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Methocarbamol concentration in serum/plasma

Published: August 9, 2026Updated: August 16, 2026

This test measures the amount of methocarbamol, a muscle relaxant medication, in your blood.

Quick summary

["Knowing your methocarbamol level helps your doctor monitor your dose and ensure it’s working safely."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
73284-2
Short code
Methocarbamol ind plt IgM SerPl Ql FC
Synonyms
Methocarbamol ind plt IgM SerPl Ql FC
Category
hematology
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
flow-cytometry
CPT
82784
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your doctor may order this test if you’re taking methocarbamol to manage muscle spasms or pain. It helps assess whether your medication level is within a safe range or if adjustments are needed.

What to Expect Before the Test

No special preparation is needed. A blood sample will be taken from a vein, usually in your arm. You may feel a slight pinch, but it’s quick and painless.

What the Results Mean

Results help determine if your dose is appropriate. Too high or too low levels can affect how well the medication works or cause side effects. Your doctor will discuss these findings with you.

Common Reasons for Testing

This test is often used to check for therapeutic drug levels, especially if you’re on long-term treatment or experiencing symptoms like dizziness, confusion, or muscle weakness.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: Monitoring Methocarbamol Levels

Short name

Methocarbamol Level

Frequently asked questions

How often should I get this test?
Your doctor will decide based on your treatment plan, how long you’ve been taking methocarbamol, and whether you’re experiencing any side effects. Regular monitoring may be needed if you’re on a high dose or have kidney issues.
What are typical side effects of methocarbamol?
Common side effects include drowsiness, dizziness, nausea, or blurred vision. If you notice severe symptoms like difficulty breathing, irregular heartbeat, or extreme drowsiness, contact your doctor immediately.
Can diet or other medications affect this test?
While methocarbamol itself doesn’t interact with food, other medications (like alcohol or muscle relaxants) may affect its levels. Always inform your doctor about all medications, supplements, or alcohol consumption before testing.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy