Assessment of GRT6005 in Painful Osteoarthritis of the Knee
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ClinicalTrials.gov Identifier: NCT01357837 |
Recruitment Status :
Completed
First Posted : May 23, 2011
Last Update Posted : July 15, 2021
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Condition or disease | Intervention/treatment | Phase |
---|---|---|
Osteoarthritis of the Knee | Drug: Matching Placebo Drug: GRT6005 | Phase 2 |
Study Type : | Interventional (Clinical Trial) |
Actual Enrollment : | 207 participants |
Allocation: | Randomized |
Intervention Model: | Parallel Assignment |
Masking: | Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor) |
Primary Purpose: | Treatment |
Official Title: | A Randomized 4 Week Phase IIa Trial Evaluating the Efficacy, Safety, and Tolerability of GRT6005, a New Centrally Acting Analgesic, in Subjects With Moderate to Severe Pain Due to Osteoarthritis (OA) of the Knee |
Study Start Date : | May 2011 |
Actual Primary Completion Date : | December 2011 |
Actual Study Completion Date : | December 2011 |

Arm | Intervention/treatment |
---|---|
Placebo Comparator: Matching Placebo
Once daily oral administration of matching placebo for 4 weeks.
|
Drug: Matching Placebo
2 capsules of matching placebo once a day, in the morning, for a total of 28 days |
Experimental: 75 µg GRT6005
Once daily oral administration of GRT6005 for 4 weeks.
|
Drug: GRT6005
2 capsules containing a total of 75 µg GRT6005 once a day, in the morning, for a total of 28 days |
Experimental: 200 µg GRT6005
Once daily oral administration of GRT6005 for 4 weeks.
|
Drug: GRT6005
2 capsules containing a total of 200 µg GRT6005 once a day, in the morning, for a total of 28 days |
Experimental: 400 µg GRT6005
Once daily oral administration of GRT6005 for 4 weeks.
|
Drug: GRT6005
2 capsules containing a total of 400 µg GRT6005 once a day, in the morning, for a total of 28 days |
- Change from baseline in the pain intensity scores during the last week of the 4-week treatment period [ Time Frame: 4 weeks ]
- Change from baseline in the Western Ontario McMaster Questionnaire (WOMAC) Global Score Assessing Pain, Disability and Joint Stiffness of the Knee Over the 4 week treatment period [ Time Frame: 4 weeks ]
- Change from baseline in quality of health as measured by Short Form-12 Health Survey [ Time Frame: 4 weeks ]
- Response measured in percentage change of pain intensity since baseline [ Time Frame: 4 weeks ]
- Leeds Sleep Evaluation Questionnaire to quantify subjective impressions of sleep and waking [ Time Frame: 4 weeks ]
- Patient's Global Impression of Change (PGIC) [ Time Frame: 4 weeks ]
- Clinician's Global Impression of Change (CGIC) [ Time Frame: 4 weeks ]
- Weekly current pain intensity changes from baseline [ Time Frame: 4 weeks ]
- Rescue medication use [ Time Frame: 4 weeks ]
- Quality of Life EuroQoL-5 Dimension score, change from baseline [ Time Frame: 4 weeks ]
- Clinical Opioid Withdrawal Scale [ Time Frame: 4 weeks ]
- Plasma concentration [ Time Frame: 4 weeks ]
- Discontinuation from study due to treatment related adverse events [ Time Frame: 4 weeks ]
- Time to withdrawal from study [ Time Frame: 4 weeks ]

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Ages Eligible for Study: | 40 Years to 75 Years (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Inclusion Criteria:
- painful Osteoarthritis of the knee based on American College of Rheumatology Criteria
- signed informed consent
- on stable analgesic medications for painful osteoarthritis with regular analgesic intake for at least 3 months
- pain intensity score of 4 or greater on the 11-point numeric rating scale (where 0 indicates "no pain" and 10 indicates "pain as bad as you can imagine").
Exclusion Criteria:
- Substance Abuse
- Significant cardiac disease
- Presence of risk factors for Torsades de Pointes and chronic severe cardiac disease
- History of seizure disorder
- Chronic gastrointestinal disease
- Conditions that contribute and confound to the assessment of pain
- Surgery or painful procedure during or within 3 months of enrollment
- Cancer
- Subjects with impaired renal function
- Subjects with impaired hepatic function
- Female subjects who are breastfeeding
- History of chronic hepatitis B or C or human immunodeficiency virus infection, or presence of acute hepatitis A, B, or C within the past 3 months.
- Clinically relevant history of hypersensitivity or allergy to paracetamol, opioids or the excipients.

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01357837

Principal Investigator: | Jacek Olas, MD | Specjalistyczne Centrum Medyczne NZOZ NOWOMED, |
Responsible Party: | Tris Pharma, Inc. |
ClinicalTrials.gov Identifier: | NCT01357837 |
Other Study ID Numbers: |
116918 2010-022556-23 ( EudraCT Number ) KF6005/03 ( Other Identifier: Sponsor ) |
First Posted: | May 23, 2011 Key Record Dates |
Last Update Posted: | July 15, 2021 |
Last Verified: | July 2021 |
Osteoarthritis, knee Analgesia Pain Painful |
Osteoarthritis Osteoarthritis, Knee Arthritis |
Joint Diseases Musculoskeletal Diseases Rheumatic Diseases |