Evaluation of NaproxenSodium and CodeinePhosphate Combination in Osteoarthritis

Study Overview
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Brief Summary
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Osteoarthritis (OA) pain treatment has limitations in terms of serious adverse effects and low efficacy. The investigators aimed to evaluate efficacy and safety of naproxen sodium/codeine phosphate combination in these patients.

Detailed Description
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In this prospective, randomized, double blind, placebo controlled clinical trial, 135 patients with osteoarthritis, who were 40-65 years; applied to institution's orthopaedics outpatient clinic; had grade 1, 2, or 3 primary osteoarthritis diagnosed in last 1 year; and had Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) score≥40, and Visual Analogue Scale score≥40,were enrolled. Subjects were randomized (1:1) to placebo (n= 67) or combination (n= 68) arms, in which 550 mg naproxen sodium/30mg codeine phosphate was given orally twice a day for 7 days. Rescue medicine was 500 mg paracetamol (max= 6 tablets/day). Demographic characteristics, medical history, adverse events, VAS and WOMAC scores were collected in study visits performed within 10days.The study was approved by local institutional ethics committee and written informed consents were obtained from all participants.

Official Title
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Randomized, Double-blind and Placebo-controlled Evaluation of Efficacy and Safety of Naproxen Sodium and Codeine Phosphate Combination in Osteoarthritis

Conditions
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Osteoarthritis

Intervention / Treatment
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* Drug: Naproxen Sodium Codeine
* Drug: Placebo


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Clinical and radiological diagnosis of primary osteoarthritis (knee and hip) in the recent year according to criteria of American College of Rheumatology (ACR) Grade 1, 2 or 3 osteoarthritis patients Patients 40 to 65 years of age Patients with WOMAC score ≥ 40 Patients with VAS score ≥ 40 Patients who signed the consent form Exclusion Criteria: Grade 4 osteoarthritis patients / Pregnant or breastfeeding mothers Patients with known allergic reaction or intolerance to NSAIDs (nonsteroidal antiinflammatory drugs) Patients hypersensitive to naproxen sodium or codeine Patients who took another analgesic medicine during 24 hours before and/or a nonsteroidal anti-inflammatory medicine during 72 hours before taking study medicine Patients with active gastric or duodenum ulcer Patients with renal dysfunction and/or a kidney disease Patients with severe liver disease Patients with rare hereditary galactose intolerance, Lapp lactase insufficiency or glucose-galactose malabsorption problem Patients with depression treated by a medicine from monoamine oxidase class Patients with uncontrolled hypertension or patients with hypertension that is hardly controlled with medicines Patients with a known medical, psychological disturbance or social status that may negatively affect inclusion into the study or patients who may lead to increase in risk for others with inclusion into the study Patients with proven clinically important and unstable systemic medical disease Patients who have medical contraindication for study medicine Patients who are judged by investigator that they will not adhere or adequately adhere to the study protocol Patients who participated into another study with another study medicine in the last 4 week Patients who intent to donate blood or blood product during the study period or in the following month of the study completion

Ages Eligible for Study
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Minimum Age: 40 Years
Maximum Age: 65 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Naproxen Sodium Codeine<br>One tablet twice a day | Drug: Naproxen Sodium Codeine<br>* One tablet twice a day<br>* Other names: Apranax Plus;|
| Placebo Comparator: Placebo<br>One tablet twice a day | Drug: Placebo<br>* One tablet twice a day<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change in Western Ontario Mac Master Questionnaire (WOMAC) |  | 7 days | 
| Change in Visual Analog Scale (VAS) |  | 7 days | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change in pain severity in all visits after treatment from baseline (VAS) |  | 7 days | 
| Functional effects of combination therapy (WOMAC) |  | 7 days | 
| Change in resting pain after treatment from baseline (WOMAC) |  | 7 days | 
| Change in activity pain after treatment from baseline (WOMAC) |  | 7 days | 
| Change in physical function after treatment from baseline (WOMAC) |  | 7 days | 
| Ratio of rescue medicine use (Rescue medication count) |  | 7 days | 
| Collection of adverse event reports to evaluate safety of the medicine |  | 7 days | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Osteoarthritis, NAPROXEN SODIUM