E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
Patients with idiopathic Parkinson's disease and levodopa-induced dyskinesias |
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MedDRA Classification |
E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 13.1 |
E.1.2 | Level | PT |
E.1.2 | Classification code | 10013916 |
E.1.2 | Term | Dyskinesia |
E.1.2 | System Organ Class | 10029205 - Nervous system disorders |
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E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 13.1 |
E.1.2 | Level | PT |
E.1.2 | Classification code | 10061536 |
E.1.2 | Term | Parkinson's disease |
E.1.2 | System Organ Class | 10029205 - Nervous system disorders |
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E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 13.1 |
E.1.2 | Level | HLT |
E.1.2 | Classification code | 10034005 |
E.1.2 | Term | Parkinson's disease and parkinsonism |
E.1.2 | System Organ Class | 10029205 - Nervous system disorders |
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E.1.3 | Condition being studied is a rare disease | No |
E.2 Objective of the trial |
E.2.1 | Main objective of the trial |
To evaluate the antidyskinetic efficacy of topiramate in patients with PD and levodopa-induced dyskinesias in a randomized, double-blind, placebo-controlled, crossover trial |
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E.2.2 | Secondary objectives of the trial |
To evaluate the effect of topiramate on parkinsonism. |
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
Patients meet UK Parkinson's Disease Society Brain Bank diagnostic criteria for idiopathic Parkinson's Disease (PD). Patients taking levodopa, with stable levodopa-induced dyskinesias. Stable antiparkinsonian medications for at least one month prior to enrollment. |
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E.4 | Principal exclusion criteria |
Hypersensitivity to topiramate or its excipients. Prior surgery for PD. Hoehn and Yahr score of 5 when 'off'. History of nephrolithiasis, renal impairment, liver disease, glaucoma. Pregnancy or breastfeeding. Premenopausal females and males not using adequate contraception. Use of other antiepileptic drugs, carbonic anhydrase inhibitors, metformin, digoxin, illicit drugs. Dementia as defined by MMSE<24 |
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E.5 End points |
E.5.1 | Primary end point(s) |
Investigator-rated dyskinesia severity will be the primary outcome measure. During each video assessment, dyskinesia severity will be rated during a five-minute observation period at intervals of 30 minutes, for a total duration of 150 minutes. This period will encompass the predicted duration of peak-dose dyskinesia. Dyskinesia severity will be rated by post hoc analysis of videotape recordings made after drug administration. A movement disorders specialist who is not involved in the levodopa challenges and who is blinded to the treatment arms will score the videotape. Dyskinesia will be rated using a 5-point objective dyskinesia intensity rating scale,[32] rating 7 body parts (each limb, face, neck and trunk), with a maximum possible total score 28, where: 0. No dyskinesia present. 1. Questionable or mild dyskinesia. 2. Moderate amplitude but quite apparent abnormal postures or movements that are not intrusive. 3. Large amplitude movements or postures that may distort and mildly or moderately disturb voluntary movements. 4. Severe and grotesque postures or movements that markedly disturb posture or ongoing voluntary activities. Total peak-dose dyskinesia, the area under the curve (AUC) summation, will be determined and the percent change from baseline evaluated. |
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E.6 and E.7 Scope of the trial |
E.6 | Scope of the trial |
E.6.1 | Diagnosis | No |
E.6.2 | Prophylaxis | No |
E.6.3 | Therapy | Yes |
E.6.4 | Safety | Yes |
E.6.5 | Efficacy | Yes |
E.6.6 | Pharmacokinetic | No |
E.6.7 | Pharmacodynamic | No |
E.6.8 | Bioequivalence | No |
E.6.9 | Dose response | No |
E.6.10 | Pharmacogenetic | No |
E.6.11 | Pharmacogenomic | No |
E.6.12 | Pharmacoeconomic | No |
E.6.13 | Others | No |
E.7 | Trial type and phase |
E.7.1 | Human pharmacology (Phase I) | No |
E.7.1.1 | First administration to humans | No |
E.7.1.2 | Bioequivalence study | No |
E.7.1.3 | Other | No |
E.7.1.3.1 | Other trial type description | |
E.7.2 | Therapeutic exploratory (Phase II) | No |
E.7.3 | Therapeutic confirmatory (Phase III) | No |
E.7.4 | Therapeutic use (Phase IV) | Yes |
E.8 Design of the trial |
E.8.1 | Controlled | Yes |
E.8.1.1 | Randomised | Yes |
E.8.1.2 | Open | No |
E.8.1.3 | Single blind | No |
E.8.1.4 | Double blind | Yes |
E.8.1.5 | Parallel group | No |
E.8.1.6 | Cross over | Yes |
E.8.1.7 | Other | No |
E.8.2 | Comparator of controlled trial |
E.8.2.1 | Other medicinal product(s) | Information not present in EudraCT |
E.8.2.2 | Placebo | Yes |
E.8.2.3 | Other | No |
E.8.3 |
The trial involves single site in the Member State concerned
| No |
E.8.4 | The trial involves multiple sites in the Member State concerned | Yes |
E.8.4.1 | Number of sites anticipated in Member State concerned | 3 |
E.8.5 | The trial involves multiple Member States | No |
E.8.6 Trial involving sites outside the EEA |
E.8.6.1 | Trial being conducted both within and outside the EEA | No |
E.8.6.2 | Trial being conducted completely outside of the EEA | Information not present in EudraCT |
E.8.7 | Trial has a data monitoring committee | Yes |
E.8.8 |
Definition of the end of the trial and justification where it is not the last
visit of the last subject undergoing the trial
|
Last assessment of final trial subject |
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E.8.9 Initial estimate of the duration of the trial |
E.8.9.1 | In the Member State concerned years | 2 |
E.8.9.1 | In the Member State concerned months | 9 |
E.8.9.1 | In the Member State concerned days | |