Public Assessment Report Scientific Discussion Riseteva 75 Mg Film
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Public Assessment Report Scientific discussion Riseteva 75 mg film-coated tablets Risedronate sodium DK/H/2020/001/DC This module reflects the scientific discussion for the approval of Riseteva. The procedure was finalised on 18 May 2011. For information on changes after this date please refer to the module ‘Update’. 1/7 I. INTRODUCTION Based on the review of the quality, safety and efficacy data, the Member States have granted a marketing authorisation for Riseteva 75 mg film-coated tablets, from Teva Denmark A/S. The product was authorised in Denmark on 28 June 2011. The product is indicated for treatment of osteoporosis in postmenopausal women at increased risk of fractures. Risedronate sodium belongs to the pharmaco-therapeutic group of bisphosphonates (ATC code: M05 BA07). It is a pyridinyl bisphosphonate that inhibits osteoclast-mediated bone resorption by binding to bone hydroxyapatite. This decentralised procedure concerns a generic application claiming essential similarity with the reference product Optinate/Optinate Septimum/Actonel which has been registered in the EEA by Aventis Pharma/Sanofi and Procter & Gamble since 1998. In Denmark Optinate film-coated tablets and Optinate Septimum 35 mg film-coated tablets, Sanofi- Aventis, have been registered since 1999 and 2004, respectively. The marketing authorisation is granted based on article 10.1 of Directive 2001/83/EC. II. QUALITY ASPECTS II.1 Introduction Each film-coated tablet contains 75 mg risedronate sodium (equivalent to 69.6 mg risedronic acid). The tablets are pink, round, biconvex, film-coated tablets engraved “R 75” on one side and plain on the other. The tablets are packed in transparent PVC/PVdC – Aluminium blister packs in a cardboard carton in pack sizes of 2, 4, 6, 8 or 12 tablets. However, not all pack sizes may be marketed. Compliance with Good Manufacturing Practice The RMS has been assured that acceptable standards of GMP (see Directive 2003/94/EC) are in place for this product type at all sites responsible for the manufacturing of the active substance as well as for the manufacturing and assembly of this product prior to granting its national authorisation. II.2 Drug Substance rINN: Risedronate sodium Compendial names: Risedronate sodium (USP) Chemical name(s): [1-hydroxy-2-(3-pyridinyl)ethylidene]bis[phosphonic acid]monosodium salt Molecular formula: C7H10NO7P2Na.H2O Molecular mass: 323.10 Structural formula: 2/7 Risedronate soidum is a white to pale yellow (or off-white) solid. It is soluble in water and in aqueous solutions, and essentially insoluble in common organic solvents. Several crystal forms of risedronate sodium are known from the literature. Risedronate sodium is not monographed in Ph.Eur. The applicant sources the substance from a single supplier. The documentation on the active substance risedronate sodium is presented as a European Drug Master File/Active Substance Master File (DMF). The Applicant’s Part of the DMF has been forwarded by the Applicant. The Applicant’s and Restricted Part plus a LoA have been forwarded by the ASM. Details on the synthesis, starting materials, methods of analysis and their validations are all satisfactory. Impurities are adequately controlled. Specifications are satisfactory and test methods have been presented in adequate detail. Validation data are satisfactory. Stability studies have been performed with the drug substance. No significant changes in any parameters were observed. The proposed retest period is justified. The applicant specification for risedronate sodium reflects parameters and limits applied by the ASM and the same analytical methods are employed. II.3 Medicinal Product The drug product is film-coated tablets containing 75 mg risedronate sodium. The product is to be marketed in transparent PVC/PVdC/Al blisters. The product composition is adequately described. The development of the product has been satisfactorily performed and explained. No incompatibilities between the active substance and the excipients are observed. Excipients are those commonly used for manufacture of a film-coated tablet. The packaging material is standard and shown suitable by the presented stability studies. Product manufacture is by standard processing and employs a wet granulation process followed by tabletting and film-coating. Validation data are provided for small production scale batches. The results obtained show that the process is adequately controlled, reproducible and robust. The product specifications cover appropriate parameters for this dosage form. Validations of the analytical methods have been presented. Batch analysis has been performed on two batches of the lower range of the proposed production scale batch size. The batch analysis results show that the finished products meet the proposed specifications. The conditions used in the stability studies are according to the ICH stability guideline. The control tests and specifications for drug product are adequately drawn up. A shelf-life of 24 months when packaged in transparent PVC/PVdC – aluminium blisters is considered acceptable. III. NON-CLINICAL ASPECTS This product is a generic formulation of Optinate/Optinate Septimum/Actonel, which is available on the European market. No new preclinical data have been submitted, and therefore the application has not undergone preclinical assessment. This is acceptable for this type of application Environmental risk assessment 3/7 The product is intended as a substitute for other identical products on the market. The approval of this product will not result in an increase in the total quantity of risedronate sodium released into the environment. It does not contain any component, which results in an additional hazard to the environment during storage, distribution, use and disposal. IV. CLINICAL ASPECTS IV.1 Introduction Risedronate sodium is a well-known active substance with established efficacy and tolerability. Absorption of risedronate after an oral dose is rapid (tmax approx. 1 hour), and occurs throughout the upper gastrointestinal tract. Linear kinetics in the dose range of 35-75 mg is demonstrated in relation with a biowaiver. The mean oral bioavailability of the tablet formulation is 0.63% and is bioequivalent to a solution. Risedronate is excreted unchanged primarily via the kidney. Since it is not metabolised, risedronate does not induce or inhibit hepatic cytochrome P450 enzymes. The absorption of risedronate is significantly inhibited by food. The extent of absorption when administered 30 minutes before breakfast is reduced by 55% compared to dosing in the fasting state (i.e. no food or drink for 10 hours prior to or 4 hours after dosing). Dosing 1 hour prior to breakfast reduces extent of absorption by 30% compared to dosing in the fasting state. Dosing either 30 minutes prior to breakfast or 2 hours after a meal results in a similar extent of absorption. Approximately half of the absorbed dose is excreted in urine within 24 hours, and 85% of an intravenous dose is recovered in the urine over 28 days. Once risedronate is absorbed, the serum concentration-time profile is multiphasic with an initial half-life of about 1.5 hours and a terminal exponential half-life of 480 hours. Although the elimination rate of bisphosphonates from human bone is unknown, the 480-hour half-life is hypothesized to represent the dissociation of risedronate from the surface of the bone. For this generic application, the MAH has submitted two bioequivalence studies under fasting conditions in which the pharmacokinetic profile of the test product Risedronatnatrium “Teva” 35 mg film-coated tablets is compared with the pharmacokinetic profile of the reference product Actonel 35 mg film-coated tablets, Aventis Pharma, from the German market. It is suggested to claim bioequivalence of Riseteva 75 mg film-coated tablets with Actonel 75 mg film-coated tablets based on the two bioequivalence studies performed on the 35 mg tablets. The second study was a confirmatory study, since in the first study the 90% CI for Cmax was just outside the general acceptance limits of 80-125% (79.09-103.50%). The number and type of bioequivalence studies are considered sufficient for the present application for an immediate release formulation. Main study The main study was performed as a single centre, randomized, single dose, 2-period, 2-sequence, crossover study conducted under fasting conditions with a wash out period of 7 days between administrations. 1x35 mg film-coated tablet was administered in each period with 240 ml water after an overnight fast of at least 10 hours. Blood samples were collected pre-dosing and at various time- points up to 24 hours post administration of a single-dose 35 mg tablet with 240 ml of water for the analyses of risedronic acid. 80 healthy non-smoking male subjects (19-53 years; 62 Caucasians, 10 Black and 3 Asian (of the 75 included in data analysis)) participated in the study. 75 subjects completed the study and were used for the pharmacokinetic and statistical analysis. 4/7 The primary pharmacokinetic variables evaluated were AUC0-t, AUC0-∞, and Cmax and bioequivalence was determined based on limits of 80-125% for AUC0-t and AUC0-∞, and 75-133% for Cmax. The 90% confidence interval for both AUC parameters was within the acceptance range of 80-125%, whereas the 90% confidence interval for Cmax was just outside the lower limit of the acceptance range (79.09- 103.5%). Results Pharmacokinetic parameters (non-transformed values; arithmetic mean ± SD, tmax median, range): N=75 Treatment AUC0-t AUC0-∞ Cmax tmax t½ ng.h/ml ng.h/ml ng/ml h h Test 47.705 51.527 14.305 1.26 7.58 (S.D.) (36.063) (39.190) (11.452) (0.25-4.00) (5.47) Reference 49.104 53.000 14.923 1.19 8.66 (S.D.) (32.484) (35.182) (9.830) (0.25-4.00) (6.78) *Ratio (90% 94.15% 94.22% 90.48% - - CI) (83.20- (83.12- (79.09- 106.53%) 106.82%) 103.50%) Intra-subject 48 48 53 - - CV (%) A widening of the limits is not considered acceptable, however taking into account the additional confirmative study (see below), bioequivalence between the test and reference product can be concluded.