Treatment of Acute Low Back Pain

Initial Management Approach

The American College of Physicians recommends NSAIDs as the preferred first-line medication for acute low back pain, providing small to moderate improvements in pain intensity compared to placebo 1.
Acetaminophen can be considered as an alternative first-line option due to its favorable safety profile, though it shows no significant difference from placebo for pain intensity or function in acute low back pain 1.
NSAIDs should be prescribed at the lowest effective doses for the shortest periods necessary, with assessment of cardiovascular and gastrointestinal risk factors before prescribing 2.
Most head-to-head trials show no differences between different NSAIDs, so selection can be based on cost, availability, and individual patient factors 1.

Patients should be advised to remain active and avoid bed rest, as activity restriction merely prolongs recovery and delays resumption of normal activities 3, 4, 5, 7.
Application of superficial heat via heating pads or heated blankets provides short-term symptomatic relief 4, 5, 7.

Skeletal muscle relaxants improve short-term pain relief compared to placebo after 2 to 4 and 5 to 7 days in acute low back pain 1.
All skeletal muscle relaxants are associated with central nervous system adverse effects, primarily sedation 2.
No compelling evidence exists that different skeletal muscle relaxants differ in efficacy or safety, though individual agents carry unique risks 2, 6.

For patients who do not improve with self-care options, spinal manipulation administered by appropriately trained providers is associated with small to moderate short-term benefits for acute low back pain 4, 5, 7.

Opioid analgesics or tramadol may be considered only when severe, disabling pain is not controlled with acetaminophen and NSAIDs 2.
Substantial risks include aberrant drug-related behaviors, abuse potential, and addiction, requiring careful weighing of benefits and harms before initiating therapy 2.

Systemic corticosteroids are not recommended for acute low back pain with or without sciatica, as they have not been shown more effective than placebo 1, 6, 7.
Benzodiazepines show similar effectiveness to skeletal muscle relaxants but carry risks for abuse, addiction, and tolerance; if used, only prescribe time-limited courses 4, 5.
Insufficient evidence exists to recommend antidepressants or antiseizure medications for acute low back pain 1.

Do not prescribe bed rest or activity restriction, as this provides no benefit and delays recovery 4, 7.
Do not use extended courses of medications without clear evidence of continued benefits and absence of major adverse events 4, 7.
Monitor for hepatotoxicity when using acetaminophen at maximum doses, especially in elderly patients or those with hepatic impairment 3.