European Medicines Agency Evaluation of Medicines for Human Use Doc.Ref.: EMEA/460925/2008 ASSESSMENT REPORT FOR Vimpat International Nonproprietary Name: lacosamide Procedure No. EMEA/H/C/000863 Assessment Report as adopted by the CHMP with all information of a commercially confidential nature deleted. 7 Westferry Circus, Canary Wharf, London, E14 4HB, UK Tel. (44-20) 74 18 84 00 Fax (44-20) 75 23 70 51 E-mail: [email protected] http://www.emea.europa.eu © European Medicines Agency, 2008. Reproduction is authorised provided the source is acknowledged TABLE OF CONTENTS Page 1. BACKGROUND INFORMATION ON THE PROCEDURE........................................... 3 1.1 Submission of the dossier ........................................................................................................ 3 1.2 Steps taken for the assessment of the product.......................................................................... 3 2 SCIENTIFIC DISCUSSION................................................................................................. 4 2.1 Introduction.............................................................................................................................. 4 2.2 Quality aspects......................................................................................................................... 4 2.3 Non-clinical aspects............................................................................................................... 11 2.4 Clinical aspects ...................................................................................................................... 24 2.5 Pharmacovigilance................................................................................................................. 45 2.6 Overall conclusions, risk/benefit assessment and recommendation ...................................... 48 Page 2 of 52 1. BACKGROUND INFORMATION ON THE PROCEDURE 1.1 Submission of the dossier The applicant UCB Pharma S.A. (previously Schwarz Pharma AG) submitted on 2 May 2007 an application for Marketing Authorisation to the European Medicines Agency (EMEA) for Vimpat, through the centralised procedure under Article 3 (2) (a) of Regulation (EC) No 726/2004. The eligibility to the centralised procedure was agreed upon by the EMEA/CHMP on 18 October 2006. The legal basis for this application refers to: Article 8.3 of Directive 2001/83/EC, as amended - complete and independent application The application submitted is a complete dossier composed of administrative information, complete quality data, non-clinical and clinical data based on applicants’ own tests and studies and/or bibliographic literature substituting/supporting certain test(s) or study(ies). Scientific Advice: The applicant did not seek scientific advice at the CHMP. Licensing status: A new application was filed in the following countries: USA (28 September 2007). The product was not licensed in any country at the time of submission of the application. The Rapporteur and Co-Rapporteur appointed by the CHMP were: Rapporteur: Tomas P Salmonson Co-Rapporteur: Giuseppe Nisticó 1.2 Steps taken for the assessment of the product • The application was received by the EMEA on 2 May 2007. • The procedure started on 23 May 2007. • The Rapporteur's first Assessment Report was circulated to all CHMP members on 10 August 2007. The Co-Rapporteur's first Assessment Report was circulated to all CHMP members on 3 August 2007. • During the meeting on 17-20 September 2007, the CHMP agreed on the consolidated List of Questions to be sent to the applicant. The final consolidated List of Questions was sent to the applicant on 20 September 2007. • The applicant submitted the responses to the CHMP consolidated List of Questions on 21 February 2008. • The Rapporteurs circulated the Joint Assessment Report on the applicant’s responses to the List of Questions to all CHMP members on 07 April 2008. • During the CHMP meeting on 21-24 April 2008, the CHMP agreed on a list of outstanding issues to be addressed in writing by the applicant. • The applicant submitted the responses to the CHMP consolidated List of outstanding issues on 22 May 2008. • The Rapporteurs circulated the Joint Assessment Report on the applicant’s responses to the list of outstanding issues to all CHMP members on 11 June 2008. • During the meeting on 23-26 June 2008, the CHMP, in the light of the overall data submitted and the scientific discussion within the Committee, issued a positive opinion for granting a Marketing Authorisation to Vimpat on 26 June 2008. The applicant provided the letter of undertaking on the follow-up measures to be fulfilled post-authorisation on 26 June 2008. Page 3 of 52 2 SCIENTIFIC DISCUSSION 2.1 Introduction The proposed indication for Vimpat (lacosamide) is adjunctive therapy in the treatment of partial- onset seizures with or without secondary generalization in patients with epilepsy aged 16 years and older. Lacosamide was synthesized as a member of a family of functionalized amino acids, more specifically, analogues of the endogenous amino acid and NMDA-receptor modulator D-serine. The mechanism of action of lacosamide has to be considered still not fully elucidated. However, a dual mode of action is hypothesised: it selectively enhances slow inactivation of voltage-gated sodium channels (VGSC) and interacts with collapsin response mediator protein-2 (CRMP-2), a protein mainly expressed in the central nervous system (CNS) and involved in neuronal differentiation and axonal outgrowth. Lacosamide showed an antiepileptic activity in different rodent seizure models for generalized and complex partial-onset seizures and status epilepticus. Epilepsy which is defined by the recurrence of spontaneous/unprovoked seizures – i.e. seizures not provoked by systemic, metabolic or toxic disorders – constitutes a vast ensemble of very diverse clinical situations which differ by age of onset, type of seizures, aetiological background, resulting handicap, prognosis and response to treatment. More than 50 million adults and children are estimated to suffer from epilepsy world-wide. The two highest peaks of incidence are in children and in the elderly population (above 65 years). Prevalence estimates of epilepsy in the total population varies from 4 to 8 per 10000 subjects. The classification of epileptic seizures is based on clinical manifestation. The 3 main types are generalized, partial-onset (which may become secondarily generalized), and unclassified. Partial-onset epilepsies, associated with a local cerebral lesion, are the most frequent, representing approximately 60% of cases. Generalized epilepsies represent approximately 30% of cases. In the remaining 10% of seizures, the classification is uncertain. Although some forms of epilepsy may benefit from surgical treatment and others may not require any treatment at all, most patients with epilepsy require chronic pharmacological therapy. In the past decade, several new options for the medical treatment of epilepsy have been introduced, including novel antiepileptic drugs (AEDs) and vagus nerve stimulation (VNS). The new AEDs differ from older agents in several important ways, including mechanism of action, spectrum of activity, and pharmacokinetics. However, more than 30% of patients still have inadequate seizure control or experience significant adverse drug effects on currently available AEDs. Therefore, there is still a need for AEDs with improved effectiveness and tolerability. 2.2 Quality aspects Introduction Vimpat application comprises three different pharmaceutical formulations: − film-coated tablets containing 50, 100, 150 and 200 mg of lacosamide as active substance, − oral solution containing 15 mg/ml of lacosamide as active substance, − solution for infusion containing 10 mg/ml of lacosamide as active substance, The ingredients of the film-coated tablets are: microcrystalline cellulose, crospovidone, hydroxypropyl cellulose, low-substituted hydroxypropyl cellulose, magnesium stearate (vegetable origin), silicified microcrystalline cellulose (Prosolv HD 90) and purified water. The film-coated tablets are packaged in PVC/PVDC blisters sealed with aluminium foils. The oral solution contains the following ingredients: glycerol, carboxymethylcellulose, sorbitol (liquid crystallizing), macrogol 4000, sodium chloride, anhydrous citric acid, acesulfam potassium, sodium propyl parahydroxybenzoate, sodium methyl parahydroxybenzoate, purified water, strawberry flavours and masking flavours. Page 4 of 52 The oral solution is packed in glass type III, or PET, bottles with childproof and tamper-evident PP cap. For dosing purposes a 15 mL polypropylene measuring cup is provided. Finally, the solution for infusion contains sodium chloride, diluted (10%) hydrochloric acid and water for injections. The solution for infusion is packaged in type I glass vials closed with a latex-free chlorobutyl rubber stopper coated with a fluoropolymer on the lower side. Active Substance INN Name: Lacosamide Chemical name: (R)-2-Acetamido-N-benzyl-3-methoxypropionamide (IUPAC) Structural formula: Molecular formula: C13H18N2O3 Relative molecular mass: 250.30 Lacosamide is a white to light yellow non-hygroscopic powder sparingly soluble in aqueous solvents at both 25°C and 37°C and it may be classified as a Biopharmaceutics Classification System (BCS) class 1 drug substance. Its chemical name is (R)-2-acetamido-N-benzyl-3-methoxypropionamide. Four crystalline modifications and one amorphous form of lacosamide have been identified but only