Methocarbamol
Prescription ·Exploratory record · not publication-reviewed ·Updated July 13, 2026
A centrally acting skeletal muscle relaxant used as an adjunct to rest, physical therapy, and other measures for the relief of discomfort associated with acute, painful musculoskeletal conditions. Methocarbamol is generally better tolerated than cyclobenzaprine with less sedation and is also available in IV/IM formulations.
Exploratory record, not a reviewed medical publication.
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This generated database record has not completed a claim-level review by a qualified human medical reviewer. Bibliography links and evidence labels are not approval. The page remains available for reference and is excluded from search indexing.
What the research says.
A quick, data-only summary. The full evidence, dosing, and sources are below.
A centrally acting skeletal muscle relaxant used as an adjunct to rest, physical therapy, and other measures for the relief of discomfort associated with acute, painful musculoskeletal conditions. NutriStack rates the supporting evidence as moderate. Common adult dosing is 1500 mg four times daily initially, then 750–1000 mg three to four times daily for maintenance (as prescribed by your physician), though a prescriber sets the actual dose. This profile indexes 10 sources.
The bottom line
Evidence rating moderate. Most-documented uses: relief of acute musculoskeletal pain and spasm, generally less sedating than cyclobenzaprine, available in iv/im formulation for acute use. 10 sources indexed (2015–2021), with 0 interaction records on file.
How it works, mechanistically.
Core mechanism
The exact mechanism of action is not fully established. Methocarbamol is thought to exert its muscle-relaxant effects through general CNS depression rather than direct action on skeletal muscle, the neuromuscular junction, or the motor nerve. It may inhibit polysynaptic reflexes and has sedative properties that contribute to its clinical effect.1,2
Dosing & protocol.
Can be taken with or without food; may discolor urine to brown, black, or green (harmless)
Full safety detail.
Side effects
- Drowsiness and dizziness
- Lightheadedness
- Nausea
- Blurred vision
- Headache
- Urine discoloration (brown, black, or green, harmless)
Sources, by evidence tier.
Numbered references. Citations throughout the page link here.
Randomized controlled trials
5- 1Efficacy of the Combination of Indomethacin and Methocarbamol versus Indomethacin Alone in Patients with Acute Low Back Pain: A Double-Blind, Randomized Placebo-Controlled Clinical TrialPMIDSamsamshariat S, Sharifi-Sade M, Zoofaghari S et al. · Journal of research in pharmacy practice · 2021
Samsamshariat S, Sharifi-Sade M, Zoofaghari S et al.. Efficacy of the Combination of Indomethacin and Methocarbamol versus Indomethacin Alone in Patients with Acute Low Back Pain: A Double-Blind, Randomized Placebo-Controlled Clinical Trial. Journal of research in pharmacy practice. 2021
- 2Randomized-controlled trial of methocarbamol as a novel treatment for muscle cramps in cirrhotic patientsPMIDAbd-Elsalam S, Arafa M, Elkadeem M et al. · European journal of gastroenterology & hepatology · 2019
Abd-Elsalam S, Arafa M, Elkadeem M et al.. Randomized-controlled trial of methocarbamol as a novel treatment for muscle cramps in cirrhotic patients. European journal of gastroenterology & hepatology. 2019
- 3A Randomized, Double-Blind, Placebo-Controlled Trial of Naproxen With or Without Orphenadrine or Methocarbamol for Acute Low Back PainPMIDFriedman BW, Cisewski D, Irizarry E et al. · Annals of emergency medicine · 2018
Friedman BW, Cisewski D, Irizarry E et al.. A Randomized, Double-Blind, Placebo-Controlled Trial of Naproxen With or Without Orphenadrine or Methocarbamol for Acute Low Back Pain. Annals of emergency medicine. 2018
- 4Comparison of atracurium and methocarbamol for preventing succinylcholine-induced muscle fasciculation: A randomized controlled trialPMIDShabanian G, Shabanian M, Shabanian A et al. · Journal of advanced pharmaceutical technology & research · 2017
Shabanian G, Shabanian M, Shabanian A et al.. Comparison of atracurium and methocarbamol for preventing succinylcholine-induced muscle fasciculation: A randomized controlled trial. Journal of advanced pharmaceutical technology & research. 2017
- 5[Methocarbamol in acute low back pain. A randomized double-blind controlled study]PMIDEmrich OM, Milachowski KA, Strohmeier M · MMW Fortschritte der Medizin · 2015
Emrich OM, Milachowski KA, Strohmeier M. [Methocarbamol in acute low back pain. A randomized double-blind controlled study]. MMW Fortschritte der Medizin. 2015
Reference material
5- 6See S, Ginzburg R. Choosing a skeletal muscle relaxant. Am Fam Physician. 2008.Source linkedPMID
- 7Chou R et al. Nonpharmacologic therapies for low back pain: a systematic review for an American College of Physicians Clinical Practice Guideline. Ann Intern Med. 2017.Source linkedPMID
- 8Roberts AT et al. Management of Muscle Cramps in Patients With Cirrhosis: A Systematic Review of Randomised Controlled Trials. Aliment Pharmacol Ther. 2025.Source linkedPMID
- 9Chan E, Waggoner C, Boylan PM. Commentary: Is Polyethylene Glycol Toxicity From Intravenous Methocarbamol Fact or Fiction?. Journal of pain & palliative care pharmacotherapy. 2024Source linkedPMID
- 10Barzani HAH, Omer RA, Abdulrahman NB et al.. Evolving Analytical Methods for the Quantification of Methocarbamol: A Critical Review. Biomedical chromatography : BMC. 2026Source linkedPMID
Common questions.
Quick answers about Methocarbamol, drawn from the data on this page.
What is Methocarbamol?
A centrally acting skeletal muscle relaxant used as an adjunct to rest, physical therapy, and other measures for the relief of discomfort associated with acute, painful musculoskeletal conditions. Methocarbamol is generally better tolerated than cyclobenzaprine with less sedation and is also available in IV/IM formulations.
What is Methocarbamol used for?
Commonly cited benefits of Methocarbamol include: Relief of acute musculoskeletal pain and spasm; Generally less sedating than cyclobenzaprine; Available in IV/IM formulation for acute use; Adjunct to rest and physical therapy. NutriStack rates the overall evidence as moderate.
What is a typical dose of Methocarbamol?
A typical adult dose of Methocarbamol is 1500 mg four times daily initially, then 750–1000 mg three to four times daily for maintenance (as prescribed by your physician). The commonly recommended form is Tablet or IV/IM injection. These are general ranges, not personalized advice; confirm the right dose with a clinician.
What are the side effects of Methocarbamol?
Reported side effects include drowsiness and dizziness, lightheadedness, nausea, blurred vision, headache, urine discoloration (brown, black, or green, harmless). This is educational information; check with a healthcare professional before use.
How strong is the evidence for Methocarbamol?
NutriStack rates this as Moderate, meaning several aligned RCTs or one large RCT plus supporting reviews. Full tier criteria are at https://nutristackapp.com/methodology/evidence-tiers.
Use this with your stack
Methocarbamol in NutriStack.
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