Management of Low Back and Leg Spasms

First-Line Treatment Options

The American College of Physicians recommends NSAIDs as first-line pharmacological treatment for acute low back pain before considering muscle relaxants 2, 3
Acetaminophen is a reasonable alternative first-line option with a more favorable safety profile than NSAIDs, though slightly less effective for pain relief 2
If pain is not adequately controlled with NSAIDs or acetaminophen, or if muscle spasm is a prominent feature, adding a muscle relaxant is appropriate 2, 4

The American College of Physicians recommends Tizanidine as the preferred muscle relaxant for low back pain and leg spasms, particularly for lumbar radiculopathy 1, 5
Baclofen has limited evidence supporting its use for low back pain despite its efficacy in spasticity of spinal origin 5

For low back pain with radiculopathy (leg symptoms), consider combining Tizanidine (2-4mg, titrate as needed) as the preferred muscle relaxant 1
Gabapentin can be used as adjunctive therapy, which has demonstrated small, short-term benefits specifically in patients with radiculopathy 4, 1

All skeletal muscle relaxants are associated with central nervous system adverse effects, primarily sedation 2, 4
Time-limited courses (e.g., 1-2 weeks) of muscle relaxants are recommended due to limited evidence on long-term benefits and risks 3, 1
Tizanidine requires monitoring for hepatotoxicity, which is generally reversible 2, 1

For acute low back pain, limit muscle relaxant use to the shortest period necessary (typically 1-2 weeks) 3, 1
Reassess after a short course and consider alternative therapies if no improvement is seen 1