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Praxilene 100mg Capsules

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SUMMARY OF PRODUCT CHARACTERISTICS

1 NAME OF THE MEDICINAL PRODUCT

Praxilene 100mg Capsules

2 QUALITATIVE AND QUANTITATIVE COMPOSITION

100mg naftidrofuryl oxalate equivalent to 81.0 mg naftidrofuryl and 19.0 mg oxalate.

3    PHARMACEUTICAL FORM

Capsule.

4    CLINICAL PARTICULARS

4.1    Therapeutic indications

Peripheral vascular disorders - intermittent claudication, night cramps, rest pain, incipient gangrene, trophic ulcers, Raynaud’s Syndrome, diabetic arteriopathy and acrocyanosis.

4.2    Posology and method of administration

Posology:

One or two capsules three times daily for a minimum of three months, or at the discretion of the physician.

Method of administration:

For oral administration. The capsules should be swallowed whole during meals with a sufficient amount of water (minimum) of one glass.

Paediatric population

The safety and efficacy of Praxilene in the paediatric population have not been established. This drug is not indicated for use in children.

4.3 Contraindications

Hypersensitivity to the drug. Patients with a history of hyperoxaluria or recurrent calcium-containing stones.

4.4 Special warnings and precautions for use

The administration of Praxilene may modify the composition of the urine, promoting the formation of calcium oxalate kidney stones (the oxalate content is 19 mg per 100 mg of active ingredient).

A sufficient amount of liquid should be taken during treatment to maintain an adequate level of diuresis.

The administration of Praxilene without liquid before going to bed may cause local oesophagitis. Therefore, it is essential to always take the capsule with a sufficient amount of water.

4.5 Interaction with other medicinal products and other forms of interaction

None known.

4.6    Pregnancy and lactation

Pregnancy

In the absence of any relevant clinical data, the use of Praxilene is not advisable during pregnancy.

Lactation

In the absence of specific data concerning the excretion of the drug in human milk, Praxilene should not be used by breast-feeding women.

4.7    Effects on ability to drive and use machines

None known.

4.8 Undesirable effects

According to information collected during clinical trials and spontaneous reports since marketing authorisation, the following undesirable effects may occur under treatment with Praxilene.

The following definitions apply to the frequency terminology used hereafter:

very common >1/10

common >1/100, <1/10

uncommon >1/1,000, <1/100

rare >1/10,000, <1/1,000

very rare <1/10,000

frequency not known: cannot be estimated from the available data

Gastro-intestinal disorders:

Uncommon: Diarrhoea, nausea, vomiting and epigastric pain.

Frequency not known: In some patients who took the medicinal product without liquid before going to bed, the capsule being stuck in the throat led to local oesophagitis.

Renal and urinary disorders:

Very rare: Calcium oxalate kidney stones (see section 4.4).

Skin and subcutaneous tissue disorders:

Uncommon: Skin rash.

Hepatobiliary disorders:

Rare: Liver damage

4.9 Overdose

Signs and symptoms: Depression of cardiac conduction and convulsions may occur.

Treatment: The stomach should be emptied by gastric lavage and emesis. Activated charcoal may be employed if necessary. Cardiovascular function and respiration should be monitored and, in severe cases, electrical pacemaking or the use of isoprenaline should be considered. Convulsions may be managed by diazepam.

5    PHARMACOLOGICAL PROPERTIES

5.1    Pharmacodynamic properties

Naftidrofuryl oxalate has been shown to exert a direct effect on intracellular metabolism. Thus it has been shown in man and animals that it produces an increase of ATP levels and a decrease of lactic acid levels in ischaemic conditions, evidence for an enhancement of cellular oxidative capacity. Furthermore, naftidrofuryl oxalate is a powerful spasmolytic agent.

5.2 Pharmacokinetic properties

Naftidrofuryl oxalate is well absorbed when given orally. Peak plasma levels occur about 30 minutes after dosing and the half life is about an hour, although intersubject variation is relatively high. Accumulation does not occur at a dose level of 200mg three times daily.

The drug becomes extensively bound to plasma proteins and is excreted principally via the urine, all in the form of metabolites.

5.3 Preclinical safety data

No toxic effects were seen in animal studies which provide additional information to that obtained in man. In repeated dose studies the no effect level was 25mg/kg/day or greater. There was no evidence of effects on reproduction below doses which caused maternal toxicity.

6    PHARMACEUTICAL PARTICULARS

6.1    List of excipients

Talc

Magnesium Stearate Purified Water*

Denatured Ethanol*

Capsule Shells:

Erythrosine (E127)

Titanium Dioxide (E171)

Gelatine Printing ink:

Black iron oxide (E172)

*Not present in final product

6.2 Incompatibilities

None known.

6.3


Shelf life

36 months.

6.4    Special precautions for storage

Do not store above 25°C

Store in the original package in order to protect from light and moisture

6.5    Nature and contents of container

Pack size 10 (medical sample), 21 and 84 capsules:-

Cardboard carton containing blister strips comprising heat-sealable PVC

(250pm)/PVDC 120 g/m2 and aluminium foil (30pm).

Pack size 100 and 500:

Polyethylene securitainers with tamper evident closures.

6.6    Special precautions for disposal

None.

7    MARKETING AUTHORISATION HOLDER

Merck Serono Ltd Bedfont Cross Stanwell Road Feltham Middlesex TW14 8NX United Kingdom

8    MARKETING AUTHORISATION NUMBER(S)

PL 11648/0064

9    DATE OF FIRST AUTHORISATION/RENEWAL OF THE AUTHORISATION

24/03/2009

10 DATE OF REVISION OF THE TEXT

05/03/2015