Xismox  60 XL Prolonged Release Tablets


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Xismox 60 XL Prolonged Release Tablets


1. Name Of The Medicinal Product

ISIB 60 XL Prolonged Release Tablets


CIBRAL 60 XL Prolonged Release Tablets


XISMOX 60 XL Prolonged Release Tablets

2. Qualitative And Quantitative Composition

Isosorbide mononitrate 60.0 mg

For excipients, see section 6.1.

3. Pharmaceutical Form

Prolonged Release Tablets

Light yellow, biconvex, oval-shaped, prolonged release tablets, scored on both sides and marked "DX 31" on one side.

4. Clinical Particulars 4.1 Therapeutic Indications

Prophylaxis of angina pectoris

4.2 Posology And Method Of Administration

Adults: The recommended dose is one 60 mg tablet once daily to be taken in the morning. The dose may be increased to 120 mg (two tablets) daily, both to be taken once daily in the morning. The dose can be titrated, by initiating treatment with 30 mg (half tablet) for the first 2-4 days to minimize the possibility of headache.

Children: The safety and efficacy in children has not been established.

Elderly: No evidence of a need for routine dosage adjustment in the elderly has been found, but special care may be needed in those with increased susceptibility to hypotension or marked hepatic or renal insufficiency.

There is a risk of tolerance developing when nitrate therapy is given. For this reason it is important that the tablets are taken once a day to achieve an interval with low nitrate concentration, thereby reducing the risk of tolerance development.

When necessary the product may be used in combination with beta-adrenoreceptor blockers and calcium antagonists. Dose adjustments of either class of agent may be necessary.

The tablets must not be chewed or crushed. They should be swallowed with half a glass of water.

4.3 Contraindications

Hypersensitivity to isosorbide mononitrate, or to any of the excipients.

Sildenafil has been shown to potentiate the hypotensive effects of nitrates, and its co-administration with nitrates or nitric oxide donors is therefore contra-indicated.

Isosorbide mononitrate is contraindicated in constrictive pericarditis and pericardial tamponade.

4.4 Special Warnings And Precautions For Use

Use with extreme caution in hypotension with or without other signs of shock and in cases of cerebrovascular insufficiency.

Other special warnings and precautions with Isosorbide mononitrate:

Significant aortic or mitral valve stenosis.

Hypertrophic obstructive cardiomyopathy.

Anaemia. Hypoxaemia, Hypothyroidism.

The tablets are not indicated for relief of acute angina attacks.

Patients with rare hereditary problems of fructose or galactose intolerance, the Lapp lactase deficiency, sucrase-isomaltase insufficiency or glucose-galactose malabsorption should not take this medicine.

4.5 Interaction With Other Medicinal Products And Other Forms Of Interaction

Isosorbide mononitrate may act as a physiological antagonist to noradrenaline, acetylcholine, histamine and many other agents. The effect of anti-hypertensive drugs may be enhanced. Alcohol may enhance the hypotensive effects of isosorbide mononitrate.

The hypotensive effects of nitrates are potentiated by concurrent administration of sildenafil.

4.6 Pregnancy And Lactation

The tablets should not be used during pregnancy and lactation.

4.7 Effects On Ability To Drive And Use Machines

Patients experiencing headache or dizziness following initial treatment with the tablets should become stabilised on treatment before driving or using machines.

4.8 Undesirable Effects

Most of the adverse reactions are pharmacodynamically mediated and dose dependent. Headache may occur when treatment is initiated but usually disappears after continued treatment. Hypotension with symptoms such as dizziness and nausea has occasionally been reported. These symptoms generally disappear during long-term treatment. Less common are vomiting and diarrhoea. Uncommon is fainting.

Skin rashes (dry rash, exfoliative dermatitis) and pruritus have been reported rarely with isosorbide mononitrate. Myalgia has been reported very rarely.

4.9 Overdose

Symptoms: Pulsing headache. More serious symptoms are excitation, flushing, cold perspiration, nausea, vomiting, vertigo, syncope, tachycardia and a fall in blood pressure. Very large doses may give rise to methaemoglobinaemia (Very rare).

Treatment: Induction of emesis, activated charcoal. In case of pronounced hypotension the patient should first be placed in the supine position with legs raised. If necessary, fluid should be administered intravenously. (In cases of cyanosis as a result of methaemoglobinaemia, methyl thionine (methylene blue) 1 -2mg/Kg, slow intravenous delivery). Expert advice should be sought.

5. Pharmacological Properties 5.1 Pharmacodynamic Properties

Pharmacotherapeutic group: Organic nitrates, ATC code: C01D A14.

Isosorbide mononitrate is an organic nitrate, the major active metabolite of isosorbide dinitrate and an active vasodilator in its own right. The mechanism of action of Isosorbide mononitrate, like other organic nitrates, is believed to involve peripheral vasodilation, both venous and arterial. Maximal venous dilatation is usually achieved with lower doses of the nitrate, while higher doses cause progressive dilatation of the arterial vasculature. Nitrates thus lead to pooling of blood in the veins and reduced left ventricular and diastolic pressure. As arterial vascular resistance is also decreased, arterial blood pressure is reduced. Isosorbide mononitrate is an effective antianginal agent because it improves exertional angina by reducing myocardial oxygen demand, secondary to reduced preload and afterload. Organic nitrates release nitric oxide (NO), which induces protein phosphorylations, finally resulting in vascular smooth muscle relaxation.

In comparison to an immediate release product taken on a multiple dose basis, this prolonged release product has the advantage of both lowering the incidence of tolerance and increasing patient compliance.

5.2 Pharmacokinetic Properties

Isosorbide mononitrate is completely absorbed after oral administration. The absorption is not affected by simultaneous food intake. Contrary to many other nitrates, Isosorbide mononitrate is not subject to first pass metabolism and its oral bioavailability is therefore close to 100%. This feature probably contributes to the relatively small intersubject variability in plasma levels that are achieved following ingestion of the drug. Peak plasma concentrations of Isosorbide mononitrate after oral ingestion of a prolonged release tablet usually occur within 3.1-4.5 hours. Isosorbide mononitrate's volume of distribution is about 0.6 litres/kg, and its plasma protein binding is negligible (about 4%). Isosorbide mononitrate is metabolised to form several inactive compounds. Elimination is primarily by denitration and conjugation in the liver. The metabolites are excreted mainly via the kidneys. About 2% of the dose is excreted intact via the kidneys. The half-life of Isosorbide mononitrate in the plasma of healthy volunteers as well as in most patients is about 6.5 hours after administration of prolonged release tablets. Neither renal nor hepatic disease influence the pharmacokinetic of isosorbide mononitrate. The tablets are a prolonged release formulation. The active substance is released independently of pH.

5.3 Preclinical Safety Data

Isosorbide mononitrate is a well-established drug for which there is adequate published safety data.

6. Pharmaceutical Particulars 6.1 List Of Excipients

Hypromellose 2208

Lactose monohydrate

Compressible Sugar (composed of Sucrose and Maltodextrin)

Magnesium stearate

Colloidal anhydrous silica

Iron oxide yellow.

6.2 Incompatibilities

Not applicable.

6.3 Shelf Life 5 years 6.4 Special Precautions For Storage

Do not store above 25°C.

6.5 Nature And Contents Of Container

Blister pack PVDC- or ACLAR-coated-PVC/Aluminium 28, 30 or 98 tablets.

Not all pack sizes may be marketed.

6.6 Special Precautions For Disposal And Other Handling

No special requirements.

7. Marketing Authorisation Holder

Dexcel-Pharma Ltd.

1 Cottesbrooke Park

Heartlands Business Park, Daventry

Northamptonshire NN1 1 8YL, England

8. Marketing Authorisation Number(S)

PL 14017/0096

9. Date Of First Authorisation/Renewal Of The Authorisation 27th October 2004. 10. Date Of Revision Of The Text

29 October 2009

Xismox 60 XL Prolonged Release Tablets

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