Robaxin vs. Skelaxin

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

Key Takeaways

  • Robaxin and Skelaxin are both prescription muscle relaxants used short-term for acute musculoskeletal pain alongside rest and physical therapy.

  • Robaxin requires a multi-day titration and comes in oral and injectable forms, while Skelaxin uses one flat dose with no titration needed.

  • Robaxin typically costs less per month than Skelaxin, which also needs to be taken with a high-fat meal for full absorption.

Robaxin vs. Skelaxin Drug Summary

Robaxin

Robaxin (methocarbamol) is a centrally-acting carbamate muscle relaxant used as an adjunct to rest and physical therapy for acute musculoskeletal pain. It starts with a higher oral dose for the first few days, then tapers down, and it also comes in an injectable form used in hospitals, including for tetanus.

Skelaxin

Skelaxin (metaxalone) is a skeletal muscle relaxant also used alongside rest and physical therapy for acute musculoskeletal pain. It is taken as a flat oral dose three to four times a day with no titration needed, and absorption increases significantly when it is taken with a high-fat meal.

Robaxin vs. Skelaxin Side Effects

Robaxin

Most common
Drowsiness (rate not specified in labeling)
Headache (rate not specified in labeling)
Dizziness or lightheadedness (rate not specified in labeling)
Nausea (rate not specified in labeling)

Skelaxin

Most common
Drowsiness (rate not specified in labeling)
Headache (rate not specified in labeling)
Dizziness (rate not specified in labeling)
Nervousness or irritability (rate not specified in labeling)

Robaxin vs. Skelaxin Dosage

Robaxin

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 1500 mg four times daily Days 1-3
Maximum dose 1000 mg IM/IV per dose If needed
Dose changes 2 increases Every 3 days

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

Robaxin vs. Skelaxin Indications

Robaxin

Robaxin is FDA-approved to relieve discomfort from acute, painful musculoskeletal conditions when used with rest and physical therapy. Its injectable form is also approved as adjunctive therapy in tetanus management. It is approved for adults and adolescents 16 and older.

  • Acute musculoskeletal pain relief (adjunct therapy)

  • Adjunctive treatment for tetanus (injectable form)

  • Approved for ages 16 and older

  • Available in oral tablet and IV/IM injection

Skelaxin

Skelaxin is FDA-approved to relieve discomfort from acute, painful musculoskeletal conditions when used with rest and physical therapy. It is approved for adults and adolescents 13 and older, a slightly younger age range than Robaxin. It is available only as an oral tablet.

  • Acute musculoskeletal pain relief (adjunct therapy)

  • Approved for ages 13 and older

  • Oral tablet form only

  • Not approved for children 12 and under

Robaxin vs. Skelaxin Pros and Cons

Robaxin

Robaxin has been used since 1957 and is not a federally controlled substance, unlike some other muscle relaxants. It offers both oral and injectable options, giving flexibility for more severe or hospital cases. Its titration schedule means dosing changes over the first several days of treatment.

Pros

  • Not a federally controlled substance

  • Available as IV/IM injection for severe or hospital cases

  • Lower typical monthly cost, roughly $27 to $81 versus $110 to $265 for Skelaxin

Cons

  • Requires a multi-day titration schedule with frequent daily dosing

  • Injectable form can cause tissue or vascular injury if given incorrectly

  • Not approved for children under 16

  • CNS side effects can be intensified by alcohol or other depressants

Skelaxin

Skelaxin uses one consistent dose without a titration period, which can simplify starting treatment. It is approved for a slightly younger age group than Robaxin, down to age 13. It is only available as an oral tablet, with no injectable option for acute care settings.

Pros

  • No titration schedule; simple dosing from day one

  • Approved for adolescents as young as 13

  • Uses a single 800 mg tablet strength, avoiding titration mix-ups

Cons

  • Higher typical monthly cost, roughly $110 to $265 versus $27 to $81 for Robaxin

  • Absorption depends on taking it with a high-fat meal

  • Risk of serotonin syndrome with other serotonergic drugs

  • Contraindicated in severe renal or hepatic impairment and certain anemias

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