Low Back Pain | Safety and Efficacy Study of an Etoricoxib and Tizanidine Fixed Dose Combination in Participants With Moderate to Severe Acute Low Back Pain (MK-0663B-164)

Low Back Pain research study

What is the primary objective of this study?

The primary objective of this study is to evaluate the safety and tolerability of MK-0663B (etoricoxib/tizanidine) among participants with moderate-to-severe acute low back pain.

Who is eligible to participate?

Inclusion Criteria: - Have acute low back pain; - Onset of acute low back pain must be <6 weeks prior to screening; - Have acute low back pain corresponding to a rating of ≥ 4 on a 0-10 point Low Back Pain Questionnaire and ≥ 7 on the Roland Morris Questionnaire; - For women of childbearing potential, have a negative serum pregnancy test at Visit 1 (Screening Visit) and agree to remain abstinent, use barrier, or non-hormonal implanted contraceptives from study start until 14 days after the last dose of study drug; - Be willing to limit alcohol use, if any, to 2 drinks or equivalent per day for the duration of the study and follow-up period; - Be willing to avoid unaccustomed physical activity (e.g., starting a new weight lifting routine) for the duration of the study and follow-up period; - Be willing to avoid chiropractic care, ultrasound and physical therapy from screening to Day 9; - Be willing to avoid cold applications and other alternate treatments (e.g. massage, acupuncture etc.) on Day 1 and within 30 minutes prior to scheduled pain assessments on Day 3 and Day 8. Exclusion Criteria: - Has low back pain that is related to, or known to be caused by malignancy, inflammatory disease (rheumatoid arthritis, ankylosing spondylitis, psoriatic arthritis, Reiter's syndrome), osteoporosis, ochronosis, vertebral fracture, infection, juvenile scoliosis, congenital malformation, or fibromyalgia. Note: the presence of radiographic degenerative disc disease is not an exclusion; - Has signs or symptoms consistent with a neurologic, infectious, or fracture-related cause of acute low back pain; - Has chronic low back pain and is experiencing an acute flare-up of the chronic back pain condition; - Has radicular or myelopathic pain; - Has a history of lumbar spine surgery; - Is involved in an active civil lawsuit or workman's compensation claim pertaining to his/her low back pain; - Has symptomatic depression that could interfere with the completion of the questionnaires; - Is mentally or legally incapacitated, has significant emotional problems at the time of the study, or has a history of major psychiatric disorder, including any history of psychosis; - Has a Body Mass Index (BMI) ≥ 40; - Is allergic to, or has a history of a significant clinical or laboratory adverse experience associated with tizanidine, etoricoxib, methocarbamol, meloxicam, or any non-steroidal anti-inflammatory drug (NSAID); - Is allergic to acetaminophen/paracetamol; - Is currently a user (including \"recreational use\") of any illicit drugs, or has a history (within 5 years) of drug or alcohol abuse; - Has participated in another investigational drug study within the last 4 weeks; - Has uncontrolled hypertension; - Has systolic blood pressure (SBP) < 105 or diastolic blood pressure (DBP) < 65; - Has a history of orthostatic hypotension; - Has ischemic heart disease, peripheral arterial disease and/or cerebrovascular disease; - Has a positive human immunodeficiency virus (HIV) test result, hepatitis B surface (HBS) antigen, or hepatitis C virus (HCV) test result; - Has a history of hepatitis/hepatic disease that has been active within the previous year; - Has a history of gastric, biliary, or small intestinal surgery or disease that results in clinical malabsorption; - Has a history of neoplastic disease; - Has any personal or family history of an inherited or acquired bleeding disorder; - Is expected to undergo a planned surgical procedure or invasive diagnostic procedure during the course of the study; - Is pregnant or breast-feeding, or expecting to conceive within the projected duration of the study; - Has an active peptic ulcer or a history of inflammatory bowel disease.

Which medical condition, disease, disorder, syndrome, illness, or injury is researched?

Low Back Pain

Study Interventions

Interventions can include giving participants drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available or noninvasive approaches such as surveys, education, and interviews.

Drug:MK-0663BMK-0663B once daily for 8 days.

Drug:DOLOCAM PLUS®DOLOCAM PLUS® once daily for 8 days.

Drug:Acetaminophen 500 mgAcetaminophen 500 mg up to 4 times daily for up to 8 days as required for uncontrolled breakthrough pain.

Study Arms

Research studies and clinical trials typically have two or more research arms. An arm is a group of people who receive the same treatment in the study.

MK-0663BMK-0663B (etoricoxib 90 mg immediate release [IR]/tizanidine 6 mg modified release [MR]) capsules once daily for 8 days.

DOLOCAM PLUS®DOLOCAM PLUS® (meloxicam 7.5mg/methocarbamol 215mg) capsules once daily for 8 days.

Study Status


Start Date: November 2013

Completed Date: May 2014

Phase: Phase 3

Type: Interventional


Primary Outcome: Number of Participants Experiencing an Adverse Event (AE)

Secondary Outcome: Mean Change From Baseline in the Participant Low Back Pain Questionnaire Score

Study sponsors, principal investigator, and references

Principal Investigator:

Lead Sponsor:


More information:

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