent use of known nephrotoxic agents, such as NSAIDs and azathioprine, may increase the risk of renal reactions (see Section 4.4).
Mesalazine decreases the absorption of digoxin.
Mesalazine can increase the immunosuppressive effects of azathioprine and 6-mercaptopurine. A blood count, especially the leukocyte and lymphocyte cell count should be monitored repeatedly, especially at initiation of such combination therapy.
The uricosuric activity of sulfinpyrazone, and the diuretic effect of furosemide can be reduced.
4.6 Pregnancy And Lactation
Pregnancy
Data on a limited number of exposed pregnancies indicate no adverse effect of mesalazine on pregnancy or on the health of the foetus/new born child. To date, no other relevant epidemiological data are available. In one single case, after long-term use of high dose mesalazine (2-4 g, orally) during pregnancy, renal failure in a neonate was reported.
Animal studies on oral mesalazine do not indicate direct or indirect harmful effects, with respect to pregnancy, embryonic/foetal development, parturition or postnatal development.
Mesalazine should only be used during pregnancy if the potential benefit outweighs the possible risk.
Lactation
N-acetyl-mesalazine and, to a lesser degree, mesalazine are excreted in breast milk. Only limited experience in women during lactation is available to date. Hypersensitivity reactions like diarrhoea cannot be excluded. Therefore, mesalazine should only be used during breast-feeding if the potential benefit outweighs the possible risk. If the suckling neonate develops diarrhoea, the breast-feeding should be discontinued.
4.7 Effects On Ability To Drive And Use Machines
Mesalazine has no, or negligible, influence on ability to drive and use machines.
4.8 Undesirable Effects
Side-effects which occur rarely (
Side effects which occur very rarely (<1/10,000; incidence/treatment years), are listed by system organ class:
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(1) The frequency of blood dyscrasia appears smaller than the number of reported changes in individual white blood count, because reporting health professionals may have labelled several cases of blood dyscrasia not in this category
(2) Mesalazine-induced nephrotoxicity should be suspected in patients developing renal dysfunction during treatment
4.9 Overdose
In principle, the signs and symptoms would be expected to be similar to those observed in cases of salicylate intoxication: mixed acidosis-alkalosis, hyperventilation, pulmonary oedema, dehydration as a result of sweating and vomiting, and hypoglycaemia.
Treatment
For mixed acidosis-alkalosis: restoration of the acid-base balance in line with the specific situation and replacement of electrolytes.
For dehydration due to sweating and vomiting: administration of fluids.
For hypoglycemia: glucose administration.
In addition gastric lavage and intravenous infusion of electrolytes to promote diuresis. There is no known antidote.
5. Pharmacological Properties
5.1 Pharmacodynamic Properties
Octasa 800mg MR Tablets contain mesalazine [ATC code: A07E C02], also known as 5-aminosalicylic acid, which has an anti-inflammatory effect through a mechanism that has not yet been fully clarified. Mesalazine has been shown to inhibit LTB4-stimulated migration of intestinal macrophages and thus may reduce intestinal inflammation by restricting migration of macrophages to inflamed areas. The production of proinflammatory leukotrienes (LTB4 and 5-HETE) in the macrophages of intestinal wall is then inhibited. Under trial conditions mesalazine has also inhibited cyclooxygenase and thus, the release of thromboxane B2 and prostaglandin E2, but the clinical meaning of this effect is still unclear. Mesalazine also inhibits formation of the platelet activating factor (PAF). Recently, in in vitro and animal studies, mesalazine has been shown to activate PPAR-γ receptors which counteract nuclear activation of intestinal inflammatory responses. Mesalazine is also an antioxidant; it has been shown to decrease formation of reactive oxygen products and to capture free radicals. Furthermore, mesalazine inhibits secretion of water and chloride and increases the reabsorption of sodium in the intestine in experimental colitis in test animals.
5.2 Pharmacokinetic Properties
Octasa 800 mg MR Tablets are coated with a Eudragit S-based film. This copolymer allows the active principle to be released when the intraluminal pH is greater than 7, that is within the terminal ileum and colon, which are the true sites of inflammation. Octasa 800 mg MR Tablets have been designed to be weakly absorbed in the digestive tract. Absorption by the oral route is approximately 26%. Consequently, 74% of the administered dose remains within the terminal ileum and colon, being available to exert a topical anti-inflammatory effect. Mesalazine is metabolised both by the liver and the intestinal mucosa into an inactive derivative, N-acetyl-5-aminosalicylic acid. Studies show that mesalazine has an elimination half-life between nine hours (single dose) and eleven hours (steady state). A high intersubject variability has been seen in clinical trials. The elimination of mesalazine is essentially urinary and faecal, in the form of mesalazine and its N-acetyl metabolite. Following repeated administration for seven days, the quantities of mesalazine absorbed and eliminated by the urinary route in unchanged form and as the N-acetyl metabolite were 21.2 % and 20.9%, respectively.
Octasa 800 mg MR Tablets contain, in a single tablet, an equivalent quantity of mesalazine to that theoretically available from the complete azoreduction of 2 g of sulphasalazine.
5.3 Preclinical Safety Data
Preclinical data with mesalazine reveal no special hazard for humans based on conventional studies of safety pharmacology, genotoxixity, carcinogenicity or toxicity to reproduction.
Renal toxicity (renal capillary necrosis and epithelial damage in the proximal convoluted tubule or the whole nephron) has been seen in repeat-dose toxicity studies with high oral doses of mesalazine.
6. Pharmaceutical Particulars
6.1 List Of Excipients
Lactose monohydrate
Sodium starch glycolate (Type A)
Magnesium stearate (vegetable origin)
Talc E553b
Povidone E1201
Methacrylic acid – methyl methacrylate copolymer (1:2)
Triethyl citrate
Iron oxides E172
Macrogol 6000.
6.2 Incompatibilities
Not applicable.
6.3 Shelf Life
3 years.
6.4 Special Precautions For Storage
Do not store above 25 °C. Store in the original package.
6.5 Nature And Contents Of Container
Octasa 800 mg MR Tablets are available in PVC/aluminium blisters, each containing ten tablets.
The blisters are packed in cartons containing either 60, 90 or 180 tablets.
6.6 Special Precautions For Disposal And Other Handling
Not applicable
7. Marketing Authorisation Holder
Tillotts Pharma UK Limited
960 Capability Green
Luton
Bedfordshire LU1 3PE,
United Kingdom
8. Marketing Authorisation Number(S)
PL 36633/0001
9. Date Of First Authorisation/Renewal Of The Authorisation
17.10.2007
10. Date Of Revision Of The Text
23 June 2011