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Tapentadol (CG5503)

A Randomized Double-Blind, Placebo- and Active-Control, Parallel-arm, Phase III Trial With Controlled Adjustment of Dose to Evaluate the Efficacy and Safety of CG5503 Extended-Release (ER) in Patients With Moderate to Severe Chronic Pain Due to Osteoarthritis of the Knee

The purpose of this trial is to evaluate the effectiveness (level of pain control) and safety of orally administered tapentadol (CG5503) Extended Release (ER) (base) at doses of 100-250 mg twice daily in patients with moderate to severe chronic pain due to osteoarthritis of the knee, in comparison with placebo and Oxycodone Controlled Release (CR).

調査の概要

詳細な説明

The primary objective of this randomized (study medication assigned to patients by chance), double-blind (neither patient nor investigator knows the study medication) , phase III, placebo and active controlled trial is to evaluate the efficacy and safety of orally administered tapentadol (CG5503) Extended Release (ER) (base) at doses of 100-250 mg twice daily in patients with moderate to severe chronic pain from osteoarthritis (OA) of the knee. The study is being conducted for registration and approval of tapentadol (CG5503) in the US and outside the US. The trial will consist of five periods: screening (to assess eligibility) , washout (3-7 days with determination of a baseline pain intensity), titration (of dose over 3 weeks to the optimal individual level) , maintenance (investigational drug intake for 12 weeks with adjustments allowed), and follow-up (2 weeks post treatment discontinuation). The study hypothesis is that the study drug will be more effective than placebo in reducing patients pain intensity. The Secondary objectives include the collection of pharmacokinetic (related to how the body uses the drug) information for dose verification. The trial objectives will be assessed by comparing the baseline pain level to the level of week 12 of the maintenance phase. This will be done by looking at the patient's pain diary information. Titrate tapentadol (CG5503) ER (extended release) 50mg to patient's optimal dose ranging between 100mg and 250mg twice a day; Oxycodone CR (controlled release) 10mg to 50mg twice a day; Placebo (no active ingredients). All doses of trial treatment will be taken orally with approximately 120 mL of water with or without food for a maximum timeframe of 15 weeks.

研究の種類

介入

入学 (実際)

1030

段階

  • フェーズ 3

参加基準

研究者は、適格基準と呼ばれる特定の説明に適合する人を探します。これらの基準のいくつかの例は、人の一般的な健康状態または以前の治療です。

適格基準

就学可能な年齢

40年歳以上 (大人、高齢者)

健康ボランティアの受け入れ

いいえ

受講資格のある性別

全て

説明

Inclusion Criteria:

  • Patients diagnosed with osteoarthritis of the knee based on the American College of Rheumatology (ACR) criteria and functional capacity class of I-III
  • patients taking analgesic medications for at least 3 months prior to screening and/or dissatisfied with their current therapy
  • Patients requiring opioid treatment must be taking daily doses of opioid-based analgesic, equivalent to <160 mg of oral morphine
  • baseline score of greater than or equal to 5 on an 11-point numerical rating scale, calculated as the average pain intensity during the last 3 days prior to randomization.

Exclusion Criteria:

  • History of alcohol and/or drug abuse in Investigator's judgement
  • history of significant liver insufficiency
  • chronic hepatitis B or C, or HIV, presence of active hepatitis B or C within the past 3 months
  • life-long history of seizure disorder or epilepsy
  • history of malignancy within past 2 years, with exception of basal cell carcinoma that has been successfully treated
  • uncontrolled hypertension
  • patients with severely impaired renal function
  • patients with moderate to severly impaired hepatic function or with laboratory values reflecting inadequate hepatic function

研究計画

このセクションでは、研究がどのように設計され、研究が何を測定しているかなど、研究計画の詳細を提供します。

研究はどのように設計されていますか?

デザインの詳細

  • 主な目的:処理
  • 割り当て:ランダム化
  • 介入モデル:並列代入
  • マスキング:4倍

武器と介入

参加者グループ / アーム
介入・治療
実験的:001
tapentadol (CG5503) 50 100 150 200 250mg twice a day (BID) during 15 weeks
50, 100, 150, 200, 250mg twice a day (BID) during 15 weeks
アクティブコンパレータ:002
oxycodone 10 20 30 40 50mg twice a day (BID) during 15 weeks
10, 20, 30, 40, 50mg twice a day (BID) during 15 weeks
プラセボコンパレーター:003
placebo matching placebo twice a day (BID) during 15 weeks
matching placebo twice a day (BID) during 15 weeks

この研究は何を測定していますか?

主要な結果の測定

結果測定
メジャーの説明
時間枠
Change From Baseline of the Average Pain Intensity Based on an 11-point Numerical Rating Scale(NRS) Over the Last Week of the Maintenance Period at Week 12.
時間枠:Baseline and 12 weeks (Primary endpoint is the average pain intensity score during the last week of the maintenance period).
For this twice daily pain assessment, the subjects were to indicate the level of pain experienced over the previous 12 hours on an 11-point Numerical Rating Scale (NRS) where a score of 0 indicated "no pain" and a score of 10 indicated "pain as bad as you can imagine".
Baseline and 12 weeks (Primary endpoint is the average pain intensity score during the last week of the maintenance period).

二次結果の測定

結果測定
メジャーの説明
時間枠
Change From Baseline in Western Ontario McMaster Questionnaire (WOMAC) Assessing Pain, Disability and Joint Stiffness of the Knee Over the Last Week of the Maintenance Period at Week 12
時間枠:Baseline and 12 week endpoint
Change from baseline to Week 12 of WOMAC Global Score: WOMAC is measure with a Likert ordinal scale from 0-4 with lower scores indicating lower levels of symptoms or physical disability
Baseline and 12 week endpoint
Change From Baseline in Sleep Latency Time in Hours Over the Last Week of the Maintenance Period at Week 12.
時間枠:Baseline and 12 week endpoint
A Sleep Questionniare addressed the following question: "How long after bedtime/lights out did you fall asleep last night (hours)?" 12 week endpoint-mean changes from baseline at endpoint for sleep latency. Decrease in time(hours) indicates improvement.
Baseline and 12 week endpoint
Percentage of Patients Who Reported Very Much Improved or Much Improved From Baseline in Patient Global Impression of Change Over the Last Week of the Maintenance Period at Week 12
時間枠:Baseline and 12 week endpoint
Ordinal measure indicating change from start of treatment (on a scale of 7 = Very much worse to 1 = Very much improved)
Baseline and 12 week endpoint
Distribution of Time to Treatment Discontinuation Due to Lack of Efficacy
時間枠:Baseline to 12 weeks
The median time to treatment discontinuation due to lack of efficacy from baseline to endpoint
Baseline to 12 weeks
Change From Baseline in EuroQol-5 (EQ-5D) Health Status Index to Week 12
時間枠:Baseline and 12 week endpoint
Change from baseline to end point in EuroQol-5 (EQ-5D) Dimension Questionnaire. A higher score indicates an improvement in health in the Health Status Index. The EQ-5D is a five dimensional health state classification. Each dimension is assessed on a 3-point ordinal scale (1=no problems, 2=some problems, 3=extreme problems). The responses to the five EQ-5D dimensions were scored using a utility-weighted algorithm to derive an EQ-5D health status index score between 0 to 1, with 1.00 indicating "full health" and 0 representing dead
Baseline and 12 week endpoint
Change From Baseline in Responder Analysis 50% Improvement to Week 12
時間枠:Baseline and Week 12
Defined by the percentage of subjects achieving at least 50% improvement from baseline in the primary endpoint based on the 11-point NRS at week 12. For this twice daily pain assessment, the subjects were to indicate the level of pain experienced over the previous 12 hours on an 11-point Numerical Rating Scale (NRS) where a score of 0 indicated "no pain" and a score of 10 indicated "pain as bad as you can imagine".
Baseline and Week 12

協力者と研究者

ここでは、この調査に関係する人々や組織を見つけることができます。

出版物と役立つリンク

研究に関する情報を入力する責任者は、自発的にこれらの出版物を提供します。これらは、研究に関連するあらゆるものに関するものである可能性があります。

研究記録日

これらの日付は、ClinicalTrials.gov への研究記録と要約結果の提出の進捗状況を追跡します。研究記録と報告された結果は、国立医学図書館 (NLM) によって審査され、公開 Web サイトに掲載される前に、特定の品質管理基準を満たしていることが確認されます。

主要日程の研究

研究開始

2007年1月1日

一次修了 (実際)

2008年7月1日

研究の完了 (実際)

2008年12月1日

試験登録日

最初に提出

2007年1月12日

QC基準を満たした最初の提出物

2007年1月12日

最初の投稿 (見積もり)

2007年1月15日

学習記録の更新

投稿された最後の更新 (見積もり)

2012年4月18日

QC基準を満たした最後の更新が送信されました

2012年4月16日

最終確認日

2012年4月1日

詳しくは

この情報は、Web サイト clinicaltrials.gov から変更なしで直接取得したものです。研究の詳細を変更、削除、または更新するリクエストがある場合は、register@clinicaltrials.gov。 までご連絡ください。 clinicaltrials.gov に変更が加えられるとすぐに、ウェブサイトでも自動的に更新されます。

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