Dataset Information

Clinical and pharmacokinetics equivalence of multiple doses of levodopa benserazide generic formulation vs the originator (Madopar).

ABSTRACT: AIMS:While several generic preparations of levodopa/carbidopa and levodopa/benserazide (LBD) are currently available, pharmacokinetic (PK) equivalence and therapeutic equivalence studies with levodopa generics are not available in Italy. Lack of data on generic formulations is a critical factor for their limited use in this country and often lead patients to refuse the generic version of the branded drug. METHODS:An experimental, 2-centre, randomized, double-blind, 2-sequence, noninferiority cross-over study was designed to evaluate both the PK equivalence and clinical equivalence of multiple doses of the generic preparation of LDB, Teva Italia, compared to the originator (Madopar). Forty-three out-patients with a diagnosis of idiopathic Parkinson's disease on LDB, were recruited and randomly assigned to 1 of 2 study sequences: generic-originator or originator-generic. Clinical evaluations were performed at the end of each study period. A PK study with an LDB fixed dose (100 + 25 mg) was performed in a subpopulation of 14 subjects. RESULTS:Clinical data showed a reduction of 0.49 and 1.54 in the mean UPDRS III scores for the LDB and the originator, respectively. The 95% CIs [-2.21: 0.11] of the mean difference original vs LDB are smaller than the clinically significant difference of 3 UPDRS III points, supporting the conclusion that the treatment with LDB is not inferior to the originator. No statistically significant differences were found with respect to area under the curve to last dose, half-life, maximum concentration, time to maximum concentration and last observed concentration. CONCLUSION:These findings prove the therapeutic clinical equivalence as well the PK equivalence of the generic LDB and the originator (Madopar).

SUBMITTER: Torti M

PROVIDER: S-EPMC6848900 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature

ACCESS DATA

Publications

Clinical and pharmacokinetics equivalence of multiple doses of levodopa benserazide generic formulation vs the originator (Madopar).

Torti Margherita M Alessandroni Jhessica J Bravi Daniele D Casali Miriam M Grassini Paola P Fossati Chiara C Ialongo Cristiano C Onofrj Marco M Radicati Fabiana Giada FG Vacca Laura L Bonassi Stefano S Stocchi Fabrizio F

British journal of clinical pharmacology 20190912 11

<h4>Aims</h4>While several generic preparations of levodopa/carbidopa and levodopa/benserazide (LBD) are currently available, pharmacokinetic (PK) equivalence and therapeutic equivalence studies with levodopa generics are not available in Italy. Lack of data on generic formulations is a critical factor for their limited use in this country and often lead patients to refuse the generic version of the branded drug.<h4>Methods</h4>An experimental, 2-centre, randomized, double-blind, 2-sequence, non ...[more]

PMID: 31378952

Similar Datasets

Project description:BACKGROUND AND OBJECTIVE:Abiraterone acetate is approved for the treatment of metastatic castration-resistant prostate cancer. The originator abiraterone acetate (OAA) formulation is poorly absorbed and exhibits large pharmacokinetic variability in abiraterone exposure. Abiraterone acetate fine particle (AAFP) is a proprietary formulation (using SoluMatrix Fine Particle Technology™) designed to increase the oral bioavailability of abiraterone acetate. Here, we report on two phase I studies in healthy male subjects aged 18-50 years. METHODS:In Study 101, 20 subjects were randomized in a crossover design to single doses of AAFP 100, 200, or 400 mg or OAA 1000 mg taken orally under fasting conditions. Results suggested that AAFP 500 mg would be bioequivalent to OAA 1000 mg in the fasted state. To confirm the bioequivalence hypothesis and to further expand the AAFP dose range, in Study 102, 36 subjects were randomized in a crossover design to single doses of AAFP 125, 500, or 625 mg or OAA 1000 mg. Both studies included a 7-day washout period between administrations. RESULTS:Dose-dependent increases in the area under the plasma concentration-time curve and maximum plasma concentration with AAFP were observed in both studies. The AAFP 500-mg bioavailability relative to OAA 1000 mg measured by the geometric mean ratio for area under the plasma concentration-time curve from time zero to the time of the last quantifiable concentration was 93.4% (90% confidence interval 85.3-102.4), area under the plasma concentration-time curve from time zero to infinity was 91.0% (90% confidence interval 83.3-99.4), and maximum plasma concentration was 99.8% (90% confidence interval 86.3-115.5). Dose proportionality was seen across all AAFP dose levels (100-625 mg). Abiraterone acetate fine particle was found to be safe and well tolerated in this study. CONCLUSION:Abiraterone acetate fine particle 500 mg was demonstrated to be bioequivalent to OAA 1000 mg in healthy volunteers under fasted conditions.

Project description:BACKGROUND AND OBJECTIVE:Dabigatran etexilate is a non-vitamin K antagonist oral anticoagulant (NOAC) that is used to prevent stroke and systemic embolism in adults with nonvalvular atrial fibrillation (NVAF) and one or more risk factors. Pharmacokinetic data on this anticoagulant in Chinese subjects are limited. This study aimed to provide further information on the pharmacokinetic profile of dabigatran in healthy Chinese subjects, together with its safety profile. METHODS:This was an open-label, single-centre, phase I study. Subjects were randomized into 110 and 150 mg dabigatran etexilate treatment groups. Each subject received 7 days of treatment: a single dose on day 1, no dose on days 2-3, and then multiple doses on days 4-10. Blood samples were collected to analyze the pharmacokinetic profile of dabigatran. All adverse events (AEs) were recorded. Routine clinical laboratory tests, a physical examination, vital signs, and 12-lead electrocardiogram (ECG) measurements were performed. RESULTS:A total of 28 subjects (14 males and 14 females) were randomized in this trial. The plasma concentration of total dabigatran reached its maximum measured concentration at a median time of 3-4 h from the dose of interest (either the initial single dose on day 1 or the final dose on day 10) under fed conditions, and declined with an elimination half-life of 10.7-10.9 h following the dose of interest. There was a modest difference in pharmacokinetic profile between male and female subjects. None of the subjects experienced a serious adverse event (SAE) or an AE of moderate or severe intensity. The investigator reported that 17 of the 28 subjects had mild treatment-emergent AEs that resolved without any concomitant treatment or intervention. No clinically significant changes in vital signs or ECG parameters were observed. CONCLUSIONS:This study revealed the pharmacokinetic characteristics and good safety profile of dabigatran in healthy Chinese subjects.

Dataset Information

Clinical and pharmacokinetics equivalence of multiple doses of levodopa benserazide generic formulation vs the originator (Madopar).

Publications

Clinical and pharmacokinetics equivalence of multiple doses of levodopa benserazide generic formulation vs the originator (Madopar).

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure