Efficacy and Safety of Celecoxib/Acetaminophen Versus Celecoxib for Diagnosed Osteoarthritis in Acute Exacerbation

Phase 3

Recruiting

• Conditions: Joint Pain; Knee Osteoarthritis; Hip Osteoarthritis
• Interventions: Drug: Celecoxib + Acetaminohen; Drug: Celecoxi + Acetaminophen; Drug: Celecoxib

• Registration Number: NCT06863636
• Lead Sponsor: Laboratorios Silanes S.A. de C.V.

Brief Summary

This is a Phase III, longitudinal, multicenter, randomized, double-blind clinical trial designed to evaluate the efficacy and safety of a fixed-dose combination of celecoxib and acetaminophen compared to celecoxib monotherapy for the treatment of pain associated with acute exacerbations of osteoarthritis.

Detailed Description

Researchers will evaluate the efficacy and safety of a fixed-dose combination of celecoxib and acetaminophen compared to celecoxib monotherapy for the treatment of pain in patients with osteoarthritis experiencing an acute exacerbation over a 6-week follow-up period. Adverse events related to the study interventions will be recorded throughout the follow-up phase.

Participants will:

Be randomized into one of three intervention groups (A, B, or C).

Attend five scheduled clinic visits (Day 0, and Weeks 1, 2, 4, and 6 of follow-up).

Be permitted to take 500 mg of naproxen as rescue medication, if needed, with prior authorization from the principal investigator.

Study Timeline

• Study Start: 2024-09-09
• Study First Submitted: 2025-03-03
• Study First Submitted QC: 2025-03-06
• Study First Posted: 2025-03-07
• Status Verified: 2025-04
• Last Update Submitted: 2025-04-01
• Last Update Posted: 2025-04-04
• Primary Completion: 2025-10-30
• Study Completion: 2025-11-30

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 231

Inclusion Criteria

• Voluntarily agrees to participate in the study and provides written informed consent.
• Prior diagnosis of knee or hip osteoarthritis based on clinical criteria (according to the American College of Rheumatology (ACR) criteria described in Annex 5).
• Pain in the affected joint with exacerbation lasting no more than 3 weeks.
• Patient reports moderate to severe pain intensity (VAS ≥ 40 mm).
• For women of childbearing potential (a woman is considered fertile after menarche and until postmenopause unless permanently sterile), they must agree to use at least ONE of the following contraceptive methods during the study:

Barrier methods: diaphragm, cervical cap, male condom, female condom, spermicide foam, sponge, or film.

Hormonal methods: combined oral contraceptives, injectable contraceptives, subdermal implant, contraceptive patch.

Intrauterine device (IUD): copper or silver IUD, Levonorgestrel intrauterine system (IUS), and/or combinations of the above as deemed acceptable by the physician.

Women are considered not of childbearing potential if they meet at least ONE of the following criteria:

Postmenopausal. Premenopausal woman with at least ONE of the following: hysterectomy, bilateral salpingectomy, or bilateral oophorectomy.

Male subjects must agree to use a male condom as a contraceptive method during the study.

• At the discretion of the Principal Investigator (PI) or treating physician, the subject has an indication for treatment with the investigational product and may derive clinical benefit from it.

Exclusion Criteria

• Intolerance or allergy to the investigational product or any of its components (as reported in the medical history and patient interview).
• Participation in another clinical study involving an investigational treatment or participation in one within the last two weeks prior to the study start.
• Potential study bias due to employment or relationship with the research center, sponsor, or being part of a vulnerable population.
• Medical conditions affecting prognosis that prevent outpatient management, to be evaluated by the Principal Investigator for subject inclusion relevance.
• History of advanced, severe, progressive, or unstable disease of any kind that may interfere with efficacy and safety assessments or pose a special risk to the patient.
• Medical contraindication to the investigational product.
• History of allergic reaction to NSAIDs (Non-Steroidal Anti-Inflammatory Drugs), Acetaminophen, or known hypersensitivity to any formulation components.
• Significant gastrointestinal disorders, such as gastric ulcers, Crohn's disease, ulcerative colitis, or gastrointestinal bleeding.
• Prior opioid treatment within the last five days, as reported in the medical history.
• History of treatment failure with COX-2 selective inhibitors, as documented in the medical history.
• History of chronic somatic pain unrelated to knee or hip osteoarthritis (e.g., fibromyalgia, metastatic disease, or Paget's disease).
• History of alcohol or drug abuse within the past year.
• Current treatment with NSAIDs, including COX-2 inhibitors, within the last 72 hours before signing informed consent (except for aspirin used for cardioprotective purposes).
• History of arthroscopy, viscosupplementation, or intra-articular steroid use in the last three months.
• Previous surgery on the affected joint within the last six months.
• Major trauma in the affected joint within the last three weeks.
• History of chronic liver failure (Child-Pugh A, B, or C).
• History of acute or severe renal failure (glomerular filtration rate <30 ml/min/1.73 m²), as reported in the medical history.
• Significant coagulation disorders (e.g., Von Willebrand disease, hemophilia, vitamin K deficiency) or current use of anticoagulants.

Oncologic patients (except basal cell carcinoma) or those with severe illnesses that, according to the investigator, have a poor prognosis or a life expectancy of less than one year, including severe mental illness.

• Patients with symptoms suggestive of active COVID-19 infection (e.g., fever, cough, dyspnea) and/or contact within the last 14 days with a suspected or confirmed COVID-19 patient.
• Positive pregnancy test, pregnant women, those currently breastfeeding, or those planning pregnancy during the study period.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Celecoxib+Acetaminophen	Celecoxib + Acetaminohen	Administered orally, 1 tablet a day during 6 weeks
Celecoxib + Acetaminophen	Celecoxi + Acetaminophen	Administered orally, 1 tablet a day during 6 weeks
Celecoxib	Celecoxib	Administered orally, 1 capsule a day during 6 weeks

Primary Outcome Measures

Name	Time	Method
Number of participants Number of participants reporting treatment-related adverse events, as recorded in the patient diary.treatment-related adverse events through the patient's diary record.	6 weeks	To describe the frequency, intensity, and causality of adverse events occurring during the clinical trial, stratified by treatment group. Adverse events will be documented by participants in their patient diaries. Each reported event will be monitored and followed up at the discretion of the investigator.
Comparison of the proportion of patients in each treatment group who, based on the baseline assessment, achieved a response according to the OMERACT-OARSI criteria at Weeks 1, 2, 4, and 6 of follow-up.	6 weeks	OMERACT (Outcome Measures in Rheumatology) and OARSI (Osteoarthritis Research Society International) jointly developed a core outcome set (COS) for clinical trials in hip and knee osteoarthritis. This COS includes four key domains that should be assessed in all trials: pain, physical function, patient global assessment, and- for studies lasting one year or more-joint imaging. In this study, patients will be evaluated by the researcher at follow-up visits occurring at Weeks 1, 2, 4, and 6.

Secondary Outcome Measures

Name	Time	Method
To analyze the mean change in pain scores, as measured by the WOMAC questionnaire, at Weeks 1, 2, 4, and 6 compared to baseline, by treatment group.	6 weeks	The Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) is a disease-specific questionnaire designed to assess physical function, pain, and stiffness in individuals with hip or knee osteoarthritis, based on their experiences over the past 48 hours. In this study, patients will be assessed by the investigator at Weeks 1, 2, 4, and 6 of follow-up.
To analyze the mean change in pain intensity, as measured by the Visual Analog Scale (VAS), at Weeks 1, 2, 4, and 6 compared to baseline, stratified by treatment group.	6 weeks	The Visual Analog Scale (VAS) for pain is a straight line where one end represents no pain and the other represents the worst pain imaginable. The investigator will administer the VAS at each visit to assess the patient's pain intensity. At the end of the clinical trial, the percentage change in pain scores will be calculated and compared across treatment groups.
To analyze the difference in SF-36 quality of life questionnaire scores at six weeks after the initiation of the intervention, compared to baseline, by treatment group.	6 weeks	The Short Form-36 (SF-36) is a generic health survey comprising 36 items designed to measure self-reported Health-Related Quality of Life (HRQoL). It evaluates multiple domains of physical and mental health and generates summary scores for both physical and mental components. In this study, the SF-36 questionnaire will be administered to each patient at baseline and again at Week 6 of follow-up.
Comparison of the proportion of subjects in each treatment group who achieve a reduction of ≥30% in pain intensity, as measured by the Visual Analog Scale (VAS), at Weeks 1, 2, 4, and 6 compared to baseline.	6 weeks	The Visual Analog Scale (VAS) for pain is a unidimensional measurement instrument consisting of a straight line anchored by descriptors, with one end indicating "no pain" and the other representing "the worst pain imaginable." The investigator will administer the VAS at each study visit to evaluate changes in pain intensity. The proportion of patients achieving a pain reduction of more than 30% from baseline will be documented and compared among treatment groups at Weeks 1, 2, 4, and 6.

Trial Locations

Locations (1)

Laboratorio Silanes, S.A. de C.V.; 🇲🇽 Mexico City, Mexico