Diazepam Use With Standard Management for Acute Low Back Pain

Phase 2

Completed

Conditions: Low Back Pain

Interventions: Drug: Naproxen
Drug: Placebo
Drug: Diazepam

Registration Number: NCT02646124

Lead Sponsor: Montefiore Medical Center

Brief Summary: Given the poor pain and functional outcomes that persist beyond an Emergency Department (ED) visit for musculoskeletal low back pain (LBP), we propose a clinical trial to evaluate whether combining a benzodiazepine with an NSAID is more effective than nonsteroidal antiinflammatory drug (NSAID) monotherapy for the treatment of acute, non-traumatic, non-radicular low back pain.

Detailed Description: Low back pain (LBP) causes 2.4% of visits to US emergency departments (ED) resulting in 2.7 million visits annually. In general, outcomes for these patients are poor. One week after ED discharge, 70% of patients report persistent back-pain related functional impairment and 69% report analgesic use within the previous 24 hours. Three months after the ED visit, 48% of these patients report functional impairment, 42% report moderate or severe pain, and 46% report persistent analgesic use.

It is not clear how acute LBP should be treated. Non-steroidal anti-inflammatory drugs (NSAID) are guideline-supported, first line therapy for acute LBP. NSAIDs are more efficacious than placebo with regard to pain relief, global improvement, and requirement of analgesic medication but are not sufficient therapy for as many as ½ of ED patients, who continue to suffer despite therapy with NSAIDs. Treatment of LBP with multiple concurrent medications is common in the ED--emergency physicians often prescribe benzodiazepines, skeletal muscle relaxants, or opioids in combination with NSAIDs. However, work recently completed here at Montefiore has revealed that combining skeletal muscle relaxants or opioids with NSAIDs does not improve outcomes. It remains uncertain if adding benzodiazepines to NSAIDs improves LBP outcomes.

Although benzodiazepines are used in 300,000 US ED visits for LBP annually, scant evidence exists to determine the appropriateness of this approach. Efficacy of benzodiazepines may be related to direct or centrally-mediated action on skeletal muscle or may instead work by mitigating anxiety about the condition or numbing a patient to the pain.

Given the poor pain and functional outcomes that persist beyond an ED visit for musculoskeletal LBP, we propose a clinical trial to evaluate whether combining a benzodiazepine with an NSAID is more effective than NSAID monotherapy for the treatment of acute, non-traumatic, non-radicular low back pain. Specifically, we will evaluate the following hypothesis:

A daily regimen of naproxen + diazepam will provide greater relief of LBP than naproxen + placebo one week after an ED visit, as measured by the Roland Morris Disability Questionnaire.

Recruitment & Eligibility

Status: COMPLETED

Sex: All

Target Recruitment: 114

Inclusion Criteria

Present to ED primary for management of LBP, defined as pain originating between the lower border of the scapulae and the upper gluteal folds. Flank pain, that is pain originating from tissues lateral to the paraspinal muscles, will not be included.
Absence of non-musculoskeletal etiology of low back, such as urinary tract infection, cystic ovarian disease, or influenza like illness. The primary clinical diagnosis, at the conclusion of the ED visit, must be a diagnosis consistent with non-traumatic, non-radicular, musculoskeletal LBP.
Patient is to be discharged home. Patients admitted to the hospital are more likely to be treated with parenteral medication and therefore are not appropriate for this study.
Age 21-69 Enrollment will be limited to adults younger than 70 years because of the increased risk of adverse medication effects in the elderly.
Non-radicular pain: pain cannot radiate below the gluteal folds in a radicular pattern. Patients with non-radicular pain extending below the gluteal folds will not be excluded
Pain duration <2 weeks (336 hours). Patients with more than two weeks of pain are at increased risk of poor pain and functional outcomes.(2)
Prior to the acute attack of LBP, back pain cannot have occurred once per month or more frequently. Patients with more frequent back pain are at increased risk of poor pain and functional outcomes.(2)
Non-traumatic LBP: no substantial and direct trauma to the back within the previous month
Functionally impairing back pain: A baseline score of > 5 on the Roland-Morris Disability Questionnaire

Exclusion Criteria

-Not available for follow-up
Pregnant or breast-feeding
Chronic pain syndrome defined as use of any analgesic medication on a daily or near-daily basis
Allergic to or intolerant of investigational medications
Contra-indications to non-steroidal anti-inflammatory drugs: peptic ulcer disease, history of gastro-intestinal bleeding, congestive heart failure, advanced renal disease, aspirin sensitive asthma
Contra-indications to diazepam: glaucoma, myasthenia gravis, cirrhosis, sleep apnea, history of alcoholism or substance abuse

Study & Design

Study Type: INTERVENTIONAL

Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Diazepam	Naproxen	Naproxen +Diazepam
Placebo	Placebo	Naproxen + Placebo
Diazepam	Diazepam	Naproxen +Diazepam
Placebo	Naproxen	Naproxen + Placebo

Primary Outcome Measures

Name	Time	Method
Change in Functional Impairment as Measured by the Roland Morris Disability Questionnaire	Between baseline and one week after emergency department discharge	The Roland Morris Disability Questionnaire (RMDQ) is a 24 item instrument that evaluates the impact of low back pain on one's daily life. It is most sensitive for patients with mild to moderate disability due to acute, sub-acute or chronic low back pain. Each question can be answered as either a "yes" or "no". The score ranges from 0 to 24 where a higher score reflects greater impairment and, therefore, worsening in the quality of life. The change in RMDQ is obtained by subtracting the RMDQ score at one week after discharge from the baseline score.

Secondary Outcome Measures

Name	Time	Method
Number of Participants With Moderate or Severe Pain, as Measured on an Ordinal Scale	1 week after discharge from emergency department	Patients with moderate or serve pain. Worst Lower Back Pain (LBP) over the previous 24 hours, using a four point ordinal scale: severe, moderate, mild, or none.
Number of Participants Who Required Analgesic Medication for Low Back Pain Within the Previous 24 Hours	One week after discharge from the emergency department	Telephone questionnaire is used to assess patients needing any analgesic or low back pain medication within the previous 24 hours.
Number of Participants Who Required Analgesic Medication for Low Back Pain Within the Previous 72 Hours	Assessed three months after emergency department discharge	Patients needing any analgesic or LBP medication within the previous 72 hours
Participants Satisfied With Treatment	1 week	Participants who answered "Yes" when asked the question "Do you want to receive the same combination of medications during a subsequent visit to the ER?"