Cyclobenzaprine Efficacy and Safety for Acute Skeletal Muscle Spasms

Efficacy Considerations

• Skeletal muscle relaxants, including cyclobenzaprine, have been found to be moderately superior to placebo for short-term (2-4 days) pain relief in acute low back pain, according to the American College of Physicians, with a strength of evidence rated as moderate 1, 2, 3

Safety and Adverse Effects

• Central nervous system adverse events are more common with skeletal muscle relaxants compared to placebo (RR 2.04), as reported by the American College of Physicians, with a strength of evidence rated as high 1, 2, 3
• When discontinuing cyclobenzaprine after prolonged use, a gradual taper over 2-3 weeks is recommended to prevent withdrawal symptoms, as suggested by the American Academy of Family Physicians 4

Special Populations

• The American Geriatrics Society identifies cyclobenzaprine as potentially inappropriate for older adults due to anticholinergic effects and sedation, with a strength of evidence rated as strong 4