Skelaxin vs. Baclofen

See how Skelaxin and Baclofen compare on approved uses, dosing, side effects, and cost.

Key Takeaways

  • Skelaxin treats acute musculoskeletal pain while baclofen treats spasticity from multiple sclerosis or spinal cord conditions, so the two drugs are prescribed for different problems despite both being called muscle relaxants.

  • Baclofen requires a gradual dose increase over about nine days and should never be stopped abruptly, while Skelaxin is started at its full working dose from day one.

  • Baclofen typically costs far less out of pocket than Skelaxin, but it carries a serious withdrawal risk that metaxalone does not.

Skelaxin vs. Baclofen Drug Summary

Skelaxin

Skelaxin (metaxalone) is a skeletal muscle relaxant used alongside rest and physical therapy for acute, painful musculoskeletal conditions. It's an oral tablet, usually dosed at 800 mg three to four times a day, and absorbs better when taken with a high-fat meal. It carries no boxed warning and is approved for adults and adolescents 13 and older.

Baclofen

Baclofen is a GABA-B receptor agonist used to treat spasticity from multiple sclerosis, spinal cord injury, or other spinal cord disease. It comes as a tablet, solution, or granules, starting at a low dose and stepping up over about nine days to a maintenance dose. Severe, treatment-resistant spasticity can also be managed with an intrathecal pump delivered directly into the spinal fluid.

Skelaxin vs. Baclofen Side Effects

Skelaxin

Most common
Drowsiness
Dizziness
Headache
Nervousness/irritability

Baclofen

Most common
Drowsiness (up to 63%)
Dizziness (up to 15%)
Weakness (up to 15%)
Nausea (4 to 12%)

Skelaxin vs. Baclofen Dosage

Skelaxin

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 800 mg 3-4 times daily At the start
Maximum dose 800 mg 3-4 times daily Same as starting
Dose changes None Fixed dose

Baclofen

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 5 mg three times daily Days 1-3
Maximum dose 20 mg three times daily Day 10 onward
Dose changes 3 increases Every 3 days

Skelaxin vs. Baclofen Indications

Skelaxin

Skelaxin is FDA-approved as an adjunct to rest and physical therapy for acute, painful musculoskeletal conditions in adults and adolescents 13 and older. It's meant for short-term relief of muscle spasm and discomfort rather than ongoing spasticity management. It's not approved for children 12 and under.

  • Acute, painful musculoskeletal conditions

  • Used with rest and physical therapy

  • Approved for adults and ages 13 and up

  • Not approved for children 12 and under

Baclofen

Baclofen is FDA-approved to reduce spasticity caused by multiple sclerosis, spinal cord injury, or other spinal cord disease, and severe cases can be treated with an intrathecal pump. It's also used off-label for alcohol cravings, hiccups, and GERD, though those uses aren't FDA-approved. It hasn't been shown effective for spasticity from stroke, cerebral palsy, or Parkinson's disease.

  • Spasticity from multiple sclerosis

  • Spasticity from spinal cord injury or disease

  • Severe spasticity via intrathecal pump

  • Off-label: alcohol cravings, hiccups, GERD

Skelaxin vs. Baclofen Pros and Cons

Skelaxin

Skelaxin has no boxed warning and doesn't require a titration schedule, so treatment starts at the full working dose right away. It's contraindicated in severe kidney or liver impairment, and absorption depends on taking it with a high-fat meal.

Pros

  • No boxed warning

  • No titration needed, starts at full dose

  • Lower risk of dangerous withdrawal on stopping

Cons

  • Higher list price than baclofen

  • Absorption depends on a high-fat meal

  • Contraindicated in severe renal or hepatic impairment

  • Not approved for children 12 and under

Baclofen

Baclofen has decades of clinical use, comes in several forms including tablets, solution, and an intrathecal pump, and costs much less out of pocket than Skelaxin. It requires a step-up dosing schedule and must be tapered carefully, since stopping suddenly can trigger seizures or rebound spasticity.

Pros

  • Much lower list price than Skelaxin

  • Multiple formulations for flexible dosing

  • Long track record of use since 1977

Cons

  • Abrupt stopping can cause dangerous withdrawal

  • Requires gradual titration over 9+ days

  • Not proven effective for stroke or CP spasticity

  • Needs dose adjustment in renal impairment

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