Methocarbamol (Robaxin): Uses, Side Effects, & Misuse

How long does methocarbamol stay in your system

Updated December 6, 2024

Authored By:

Joe Gilmore

Edited By

Amy Leifeste

Medically Reviewed By

Javier Rodriguez-Winter

Authored By:

Joe Gilmore

Edited By

Amy Leifeste

Medically Reviewed By

Javier Rodriguez-Winter

How long does methocarbamol stay in your system

Methocarbamol (Robaxin): Uses, Side Effects, & Misuse

Robaxin is a branded form of methocarbamol, a muscle relaxant prescribed to relieve discomfort from muscle injury. The medication is safe when used as directed but may be abused, leading to an array of short-term and long-term effects.

This guide to methocarbamol shows you how to avoid the risks associated with this medication. It also addresses questions like “What is Robaxin” and “What does methocarbamol do.” Also, you will learn how to connect with compassionate and effective care.

What Is Methocarbamol?

Methocarbamol is a muscle relaxant used to relieve pain and discomfort from strains, sprains, or other muscle injuries. It works by slowing down activity in the nervous system, allowing the muscles to relax. This medication is often prescribed for people experiencing muscle spasms and pain.

There are two types of muscle relaxers: antispasmodic [1] and antispastics [2]. Methocarbamol is an antispasmodic, which means it helps reduce muscle spasms by affecting the central nervous system. While methocarbamol is effective when used as directed, it can be misused. Some people take higher doses than prescribed, use it without a prescription, or take it for unintended purposes, which can lead to negative side effects.

Methocarbamol can be abused in various ways, such as taking larger doses or mixing it with other substances like alcohol. Misuse can result in harmful effects, making it essential to use this medication exactly as prescribed by a doctor.

What Is Robaxin?

Robaxin is another name for methocarbamol. The Robaxin muscle relaxer has FDA approval [3] as a solution (manufactured by HIKMA) and a tablet (manufactured by Endo). Robaxin generic form is available as methocarbamol.

What Does Methocarbamol Do?

Methocarbamol helps relax muscles and relieve pain by acting as a central nervous system depressant. By slowing down the activity in the nervous system, it helps reduce muscle spasms, tension, and pain. This can make it easier for patients to move and perform daily activities without discomfort.

What Is Methocarbamol Used For?

What is Robaxin used for, then? Methocarbamol uses are mainly treating muscle spasms and pain. The medication is often prescribed in combination with physical therapy for people who are struggling with muscle pain due to injuries or chronic conditions.

Off-label Robaxin uses include:

  • Back pain
  • Fibromyalgia
  • Inflammatory arthritis
  • Abdominal muscle cramps

However, some side effects of methocarbamol – drowsiness and dizziness, for instance – can make it feel like a high when abused. Use this medication only as directed by a healthcare professional to avoid these negative effects.

Methocarbamol Dosage

The amount of methocarbamol you need can vary for each person. Follow your doctor’s instructions or the directions on the medication label. The doses listed below are typical, but your doctor might adjust your dose to better suit your needs. Never change your dose unless your doctor tells you to.

For relaxing stiff muscles:

  • Adults: Usually start with three methocarbamol 500mg tablets or two methocarbamol 750mg tablets (total dose of 1500mg methocarbamol) taken four times a day. Your doctor might adjust this dose if needed.
  • Children: The dose will be decided by your doctor.

The amount you take depends on the strength of the medicine. The number of doses per day, the time between doses, and how long you take the medicine depend on the condition being treated. Always follow your doctor’s instructions carefully.

Methocarbamol Brand Name

Methocarbamol is the generic name for a muscle relaxer also available in branded forms like Robaxin.

Methocarbamol Side Effects

Methocarbamol can help relieve muscle pain and stiffness, but some people experience Robaxin side effects. It’s important to know what to expect and when to talk to your doctor.

Short-Term

Short-term side effects usually happen soon after you start taking methocarbamol. They can include:

  • Drowsiness
  • Dizziness
  • Nausea
  • Headache
  • Blurred vision

These side effects often go away as your body gets used to the medication. If they bother you or don’t go away, let your doctor know.

Long-Term

Long-term side effects can happen if you take methocarbamol for a long time. These might include:

  • Memory problems: Some people may experience issues with memory and have trouble remembering things.
  • Trouble concentrating: Long-term use can make it harder to focus or concentrate on tasks.
  • Weakness: Prolonged use might lead to a feeling of overall weakness in the body.
  • Persistent drowsiness: Feeling unusually sleepy or tired can be a long-term effect of taking methocarbamol.

If you notice these side effects and they don’t go away, talk to your doctor. They might need to adjust your dose or try a different medication. Regular check-ups with your doctor can help monitor and manage these side effects.

Serious

Serious side effects are rare but can happen. Contact your doctor immediately if you experience:

  • Severe allergic reactions: Symptoms like itching, swelling, rash, trouble breathing, and severe dizziness need urgent medical attention.
  • Slow or shallow breathing: Methocarbamol can depress the central nervous system [4], leading to dangerously slow or shallow breathing.
  • Seizures: Although rare, some people may experience seizures [5] when taking this medication.
  • Fainting: Sudden fainting spells can occur, especially if standing up too quickly.
  • Yellowing of the skin or eyes (jaundice): This can indicate liver problems and requires immediate medical attention.
  • Irregular heartbeat: Any unusual changes in heartbeat, whether too fast, too slow, or irregular, should be reported to a doctor immediately.

These serious side effects need medical attention right away. Always follow your doctor’s instructions when taking methocarbamol and let them know about any side effects that you experience. They can help you manage these effects and adjust your treatment if necessary.

Methocarbamol Warnings

Methocarbamol is generally safe when used as directed, but there are some important warnings to keep in mind. Knowing these warnings can help you use the medication safely and avoid potential problems.

Important Warnings

  • Allergic reactions: Some people may be allergic to methocarbamol. Allergic reaction symptoms include itching, rash, swelling, extreme dizziness, and breathing problems. If you experience any of these symptoms, seek medical help immediately.
  • Medical conditions: Inform your doctor if you have any medical conditions ­– especially kidney or liver disease – as these can affect how your body processes the medication.
  • Pregnancy and breastfeeding: If you are pregnant or breastfeeding, talk to your doctor before taking methocarbamol. The effects of methocarbamol on an unborn baby or nursing infant are not well-known, so it’s vital to discuss potential risks with your healthcare provider.
  • Operating machinery: Methocarbamol can cause drowsiness and dizziness, which can affect your ability to drive or operate machinery. Avoid these activities until you know how the medication affects you.
  • Alcohol: Avoid drinking alcohol while taking methocarbamol, as it can increase drowsiness and dizziness, making these side effects worse.
  • Other medications: Tell your doctor about all the medications you are taking, including prescription, over-the-counter, and herbal supplements. Methocarbamol can interact with other drugs, leading to harmful effects.

Is Expired Methocarbamol Dangerous?

Medications, including methocarbamol, have expiration dates for a reason. Using expired methocarbamol can be risky and may not provide the intended benefits.

Over time, medications can lose their potency. Expired methocarbamol may not work as well in relieving muscle pain and spasms.

Additionally, medications can undergo chemical changes after their expiration date, potentially leading to harmful effects or reduced safety.

In some cases, expired medications can become contaminated with bacteria, posing additional health risks.

If you have expired methocarbamol, do not use it. Instead, dispose of it properly. Here are some tips for safe disposal:

  • Many pharmacies and local health departments offer medication take-back programs [6] where you can safely dispose of expired or unused medications.
  • Follow any specific disposal instructions provided on the medication label or patient information leaflet.
  • If no take-back programs are available, you can mix the expired medication with an undesirable substance (like coffee grounds or cat litter) and place it in a sealed plastic bag before throwing it in the trash. This helps prevent accidental ingestion by children, pets, or others.

Methocarbamol Interaction Warnings

Methocarbamol can interact with other medications, which can change how it works or increase the risk of side effects. It’s important to be aware of these potential interactions so that methocarbamol can be safely used.

Common drug interactions

  • CNS depressants: Methocarbamol can enhance the effects of other CNS (central nervous system) depressants, such as sedatives, tranquilizers, and alcohol. This can lead to increased drowsiness, dizziness, and difficulty breathing.
  • Antihistamines: Taking methocarbamol with antihistamines (used to treat allergies) can increase drowsiness and dizziness.
  • Antidepressants: Some antidepressants can interact with methocarbamol, leading to increased side effects like drowsiness and dizziness.
  • Blood pressure medications: Methocarbamol can interact with certain blood pressure medications, potentially leading to low blood pressure and increased dizziness.
  • Seizure medications: Methocarbamol can interact with medications used to treat seizures, potentially altering their effectiveness or increasing side effects.

Preventing drug interactions

Always inform your doctor about all medications you are taking, including prescription, over-the-counter, and herbal supplements. Take methocarbamol exactly as prescribed and follow your doctor’s instructions regarding other medications. Be aware of any unusual side effects and report them to your doctor immediately.

Methocarbamol Addiction & Overdose Risk

Methocarbamol is generally considered to have a lower risk of addiction than some other muscle relaxants. However, misuse and overdose can still occur.

Understanding addiction risk

  • Low addiction potential: Methocarbamol is not classified as a controlled substance and is considered to have a low potential for addiction. However, some people may misuse it for its calming effects.
  • Signs of misuse: Misusing methocarbamol can include taking higher doses than prescribed, using it without a prescription, or taking it for reasons other than prescribed.
  • Dependence: Although rare, some people may develop a psychological dependence on methocarbamol, where they feel they need to take it to relax or feel better.

Overdose risk

  • Symptoms of overdose: Taking too much methocarbamol can lead to symptoms such as extreme drowsiness, dizziness, nausea, vomiting, slow breathing, and unconsciousness.
  • Emergency action: If you suspect an overdose, seek emergency medical help immediately. Overdose can be life-threatening and requires prompt treatment.

Preventing addiction and overdose

Always take methocarbamol exactly as prescribed by your doctor. Do not change the dose or frequency without consulting your healthcare provider. Do not mix methocarbamol with alcohol or other drugs, as this can increase the risk of overdose and severe side effects. Keep methocarbamol out of reach of children, pets, and others who might misuse it. Safely dispose of any unused or expired medication to prevent accidental or intentional misuse.

Methocarbamol | FAQs

How long does methocarbamol stay in your system?

Methocarbamol typically stays in your system for about 24 to 48 hours. However, the exact duration can vary depending on factors like your metabolism, age, and overall health.

Is methocarbamol a pain pill or muscle relaxer?

Methocarbamol is a muscle relaxer, not a pain pill. It works by relaxing the muscles and relieving muscle spasms, which can help reduce discomfort and improve mobility.

Can I use methocarbamol for anxiety?

No, methocarbamol is not intended for treating anxiety. It is specifically designed to relieve muscle spasms and should be used only as prescribed by your doctor for that purpose.

Can I use methocarbamol for back pain?

Yes, methocarbamol can be used for back pain if the pain is caused by muscle spasms or strains. It helps relax the muscles, which can alleviate pain and improve your ability to move. Always follow your doctor’s instructions when using this medication.

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Get Addiction Treatment in a World-Class Rehab Facility at Gratitude Lodge

If you feel that you or someone you care about needs help getting back on track from any form of substance abuse, reach out to Gratitude Lodge in Southern California. We treat all types of addictions, including methocarbamol addiction [7], at our world-class rehab facilities in Newport Beach and Long Beach, California.

Our medical detox programs help people withdraw from any type of addictive substance as safely and comfortably as possible. During detoxification at Gratitude Lodge, you’ll prepare yourself physically for ongoing inpatient treatment.

All Gratitude Lodge treatment programs reflect the unique nature of addiction by delivering personalized therapies, such as:

  • Holistic treatment
  • Counseling
  • Talk therapy
  • Motivational therapy
  • Family therapy
  • Group therapy
  • Medication management
  • Aftercare

Call our recovery experts for immediate assistance at 844-576-0144.

Sources

[1] https://www.mayoclinic.org/medical-professionals/digestive-diseases/news/use-of-antispasmodics-for-the-treatment-of-abdominal-pain/mac-20526520

[2] https://pubmed.ncbi.nlm.nih.gov/2858176/

[3] https://www.accessdata.fda.gov/drugsatfda_docs/label/2003/011011Orig1s070s071lbl.pdf

[4] https://www.ncbi.nlm.nih.gov/books/NBK565868/

[5] https://medlineplus.gov/druginfo/meds/a682579.html

[6] https://www.fda.gov/consumers/consumer-updates/where-and-how-dispose-unused-medicines

[7] https://www.gratitudelodge.com/barbiturate-addiction/

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Jenni Bussi

Jenni Busse MS, LPCC

Jenni Busse MS, LPSS is the Clinical Director at Gratitude Lodge. Jenni oversees the clinical program and the clinical team at Gratitude Lodge as a whole. Jenni has worked in treatment for almost 14 years. Her background as a licensed therapist and her passion for helping others intersected with addiction recovery when she started working primarily in detox residential treatment.
Joe Gilmore

Joseph Gilmore

Joseph Gilmore has been working in the addiction industry for half a decade and has been writing about addiction and substance abuse treatment during that time. He has experience working for facilities all across the country. Connect with Joe on LinkedIn.

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