Drug and Alcohol

Robaxin: What Is Methocarbamol (Robaxin)? A Comprehensive Guide to This Muscle Relaxant

What is Robaxin?

What is Robaxin? We examine this muscle relaxant in our blog. While not necessarily addictive, Robaxin can be risky for some. Learn more.

Written by

brian-mooreBrian Moore

Content Writer

Reviewed by

jeremy-arztJeremy Arzt

Chief Clinical Officer

Drug and Alcohol

September 15, 2023

Methocarbamol, commonly known by its brand name Robaxin, is a muscle relaxant medication used to treat conditions like spasms and chronic pain. It is generally prescribed when other treatments are not effective or tolerated. The main active ingredient in this drug is methocarbamol.

Like any prescription drug, it's important to understand all the side effects, interactions, and precautions associated with taking methocarbamol. It's also important to understand how it works and who should not take it. Also, while methocarbamol isn't considered to be addictive, it's capable of being abused.

This comprehensive guide will explain what methocarbamol is, how it works, common side effects, drug interactions, overdose information, and more.

What Is Robaxin?

Methocarbamol, also known by the brand name Robaxin, is a medicine that belongs to the skeletal muscle relaxant class of drugs. It is used to treat muscular pain and discomfort. Majorly caused by musculoskeletal conditions such as strains, sprains, and muscle spasms. Methocarbamol suppresses nerve impulses or signals that cause muscular spasms in the central nervous system.

The goal of this prescription drug is to offer brief relief from muscular pain and stiffness. It is given as part of a complete treatment strategy that includes rest, physical therapy, and other measures to treat the underlying disease-causing muscular soreness.

Robaxin is typically given orally in the form of a tablet. The dosage and frequency of administration are subject to change based on the degree of muscular pain and the individual's reaction to the medicine. Follow the doctor's advice and not exceed the recommended dose.

Are There Side Effects to Robaxin?

Methocarbamol has possible side effects, just like any other medicine. Drowsiness, dizziness, lightheadedness, and an upset stomach are common methocarbamol side effects. It is best to avoid driving or operating machinery while under the influence of Methocarbamol. Especially until you have a better understanding of how it affects you.

Although methocarbamol is usually safe, addressing any pre-existing medical issues or allergies with your healthcare professional before starting treatment is essential. For example, individuals with kidney or liver issues may require methocarbamol dosage changes or should avoid it entirely.

Other drugs, such as opioids, sedatives & alcohol, can interact with methocarbamol. These interactions can either improve Methocarbamol's benefits or raise the possibility of side effects.

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Robaxin: How Does Methocarbamol (Robaxin) Work? Understanding Its Mechanism of Action

Methocarbamol's specific mechanism of action is not entirely understood. It works by depressing the central nervous system (CNS). Especially the parts of the brain and spinal cord that control muscular activity.

Methocarbamol is believed to work as a sedative and muscle relaxant by decreasing nerve impulses or signal transmission inside the CNS. Methocarbamol is thought to increase the inhibitory effects of gamma-aminobutyric acid (GABA) in the spinal cord, resulting in reduced activity and hyperexcitability of motor neurons. This decrease in motor neuron activity reduces muscular spasms, stiffness, and discomfort.

By regulating the CNS, Methocarbamol efficiently lowers muscular activity and tension associated with musculoskeletal conditions. Offering relief from muscle pain and discomfort. It does not directly affect the muscles but operates on the neurological system to relieve symptoms.

Methocarbamol does not treat the underlying cause of muscular pain or the injury or condition causing the suffering. It instead gives brief comfort by addressing the symptoms of muscular spasms or strains.

Robaxin: What Is Methocarbamol Used For?

Methocarbamol is a drug that is generally used to relax muscles. It is frequently used to treat muscular pain such as strains, sprains, and muscle spasms. Here's a deeper look at methocarbamol uses and applications:

Muscle Spasms

Methocarbamol is quite good in relieving muscle spasms. These are involuntary muscular contractions that can cause severe pain and discomfort. It blocks the nerve impulses that trigger spasms, allowing the muscles to relax.

Musculoskeletal Disorders

Methocarbamol is widely given for acute musculoskeletal issues such as back pain, neck discomfort, and sports or accident injuries. It relieves muscular tension and soreness, allowing people to heal and participate in rehabilitation activities more efficiently.

Postoperative Recovery

Methocarbamol may relieve postoperative pain, particularly following surgeries affecting the musculoskeletal system. Muscle relaxation and pain relief facilitate a more pleasant healing process.

Physical Therapy

Methocarbamol can be administered with physical therapy to help treat musculoskeletal issues. It can improve the efficiency of physical therapy activities and help people regain movement by minimizing muscular spasms and promoting muscle relaxation.


Methocarbamol can also be used to treat tetanus. It is a potentially deadly bacterial infection that damages the nervous system and produces severe muscular spasms. It is frequently used with other drugs and treatments to control muscular spasms and relieve symptoms. Methocarbamol's muscle relaxant features are crucial in treating the muscular pain and spasms associated with tetanus, contributing to the patient's comfort and overall results.

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What Are the Potential Side Effects of Methocarbamol?

Although methocarbamol is typically well-accepted, it does have possible side effects like any other drug. When taking Methocarbamol, be aware of the following possible side effects. The following are some of the possible adverse effects.

Dizziness and Drowsiness

Some people may experience sleepiness or dizziness after using methocarbamol. Avoid tasks requiring attentiveness, like driving or operating machinery, until you better understand how the medicine affects you.


When using Methocarbamol, some people can experience lightheadedness. Carefully rise from a sitting or sleeping position to reduce the risk of dizziness or falling.

Stomach Discomfort

Methocarbamol may occasionally produce gastrointestinal symptoms such as nausea and vomiting. Taking the drug with meals or milk may help reduce these side effects.

Reactions to Allergens

Methocarbamol allergies are uncommon, although they can occur. A rash, itching, swelling, acute dizziness, or trouble breathing are all symptoms of an allergic response.

Low Blood Pressure

Methocarbamol has the potential to lower blood pressure. This could result in symptoms such as dizziness or fainting. Blood pressure should be checked frequently. Particularly if you have a history of low blood pressure or are on other drugs that might affect blood pressure.

Other Possible Effects

Confusion, blurred vision, headache, dry mouth, or a metallic taste on the tongue are some of the less frequent side effects.

Robaxin: Is Methocarbamol Addictive?

Despite being classified as a Schedule IV regulated drug, methocarbamol can be addictive. Although it may not offer the same intense euphoria as highly addictive drugs when misused or abused, it can still develop into physical and psychological dependency.

Though methocarbamol is generally prescribed as a muscle relaxant, people may be tempted to take it at greater dosages or for more extended periods than suggested to try to experience a more prominent sedative effect. As the body adjusts to the drug's presence and takes higher doses to produce the intended impact, this abuse can swiftly spiral into a cycle of dependence.

Methocarbamol used with other drugs, such as opioids or alcohol, raises the risk of addiction. Interactions between these drugs can enhance their effects, resulting in increased sedation and an increased risk of addiction.

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Who Gets Addicted to Robaxin?

Those with a history of drug misuse are likelier to get addicted to Methocarbamol. For those in recovery, the attraction of avoiding physical or mental suffering through the medication's numbing effects can be a deadly temptation.

Attempting to discontinue Methocarbamol abruptly after a long term of use might result in withdrawal symptoms. These symptoms can range from modest discomfort, such as anxiety and sleeplessness, to more severe manifestations, such as muscular pains, nausea, and, in extreme circumstances, seizures.

Symptoms and Signs of Robaxin Addiction

Identifying Methocarbamol addiction symptoms and signs is necessary for early intervention and treatment. Although methocarbamol is not considered highly addictive, it can develop into dependence if misused or used for an extended period. The following are some of the most typical symptoms and indicators of Methocarbamol addiction.

Increased Tolerance

Increased tolerance means higher doses of methocarbamol are required to get the intended effect. The development of tolerance is a sign that the body has become used to the substance.

Compulsive Use

Difficulty managing or stopping methocarbamol use is another red flag of methocarbamol addiction. Taking medicine when it is no longer medically necessary or in higher doses than prescribed is a classic sign of drug abuse. Also, some users develop an obsession with obtaining and using methocarbamol.

Prescription Fraud or Doctor Shopping

Doctor shopping involves obtaining prescriptions from a variety of healthcare professionals. Using fraudulent methods to get additional methocarbamol is illegal and also a major sign of a problem with methocarbamol.

Withdrawal Symptoms

Anxiety, restlessness, muscular pains, sleeplessness, sweating, and tremors.

Neglecting Responsibilities

Methocarbamol consumption takes priority over personal, professional, and social duties, as well as a failure to fulfill commitments as a result of addiction.

Social Relationships

Relationships with family, friends, and colleagues become strained. This is often due to behavioral changes, mood swings, and secretive behavior.

Financial Problems

This includes spending a large sum of money on methocarbamol and taking part in illegal activities to fund the use of drugs.

Physical and Mental Health Problems

Methocarbamol addiction is connected with weight loss, exhaustion, sadness, anxiety, memory issues, and an overall decline in health.

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Does Robaxin Make You Sleepy?

Yes, one of the side effects of methocarbamol is sleepiness and drowsiness. It works as a central nervous system depressant, slows down brain activity, and has a soothing effect. This soothing effect is intended when methocarbamol is administered as a muscle relaxant to help reduce muscular spasms and associated pain.

Methocarbamol sleepiness varies in degree from person to person. Some people may feel minor sleepiness, while others may feel far more tired and struggle to remain awake. If you feel overly tired, take Methocarbamol as directed and avoid tasks that need attention, such as driving or operating heavy machinery.

Methocarbamol Withdrawal Symptoms

Withdrawal symptoms can occur when someone suddenly stops taking methocarbamol or dramatically lowers their dosage after prolonged use. The severity and duration of these symptoms might vary based on factors such as the duration and dosage of methocarbamol use.

Here are some of the most typical Methocarbamol withdrawal symptoms:

Rebound Muscle Spasms

Methocarbamol is usually used as a muscle relaxant; thus, there may be a rebound effect, resulting in more muscular spasms or tension.

Anxiety and Restlessness

Individuals may suffer increased anxiety, restlessness, or uneasiness when their bodies adjust to the lack of methocarbamol.


Sleep difficulties are possible during methocarbamol withdrawal.

Chills and Sweating

Some people may feel excessive sweating or severe chills due to the body's reaction to methocarbamol withdrawal.

Nausea and Digestive Problems

Methocarbamol withdrawal can cause upset stomach, nausea, and gastrointestinal pain.


Methocarbamol withdrawal symptoms may include headaches or migraines.

Mood Swings

During the withdrawal stage, users may experience emotional swings, impatience, or mood swings.

Robaxin: What Drugs Does It Interact With?

Methocarbamol can potentially interact with other drugs, substances, and medical conditions. These interactions may decrease methocarbamol's efficiency or raise the risk of side effects. Here are some important facts to remember about methocarbamol interactions.

Central Nervous System Depressants

Methocarbamol can intensify the effects of alcohol, opioids, benzodiazepines, and tranquilizers.

When methocarbamol is used with these drugs, it might cause drowsiness, dizziness, and respiratory depression.


Methocarbamol can enhance the sedative effects of antihistamines, which are commonly used in allergy and cold treatments. Continued usage might result in excessive sleepiness and even cognitive impairment.


Methocarbamol may enhance the effects of anticoagulants such as warfarin. This can raise the risk of bleeding. Blood clotting parameters need to be closely monitored.

Urinary Alkalinizers

Methocarbamol excretion can be increased when used with urinary alkalinizers such as sodium bicarbonate. It might make methocarbamol less effective.

Kidney or Liver Disease

Methocarbamol dose changes or careful monitoring may be required if you have impaired kidney or liver function. Kidney or liver disorders may hinder drug elimination, raising the risk of side effects or decreasing effectiveness.

Sedating Antidepressants

Certain antidepressant drugs, such as tricyclic antidepressants, can be made more sedative by methocarbamol. When these drugs are used together, they might cause drowsiness and impair coordination.

CNS Stimulants

Methocarbamol may interfere with the stimulant effects of amphetamines or methylphenidate. The combination of these drugs may diminish the efficacy of both.

Blood Pressure Medications

Methocarbamol may have additional effects when used with blood pressure medicines. This may result in dizziness or lightheadedness due to abnormally low blood pressure.

Feel Like You're Not in Control of Methocarbamol Anymore? Reach Out to The Edge Treatment Center Today

If you or a loved one has been struggling with methocarbamol abuse, The Edge Treatment Center may be able to help. We offer personalized programs tailored to meet the individual needs of each client and provide the support they need to recover from addiction and start building a better life.

We offer personalized programs tailored to meet the individual needs of each client and provide the support they need to recover from addiction and start building a better life. Our team of compassionate professionals includes psychiatrists, therapists, nurses, and many more. The Edge utilizes evidence-based techniques like counseling, support groups, behavioral therapy, and medication management to help our clients overcome addiction.

Please don't hesitate to contact The Edge Treatment Center. We are available 24 hours a day, 7 days a week to answer any questions you may have and help get you on the road to recovery. Our caring staff will walk you through the intake process, conduct an assessment to determine your individual needs, and recommend a personalized treatment plan. We accept most major insurance plans.

Help is just a quick phone call away.

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