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Metvix 160 mg/g cream

Last Updated on eMC 03-Aug-2015 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 contains 160 mg/g of methyl aminolevulinate (as hydrochloride) equivalent to 16.0% of methyl aminolevulinate (as hydrochloride).

Excipients with known effect:

Metvix 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.

Metvix is indicated in adults above 18 years of age.

4.2 Posology and method of administration

Posology

Adults (including older people)

AK, BCC and Bowen's disease using red light

For treatment of actinic keratoses (AK) one session of photodynamic therapy should be administered. Treated lesions should be evaluated after three months and if there has been an incomplete response, a second treatment may be given. 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, 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.

AK using daylight

The daylight treatment may be used to treat mild to moderate AK lesions. One treatment should be given. Treated lesions should be evaluated after three months and if there has been an incomplete response, a second treatment may be given.

Paediatric population

The safety and efficacy of Metvix in children below 18 years have not yet been established.

Method of administration

AK, BCC and Bowen's disease using red light

Apply a layer of Metvix (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.

AK using daylight

 

Metvix daylight treatment can be used if the temperature conditions are suitable to stay comfortably outdoors for 2 hours. If the weather is rainy, or is likely to become so, Metvix daylight treatment should not be used.

A sunscreen should be applied, please see section 4.4. Once sunscreen has dried, scales and crusts should be removed from the lesions and the skin surface roughened before applying a thin layer of Metvix to the treatment areas. No occlusion is necessary. Patients should go outside after Metvix application or, at the latest, 30 minutes later in order to avoid excessive protoporphyrin IX accumulation which would lead to greater pain on light exposure. In order to minimize pain and ensure maximum efficacy the patient should then stay outdoors for 2 continuous hours in full daylight and avoid going indoors. On sunny days, should the patient feel uncomfortable in direct sunlight, shelter in the shade may be taken. Following the 2 hour exposure period, Metvix should be washed off.

4.3 Contraindications

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

Morpheaform basal cell carcinoma.

Porphyria.

4.4 Special warnings and precautions for use

The usage of Metvix requires a specific knowledge in photodynamic therapy as it may necessitate the use of a red light lamp. Accordingly, it should be administered in the presence of a physician, a nurse or other health care professional trained in the use of photodynamic therapy.

When using Metvix with daylight, a sunscreen should be applied to all areas exposed to daylight, including the treatment areas, prior to lesion preparation. Sunscreen used should offer adequate protection (SPF30 or higher) and must not include physical filters (eg. titanium dioxide, zinc oxide, iron oxide) as these inhibit absorption of visible light which may impact efficacy. Only sunscreens with chemical filters should be used with daylight treatment.

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. 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 should be avoided.

4.5 Interaction with other medicinal products and other forms of interaction

No interaction studies have been performed

4.6 Fertility, pregnancy and lactation

Pregnancy

There are no or limited amount of data from the use of methyl aminolevulinate in pregnant women.

Animal studies are insufficient with respect to reproductive toxicity (see section 5.3).

Metvix is not recommended during pregnancy.

Breastfeeding

It is unknown whether methyl aminolevulinate/metabolites are excreted in human milk.

A risk to the newborns/infants cannot be excluded.

Breast-feeding should be discontinued for 48 hours after application of Metvix.

4.7 Effects on ability to drive and use machines

Not relevant.

4.8 Undesirable effects

Metvix with red light in AK, BCC and Bowen's disease

a) Summary of the safety profile: 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) Tabulated list of adverse reactions: the incidence of adverse reactions in a clinical trial population of 932 patients receiving the standard treatment regimen with red light and adverse reactions reported from the post marketing surveillance are shown in the table below.

The adverse reactions are classified by System Organ Class and frequency, using the following convention: very common (≥ 1/10), common (≥ 1/100 to < 1/10), uncommon (≥ 1/1,000 to < 1/100), rare (≥ 1/10,000 to <1/1,000), very rare (< 1/10,000), not known (cannot be estimated from the available data) (see Table 1).

Table 1: tabulated list of adverse reactions

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

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.

Metvix with daylight in AK

No new local adverse reactions were reported in the two phase III Metvix daylight studies compared to the already known local adverse reactions with Metvix red light. Metvix DL-PDT was almost painless compared to Metvix c-PDT (refer to section 5.1).

In the two Phase III studies, including a total of 231 patients, local related adverse events were reported less frequently on Metvix DL-PDT than on c-PDT treated sides (45.0% and 60.1% of subjects, respectively).

Reporting of suspected adverse reactions

Reporting suspected adverse reactions after authorisation of the medicinal product is important. It allows continued monitoring of the benefit/risk balance of the medicinal product. Healthcare professionals are asked to report any suspected adverse reactions via the national reporting system via Yellow Card Scheme at: www.mhra.gov.uk/yellowcard.

4.9 Overdose

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

5. Pharmacological properties
5.1 Pharmacodynamic properties

Pharmacotherapeutic group:

Antineoplastic agent, ATC Code: L01X D03

Mechanism of action:

• Metvix with red light in AK, BCC and Bowen's disease

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.

• Metvix with daylight in AK

After topical application of methyl aminolevulinate, porphyrins are produced intracellularly in the treated skin lesions. The intracellular porphyrins (including PpIX) are photoactive, fluorescing compounds and, upon daylight activation in the presence of oxygen, singlet oxygen is formed which causes damage to cellular compartments, in particular the mitochondria. When Metvix is used with daylight, PpIX is continuously being produced and activated within the target cells during the 2 hours of daylight exposure creating a constant micro-phototoxic effect. Daylight may not be sufficient for Metvix daylight treatment during winter months in certain parts of Europe. Metvix daylight photodynamic therapy is feasible all year long in southern Europe, from February to October in middle Europe, and from March to October in northern Europe.

Clinical efficacy

• Metvix with daylight in AK

The efficacy and safety of Metvix daylight photodynamic therapy (DL-PDT) was compared to Metvix conventional photodynamic therapy (c-PDT) in two randomised, investigator-blinded, comparative, intra-individual clinical studies conducted in Australia and Europe, including a total of 231 patients. Patients were treated on one side of the face or scalp with Metvix DL-PDT and on the contralateral side with Metvix c-PDT.

The results of both Phase III studies demonstrated that Metvix DL-PDT is similar (non-inferior) to Metvix c-PDT for treating AK lesions (on the percentage change from baseline in the number of treated lesions per side at 12 weeks after one treatment) and is significantly less painful.

In the Australian study, the percentage change from baseline in the number of mild treated lesions was 89.2% versus 92.8% for DL-PDT versus c-PDT respectively (95% CI of the mean treatment difference: [-6.8; -0.3], per protocol population). In the European study, the percentage change from baseline in the number of total (mild and moderate) treated lesions was 70.1% versus 73.6% for DL-PDT versus c-PDT respectively (95% CI of the mean treatment difference: [-9.5; 2.4], per protocol population).

Metvix DL-PDT was almost painless compared to Metvix c-PDT, with a pain score (on an 11-point scale ranging from 0 to 10) of 0.8 versus 5.7 (p<0.001) in the Australian study and 0.7 versus 4.4 (p<0.001) in the European study.

In both studies, regardless of whether the weather was sunny or cloudy, efficacy was demonstrated.

The maintenance of lesion response rate assessed in the Australian study was high with both treatments for patients presenting at week 24 (96% for DL-PDT and 96.6% for c-PDT).

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

Non-clinical data reveal no special hazard for humans based on conventional studies of safety pharmacology, repeated dose toxicity and genotoxicity. 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

Date of first authorisation:

Date of last renewal: 20th July 2006

10. Date of revision of the text

29th May 2015

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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