Baby Safety / Compounds / Methocarbamol

Is Methocarbamol safe for babies and kids?

Moderate risk for kids

Infants have immature drug-metabolizing enzymes (CYP450 ontogeny), reduced renal clearance, and different volume of distribution. Accidental exposure or breast milk transfer of Methocarbamol poses heightened risk.

What is methocarbamol?

The IUPAC name is [2-hydroxy-3-(2-methoxyphenoxy)propyl] carbamate.

Also known as: [2-hydroxy-3-(2-methoxyphenoxy)propyl] carbamate, Robaxin, Metocarbamol, Miolaxene.

IUPAC name
[2-hydroxy-3-(2-methoxyphenoxy)propyl] carbamate
CAS number
532-03-6
Molecular formula
C11H15NO5
Molecular weight
241.24 g/mol
SMILES
COC1=CC=CC=C1OCC(COC(=O)N)O
PubChem CID
4107

Risk for babies

Moderate risk

Infants have immature drug-metabolizing enzymes (CYP450 ontogeny), reduced renal clearance, and different volume of distribution. Accidental exposure or breast milk transfer of Methocarbamol poses heightened risk.

Neonates and infants up to 12 months have incomplete blood-brain barrier development, immature Phase I/II metabolic enzymes (particularly CYP3A4, UGT1A1), and higher gastrointestinal permeability. Equivalent doses produce higher internal concentrations and longer residence times.

What to do: Minimize infant exposure through source control. For breastfeeding mothers: reduce maternal exposure. For formula-fed infants: use certified low-migration bottles and verified water sources. Consult pediatrician regarding any concerns.

Risk for pregnant and nursing people

Elevated risk

Methocarbamol poses pregnancy risk through potential teratogenicity, altered pharmacokinetics (increased blood volume, changed CYP activity), and placental transfer. FDA pregnancy category should be evaluated.

Suspected reproductive toxicant (GHS H361) or suspected endocrine disruptor. Precautionary approach warranted. Animal studies or limited human data suggest developmental toxicity potential.

What to do: Minimize exposure during pregnancy and lactation. Consult healthcare provider regarding specific risks. Consider alternative products with lower hazard profiles.

Regulatory consensus

1 regulatory bodyhas classified Methocarbamol.

AgencyYearClassificationNotes
US FDA (approved drug; non-scheduled; veterinary NADA)2021no carcinogenicity classification; FDA-approved muscle relaxant (Robaxin) and veterinary drug (Robaxin-V for dogs/horses); not a DEA controlled substance; not classified for carcinogenicity by NTP, IARC, or EFSA

Regulators apply different standards of evidence — animal-data weighting, exposure-pattern assumptions, epidemiological power thresholds — which is why two scientific bodies can review the same data and reach different conclusions. The disagreement is the data.

Where kids encounter methocarbamol

  • Industrial Facilities — Manufacturing plants, Chemical storage areas, Waste treatment sites
  • Occupational Environments — Factories, Warehouses, Transportation vehicles

Safer alternatives

Lower-risk approaches that achieve a similar outcome to Methocarbamol:

  • Alternative drug class; Non-pharmacological therapy; Lowest effective dose
    Trade-offs: Direct chemical substitution requires verification that the replacement does not introduce new hazards (regrettable substitution). Conduct full hazard assessment of proposed alternative before adoption.
    Relative cost: 1.2-2×

Frequently asked questions

Is methocarbamol safe for kids?

Infants have immature drug-metabolizing enzymes (CYP450 ontogeny), reduced renal clearance, and different volume of distribution. Accidental exposure or breast milk transfer of Methocarbamol poses heightened risk.

What products contain methocarbamol?

Methocarbamol appears in: Manufacturing plants (Industrial facilities); Chemical storage areas (Industrial facilities); Factories (Occupational environments); Warehouses (Occupational environments).

What should I do if my child is exposed to methocarbamol?

Minimize infant exposure through source control. For breastfeeding mothers: reduce maternal exposure. For formula-fed infants: use certified low-migration bottles and verified water sources. Consult pediatrician regarding any concerns.

See Methocarbamol in the baby app

Look up products containing methocarbamol, compare to alternatives, and explore the full data record.

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Sources (1)
  1. FDA Methocarbamol Robaxin Prescribing Information 2021: Not Controlled Substance; Guaifenesin Carbamate Ester; Not TCA No Anticholinergic; Robaxin-V NADA Dogs Horses Tetanus 44–220 mg/kg IV; Pediatric Tetanus Use; No Carcinogenicity Classification (2021) — regulatory

Reference data, not professional advice. Aggregates publicly available regulatory and scientific data; not a substitute for veterinary, medical, legal, or regulatory advice. Why we built ALETHEIA →