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Metvix 160 mg/g cream

Last Updated on eMC 21-Jan-2013 View changes  | Galderma (U.K) Ltd Contact details

1. Name of the medicinal product

Metvix 160 mg/g cream.

2. Qualitative and quantitative composition

Metvix cream contains 160 mg/g of methyl aminolevulinate (as hydrochloride) equivalent to 16.0% of methyl aminolevulinate (as hydrochloride).

Excipients with known effects:

Metvix cream contains cetostearyl alcohol (40 mg/g), methyl parahydroxybenzoate (E 218; 2 mg/g), propyl parahydroxybenzoate (E 216; 1 mg/g) and arachis oil (30 mg/g).

For the full list of excipients, see section 6.1.

3. Pharmaceutical form

Cream.

The colour is cream to pale yellow.

4. Clinical particulars
4.1 Therapeutic indications

Treatment of thin or non-hyperkeratotic and non-pigmented actinic keratoses on the face and scalp when other therapies are considered less appropriate.

Only for treatment of superficial and/or nodular basal cell carcinoma unsuitable for other available therapies due to possible treatment related morbidity and poor cosmetic outcome; such as lesions on the mid-face or ears, lesions on severely sun damaged skin, large lesions, or recurrent lesions.

Treatment of squamous cell carcinoma in situ (Bowen´s disease) when surgical excision is considered less appropriate.

4.2 Posology and method of administration

Adults (including the elderly)

For treatment of actinic keratoses (AK) one session of photodynamic therapy should be administered. Treated lesions should be evaluated after three months and if needed, treatment should be repeated with a second therapy session. For treatment of basal cell carcinoma (BCC) and Bowen's disease two sessions should be administered with an interval of one week between sessions. Before applying Metvix cream, the lesion surface should be prepared to remove scales and crusts and roughen the surface of the lesions. Nodular BCC lesions are often covered by an intact epidermal keratin layer which should be removed. Exposed tumour material should be removed gently without any attempt to excise beyond the tumour margins.

Apply a layer of Metvix cream (about 1 mm thick) by using a spatula to the lesion and the surrounding 5-10 mm of normal skin. Cover the treated area with an occlusive dressing for 3 hours.

Remove the dressing, and clean the area with saline and immediately expose the lesion to red light with a continuous spectrum of 570-670 nm and a total light dose of 75 J/cm2 at the lesion surface. Red light with a narrower spectrum giving the same activation of accumulated porphyrins may be used. The light intensity at the lesion surface should not exceed 200 mW/cm2.

Only CE marked lamps should be used, equipped with necessary filters and/or reflecting mirrors to minimize exposure to heat, blue light and UV radiation. It is important to ensure that the correct light dose is administered. The light dose is determined by factors such as the size of the light field, the distance between lamp and skin surface and illumination time. These factors vary with lamp type, and the lamp should be used according to the user manual. The light dose delivered should be monitored if a suitable detector is available.

Patient and operator should adhere to safety instructions provided with the light source. During illumination patient and operator should wear protective goggles which correspond to the lamp light spectrum.

Healthy untreated skin surrounding the lesion does not need to be protected during illumination.

Multiple lesions may be treated during the same treatment session.

Lesion responses should be assessed after three months, and at this response evaluation, lesion sites showing non-complete response may be retreated if desired. It is recommended that the response of BCC and Bowen's disease lesions be confirmed by histological examination of biopsy material. Subsequently, close long term clinical monitoring of BCC and Bowen´s disease is recommended, with histology if necessary.

Children and adolescents:

There is no experience of treating patients below the age of 18 years.

4.3 Contraindications

Hypersensitivity to the active substance, to any of the excipients including arachis oil, listed in section 6.1; or to peanut or soya.

Morpheaform basal cell carcinoma.

Porphyria.

4.4 Special warnings and precautions for use

Metvix should only be administered in the presence of a physician, a nurse or other health care professionals trained in the use of photodynamic therapy with Metvix.

Metvix is not recommended during pregnancy (see section 4.6).

Thick (hyperkeratotic) actinic keratoses should not be treated with Metvix. There is no experience of treating lesions which are pigmented, highly infiltrating or located on the genitalia with Metvix cream. There is no experience of treating Bowen´s disease lesions larger than 40 mm. As with cryotherapy and 5-FU therapy of Bowen´s disease, response rates of large lesions (>20 mm in diameter) are lower than those of small lesions. There is no experience of treating Bowen´s disease in transplant patients on immunosuppressive therapy or in patients with a history of arsenic exposure.

Methyl aminolevulinate may cause sensitization by skin contact resulting in angioedema, application site eczema or allergic contact dermatitis. The excipient cetostearyl alcohol may cause local skin reactions (e.g. contact dermatitis), methyl- and propyl parahydroxybenzoate (E218, E216) may cause allergic reactions (possibly delayed).

Any UV-therapy should be discontinued before treatment. As a general precaution, sun exposure of the treated lesion sites and surrounding skin should be avoided for about 2 days following treatment.

Direct eye contact with Metvix cream should be avoided.

4.5 Interaction with other medicinal products and other forms of interaction

No specific interaction studies have been performed with methyl aminolevulinate.

4.6 Fertility, pregnancy and lactation

Pregnancy

There are no data from the use of Methyl aminolevulinate in pregnant women. Reproductive toxicity studies in animals have not been performed. Metvix is not recommended during pregnancy (see section 4.4).

Breast-feeding

The amount of methyl aminolevulinate excreted into human breast milk following topical administration of Metvix cream is not known. In the absence of clinical experience, breast-feeding should be discontinued for 48 hours after application of Metvix cream.

4.7 Effects on ability to drive and use machines

Not relevant.

4.8 Undesirable effects

a) Approximately 60 % of patients experience reactions localised to the treatment site that are attributable to toxic effects of the photodynamic therapy (phototoxicity) or to preparation of the lesion.

The most frequent symptoms are painful and burning skin sensation typically beginning during illumination or soon after and lasting for a few hours with resolving on the day of treatment. The symptoms are usually of mild or moderate severity and rarely require early termination of illumination. The most frequent signs of phototoxicity are erythema and scab. The majority are of mild or moderate severity and persist for 1 to 2 weeks or occasionally longer.

Local phototoxic reactions may be reduced in frequency and severity with repeated treatment of Metvix.

b) The incidence of adverse reactions in a clinical trial population of 932 patients receiving the standard treatment regimen and adverse reactions reported from the post marketing surveillance are shown in the table below.

Body system (MedDRA)

Frequency*

Adverse reaction

Nervous system disorders

Common

Paraesthesia, headache

Eye disorders

Uncommon

Not known

Eye swelling, eye pain

Eyelid oedema

Vascular disorders

Uncommon

Wound haemorrhage

Gastrointestinal disorders

Uncommon

Nausea

Skin and subcutaneous tissue disorders

Very common

Pain of skin, skin burning sensation, scab, erythema

Common

Skin infection, skin ulcer, skin oedema, skin swelling, blister, skin hemorrhage, pruritus, skin exfoliation, skin warm

Uncommon

Urticaria, rash, skin irritation, photosensitivity reaction, skin hypopigmentation, skin hyperpigmentation, heat rash, skin discomfort

Not known

Angioedema, face oedema (swelling face), application site eczema, allergic contact dermatitis, rash pustular (application site pustule)

General disorders and administration site conditions

Common

Application site discharge, feeling hot

Uncommon

Fatigue

* Very common adverse reactions: Adverse reactions occurring in ≥1/10) of patients.

Common adverse reactions: Adverse reactions occurring in ≥1/100, <1/10 of patients.

Uncommon adverse reactions: Adverse reactions occurring in ≥1/1000, ≤1/100 of patients.

Not known: Cannot be estimated from the available data

Adverse reactions reported by more than two patients in the clinical studies are included.

Adverse reactions with not known frequency are reported from the post marketing experience.

A study conducted in immunocompromised organ transplant recipients did not identify any safety concern in this population, adverse events being similar to those reported in trials in immunocompetent patients.

4.9 Overdose

The severity of local phototoxic reactions such as erythema, pain and burning sensation may increase in case of prolonged application time or very high light intensity.

5. Pharmacological properties
5.1 Pharmacodynamic properties

Pharmacotherapeutic group:

Antineoplastic agent, ATC Code: L01X D03

Mechanism of Action:

After topical application of methyl aminolevulinate, porphyrins accumulate intracellularly in the treated skin lesions. The intracellular porphyrins (including PpIX) are photoactive, fluorescing compounds and, upon light activation in the presence of oxygen, singlet oxygen is formed which causes damage to cellular compartments, in particular the mitochondria. Light activation of accumulated porphyrins leads to a photochemical reaction and thereby phototoxicity to the light-exposed target cells.

5.2 Pharmacokinetic properties

In vitro dermal absorption of radiolabelled methyl aminolevulinate applied to human skin has been studied. After 24 hours the mean cumulative absorption through human skin was 0.26 % of the administered dose. A skin depot containing 4.9 % of the dose was formed. No corresponding studies in human skin with damage similar to actinic keratosis lesions and additionally roughened surface or without stratum corneum were performed.

In humans, a higher degree of accumulation of porphyrins in lesions compared to normal skin has been demonstrated with Metvix cream. After application of the cream for 3 hours and subsequent illumination with non-coherent light of 570-670 nm wavelength and a total light dose of 75 J/cm2, complete photobleaching occurs with levels of porphyrins returning to pre-treatment values.

5.3 Preclinical safety data

Preclinical studies on general toxicity and genotoxicity studies in the presence or absence of photoactivation, do not indicate potential risks for man. Carcinogenicity studies or studies on the reproductive function have not been performed with methyl aminolevulinate.

6. Pharmaceutical particulars
6.1 List of excipients

Self-emulsifying glyceryl monostearate

cetostearyl alcohol

poloxyl 40 stearate

methyl parahydroxybenzoate (E 218)

propyl parahydroxybenzoate (E 216)

disodium edetate

glycerol

white soft paraffin

cholesterol

isopropyl myristate

arachis oil

refined almond oil

oleyl alcohol

purified water.

6.2 Incompatibilities

Not applicable.

6.3 Shelf life

Unopened: 15 months.

1 week after first opening of the container.

6.4 Special precautions for storage

Store in a refrigerator (2°C - 8°C).

6.5 Nature and contents of container

Aluminium tube with internal protective lacquer and a latex seal. Screw cap of HDPE.

Metvix cream is supplied in a tube containing 2 g cream.

6.6 Special precautions for disposal and other handling

No special requirements for disposal.

7. Marketing authorisation holder

Galderma (UK) Ltd

Meridien House

69-71 Clarendon Road

Watford

Herts

WD17 1DS

UK

8. Marketing authorisation number(s)

PL 10590/0048

9. Date of first authorisation/renewal of the authorisation

20/07/2006

10. Date of revision of the text

December 2012

Company contact details

Galderma (U.K) Ltd

Company image
Address

Meridien House, 69-71 Clarendon Road, Watford, Hertfordshire, WD17 1DS, UK

Fax

+44 (0)1923 208998

Telephone

+44 (0)1923 208950

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Active ingredients

methyl aminolevulinate hydrochloride

Legal categories

POM - Prescription Only Medicine

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