Muscle Relaxants Have Limited Benefit for Your Condition and Are Not Recommended for Leg Pain
A muscle relaxant may provide short-term relief (2-4 weeks) for acute neck or back pain from muscle spasm, but will NOT help with radiating leg pain from a pinched nerve or bulging disc, and has no role in treating bursitis. The worsening leg pain suggests nerve root compression (radiculopathy), which requires different treatment.
Why Muscle Relaxants Won't Help Your Leg Pain
Your radiating leg pain indicates nerve root involvement (radiculopathy from the bulging disc or pinched nerve), not muscle spasm. Muscle relaxants only work on muscle-related pain, not nerve pain 1.
For radiculopathy with leg pain, the evidence supports:
- Gabapentin as first-line for nerve pain (small to moderate short-term benefits) 1
- NSAIDs for inflammatory pain relief 1
- Tricyclic antidepressants for chronic nerve pain 1
When Muscle Relaxants Might Help (Limited Scenarios)
Muscle relaxants are only effective for:
- Acute low back or neck pain (less than 4 weeks duration) from muscle spasm 1, 2, 3
- Short-term use only (2-4 weeks maximum) 1, 2, 4
- Pain relief is moderate at best - they reduce pain by about 20 points on a 100-point scale 2
The 2024 systematic review found muscle relaxants showed benefit for neck pain and painful cramps, but NOT for low back pain or fibromyalgia with long-term use 3.
Critical Limitations and Risks
Common side effects occur in 50% of patients 1, 2:
- Sedation and drowsiness (most common)
- Dizziness
- Dry mouth
- Risk is 2-fold higher for central nervous system effects compared to placebo 4, 5
Specific drug concerns 1:
- Carisoprodol: Metabolized to meprobamate (abuse potential)
- Dantrolene: Black box warning for potentially fatal liver toxicity
- Tizanidine/chlorzoxazone: Reversible liver toxicity
The 2020 geriatrics guideline explicitly states these drugs "do not directly relax skeletal muscle and have no evidence of efficacy in chronic pain" 6.
What You Actually Need
Given your worsening leg pain (a red flag for progressive nerve compression):
- Immediate assessment needed - worsening radiculopathy may require urgent intervention
- Check for motor weakness - test ability to walk on heels/toes, squat strength
- Assess for cauda equina symptoms - bowel/bladder dysfunction requires emergency surgery
Appropriate medication options:
- Gabapentin 300-900mg daily (titrate up) for nerve pain 1
- NSAIDs (ibuprofen 400-600mg TID or naproxen 500mg BID) for inflammation 1
- Acetaminophen 1000mg QID can be added but has minimal benefit 7
Non-medication treatments are more important:
- Physical therapy and structured exercise (after acute phase)
- Epidural steroid injection if conservative treatment fails after 6 weeks
- Surgical evaluation if progressive weakness or symptoms persist beyond 6-12 weeks 1
Bottom Line
Do not expect a muscle relaxant to help your leg pain. The bulging disc causing nerve compression requires nerve-targeted treatment (gabapentin) and anti-inflammatory medication (NSAIDs), not muscle relaxants. If you're already taking a muscle relaxant without benefit after 2 weeks, it should be discontinued 1, 3. The worsening leg pain warrants reassessment - you may need imaging (MRI) if not already done, and potentially interventional treatment or surgical consultation if conservative measures fail.