What is methocarbamol 750mg. Methocarbamol 750mg: Uses, Side Effects, and Precautions for Muscle Spasm Relief
What are the primary uses of methocarbamol 750mg. How should patients take this medication for optimal results. What are the most common side effects of methocarbamol. When should patients seek medical attention while using this drug. How does methocarbamol interact with other medications.
Understanding Methocarbamol: A Powerful Muscle Relaxant
Methocarbamol is a widely prescribed medication used to alleviate muscle spasms and associated pain. This potent muscle relaxant works by helping to relax muscles, providing relief to patients suffering from various musculoskeletal conditions. Typically prescribed in 750mg doses, methocarbamol is often used in conjunction with other treatments such as rest and physical therapy to maximize its effectiveness.
How does methocarbamol work?
Methocarbamol acts on the central nervous system to reduce muscle tension and spasms. While its exact mechanism of action is not fully understood, it is believed to inhibit nerve impulses that trigger muscle contractions, thereby promoting relaxation and reducing pain.
Proper Usage and Dosage Guidelines for Methocarbamol 750mg
To ensure the safe and effective use of methocarbamol, patients should adhere to their doctor’s instructions carefully. The medication can be taken with or without food, depending on individual tolerance and preference.
- Typical initial dosage: 1500mg (two 750mg tablets) taken four times daily
- Maintenance dosage: 4000mg to 4500mg per day in divided doses
- Maximum recommended daily dose: 6000mg
It’s crucial to note that increasing the dose or frequency of use without medical supervision can lead to increased side effects without improving the condition more rapidly.
Can methocarbamol be taken long-term?
While methocarbamol is generally safe for short-term use, long-term usage should be monitored by a healthcare provider. Prolonged use may lead to dependence or mask underlying conditions that require different treatment approaches.
Common Side Effects and When to Seek Medical Attention
As with any medication, methocarbamol can cause side effects. While many are mild and subside as the body adjusts to the medication, some may require medical attention.
What are the most frequent side effects of methocarbamol?
Common side effects include:
- Drowsiness
- Dizziness
- Lightheadedness
- Stomach upset
- Nausea or vomiting
- Blurred vision
If these effects persist or worsen, it’s important to consult a healthcare provider promptly.
When should patients seek immediate medical help?
Serious side effects requiring immediate medical attention include:
- Persistent nausea or vomiting
- Fainting
- Slow heartbeat
- Yellowing of eyes or skin (jaundice)
- Mental or mood changes (confusion, forgetfulness)
- Signs of allergic reaction (rash, itching, swelling, severe dizziness, trouble breathing)
Precautions and Contraindications for Methocarbamol Use
Before starting methocarbamol, patients should inform their healthcare provider of any allergies, medical conditions, or medications they are currently taking. This information is crucial for preventing potential complications and ensuring safe usage.
Who should exercise caution when using methocarbamol?
Special precautions should be taken by:
- Patients with liver disease
- Older adults, who may be more sensitive to side effects
- Pregnant or breastfeeding women
- Individuals operating heavy machinery or driving
Alcohol and marijuana can intensify the drowsiness and dizziness caused by methocarbamol, so their use should be avoided or limited during treatment.
Drug Interactions: What to Watch Out For
Methocarbamol can interact with various medications, potentially altering their effectiveness or increasing the risk of side effects. It’s essential to inform healthcare providers about all medications, including over-the-counter drugs and herbal supplements.
Which medications commonly interact with methocarbamol?
Significant interactions may occur with:
- Opioid pain relievers
- Cough suppressants containing codeine or hydrocodone
- Anxiety medications (e.g., alprazolam, lorazepam)
- Sleep aids (e.g., zolpidem)
- Other muscle relaxants
- Antihistamines
These interactions can lead to increased drowsiness and impaired cognitive function, potentially compromising safety in daily activities.
Methocarbamol and Laboratory Tests: Potential Interference
An often overlooked aspect of methocarbamol use is its potential to interfere with certain laboratory tests. This interference can lead to false results, potentially impacting diagnosis and treatment decisions.
Which laboratory tests can be affected by methocarbamol?
Methocarbamol may interfere with:
- VMA (vanillylmandelic acid) urine screening test
- 5-HIAA (5-hydroxyindoleacetic acid) urine screening test
Patients should inform laboratory personnel and all healthcare providers about their methocarbamol use to ensure accurate interpretation of test results.
Overdose Risks and Emergency Response
While methocarbamol is generally safe when used as prescribed, overdose is possible and can be dangerous. Recognizing the signs of overdose and knowing how to respond can be life-saving.
What are the symptoms of methocarbamol overdose?
Symptoms of overdose may include:
- Severe drowsiness
- Confusion
- Blurred or double vision
- Loss of consciousness
- Difficulty breathing
If overdose is suspected, it’s crucial to seek emergency medical attention immediately. In the United States, contact the local poison control center at 1-800-222-1222 or call 911 for severe symptoms. Canadian residents should call their local poison control center or seek emergency medical care.
Alternatives to Methocarbamol: Exploring Other Treatment Options
While methocarbamol is effective for many patients, it’s not the only option for treating muscle spasms and pain. Depending on the underlying cause and individual patient factors, healthcare providers may consider alternative treatments.
What are some alternatives to methocarbamol for muscle spasm relief?
Alternative treatments may include:
- Other muscle relaxants (e.g., cyclobenzaprine, carisoprodol)
- Non-steroidal anti-inflammatory drugs (NSAIDs)
- Physical therapy and exercise programs
- Massage therapy
- Acupuncture
- Heat or cold therapy
The choice of treatment depends on the specific condition, patient preferences, and potential risks or contraindications associated with each option.
Methocarbamol 750mg is a valuable tool in the management of muscle spasms and associated pain. When used correctly and under medical supervision, it can significantly improve quality of life for many patients. However, as with any medication, it’s crucial to be aware of potential side effects, interactions, and precautions. Open communication with healthcare providers, adherence to prescribed dosages, and vigilance for any adverse reactions are key to ensuring safe and effective use of methocarbamol. By understanding the benefits and risks associated with this medication, patients can make informed decisions about their treatment and work collaboratively with their healthcare team to achieve optimal outcomes in managing their musculoskeletal conditions.
Methocarbamol Oral: Uses, Side Effects, Interactions, Pictures, Warnings & Dosing
Uses
Methocarbamol is used to treat muscle spasms/pain. It is usually used along with rest, physical therapy, and other treatment. It works by helping to relax the muscles.
How to use Methocarbamol
Take this medication by mouth with or without food as directed by your doctor. Do not increase your dose or use this drug more often or for longer than prescribed. Your condition will not improve any faster, and your risk of side effects will increase.
The dosage is based on your medical condition and response to treatment.
Tell your doctor if your condition does not improve or if it worsens.
Side Effects
Drowsiness, dizziness, lightheadedness, stomach upset, nausea/vomiting, or blurred vision may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly.
Remember that this medication has been prescribed because your doctor has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
Tell your doctor right away if you have any serious side effects, including: nausea/vomiting that doesn’t stop, fainting, slow heartbeat, yellowing eyes/skin, mental/mood changes (such as confusion, forgetfulness).
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
In the US – Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch.
In Canada – Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
Precautions
Before taking methocarbamol, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication, tell your doctor or pharmacist your medical history, especially of: liver disease.
This drug may make you dizzy or drowsy or blur your vision. Alcohol or marijuana (cannabis) can make you more dizzy or drowsy. Do not drive, use machinery, or do anything that needs alertness or clear vision until you can do it safely. Avoid alcoholic beverages. Talk to your doctor if you are using marijuana (cannabis).
Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).
Older adults may be more sensitive to the side effects of this drug, especially confusion, dizziness, or drowsiness. These side effects can increase the risk of falling.
During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor.
It is unknown if this drug passes into breast milk. Consult your doctor before breast-feeding.
Interactions
Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor’s approval.
Tell your doctor or pharmacist if you are taking other products that cause drowsiness such as opioid pain or cough relievers (such as codeine, hydrocodone), alcohol, marijuana (cannabis), drugs for sleep or anxiety (such as alprazolam, lorazepam, zolpidem), other muscle relaxants (such as carisoprodol, cyclobenzaprine), or antihistamines (such as cetirizine, diphenhydramine).
Check the labels on all your medicines (such as allergy or cough-and-cold products) because they may contain ingredients that cause drowsiness. Ask your pharmacist about using those products safely.
This medication may interfere with certain laboratory tests (including VMA or 5-HIAA urine screening test), possibly causing false test results. Make sure laboratory personnel and all your doctors know you use this drug.
Does Methocarbamol interact with other drugs you are taking?
Enter your medication into the WebMD interaction checker
Overdose
If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center. Symptoms of overdose may include: severe drowsiness/dizziness, seizures, loss of consciousness.
Do not share this medication with others.
This medication has been prescribed for your current condition only. Do not use it later for another condition unless your doctor directs you to do so. A different medication may be necessary in that case.
If you miss a dose, take it as soon as you remember. If it is near the time of the next dose, skip the missed dose. Take your next dose at the regular time. Do not double the dose to catch up.
Store at room temperature away from light and moisture. Do not store in the bathroom. Keep all medications away from children and pets.
Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.
Images
methocarbamol 750 mg tablet
Color: whiteShape: oblongImprint: H 115
This medicine is a white, oblong, tablet imprinted with “H” and “115”.
methocarbamol 750 mg tablet
Color: orangeShape: oblongImprint: B135
This medicine is a white, oblong, tablet imprinted with “H” and “115”.
methocarbamol 500 mg tablet
Color: whiteShape: roundImprint: S 225
This medicine is a white, oblong, tablet imprinted with “H” and “115”.
methocarbamol 750 mg tablet
Color: whiteShape: oblongImprint: S 226
This medicine is a white, oblong, tablet imprinted with “H” and “115”.
methocarbamol 500 mg tablet
Color: whiteShape: roundImprint: West-ward 290
This medicine is a white, oblong, tablet imprinted with “H” and “115”.
methocarbamol 500 mg tablet
Color: light orangeShape: roundImprint: B134
This medicine is a white, oblong, tablet imprinted with “H” and “115”.
methocarbamol 750 mg tablet
Color: whiteShape: oblongImprint: 612 logo
This medicine is a white, oblong, tablet imprinted with “H” and “115”.
methocarbamol 500 mg tablet
Color: light orangeShape: roundImprint: G 500
This medicine is a white, oblong, tablet imprinted with “H” and “115”.
methocarbamol 500 mg tablet
Color: whiteShape: roundImprint: 611 and logo
This medicine is a white, oblong, tablet imprinted with “H” and “115”.
methocarbamol 750 mg tablet
Color: whiteShape: oblongImprint: ASC 750
This medicine is a white, oblong, tablet imprinted with “H” and “115”.
methocarbamol 500 mg tablet
Color: whiteShape: roundImprint: ASC 500
This medicine is a white, oblong, tablet imprinted with “H” and “115”.
methocarbamol 500 mg tablet
Color: orangeShape: roundImprint: AP212
This medicine is a white, oblong, tablet imprinted with “H” and “115”.
methocarbamol 750 mg tablet
Color: yellowShape: oblongImprint: AP211
This medicine is a white, oblong, tablet imprinted with “H” and “115”.
methocarbamol 750 mg tablet
Color: light orangeShape: oblongImprint: G 750
This medicine is a white, oblong, tablet imprinted with “H” and “115”.
methocarbamol 500 mg tablet
Color: whiteShape: oblongImprint: H 114
This medicine is a white, oblong, tablet imprinted with “H” and “115”.
methocarbamol 750 mg tablet
Color: whiteShape: oblongImprint: West-ward 292
This medicine is a white, oblong, tablet imprinted with “H” and “115”.
methocarbamol 750 mg tablet
Color: whiteShape: oblongImprint: logo 612
This medicine is a white, oblong, tablet imprinted with “H” and “115”.
methocarbamol 500 mg tablet
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This medicine is a white, oblong, tablet imprinted with “H” and “115”.
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CONDITIONS OF USE: The information in this database is intended to supplement, not substitute for, the expertise and judgment of healthcare professionals. The information is not intended to cover all possible uses, directions, precautions, drug interactions or adverse effects, nor should it be construed to indicate that use of a particular drug is safe, appropriate or effective for you or anyone else. A healthcare professional should be consulted before taking any drug, changing any diet or commencing or discontinuing any course of treatment.
Methocarbamol Dosage Guide + Max Dose, Adjustments
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Medically reviewed by Drugs.com. Last updated on Mar 6, 2023.
Applies to the following strengths: 500 mg; 750 mg; 100 mg/mL
Usual Adult Dose for:
- Muscle Spasm
- Tetanus
Usual Pediatric Dose for:
- Tetanus
Additional dosage information:
- Renal Dose Adjustments
- Liver Dose Adjustments
- Precautions
- Dialysis
- Other Comments
Usual Adult Dose for Muscle Spasm
ORAL:
Initial Dose: 1500 mg orally 4 times a day
- Doses of 6000 mg per day are generally used for the first 48 to 72 hours
- In severe cases, doses up to 8000 mg per day may be used
Maintenance dose:
500 mg tablets: 1000 mg orally 4 times a day
750 mg Tablets: 750 mg orally every 4 hours OR 1500 mg orally 3 times a day
PARENTERAL:
- For the relief of moderate symptoms: 1 g IV or IM once, then switch to oral
- For relief of severe symptoms or postoperative conditions: 1 g IV or IM every 8 hours
Maximum Dose: 3 g in 24-hours
Maximum Duration: 3 consecutive days; may repeat after a drug-free interval of 48 hours
Comments:
- Higher doses are recommended in the first 48 to 72 hours of treatment, then doses can usually be reduced to approximately 4000 mg per day.
- Oral tablets should be administered whenever feasible; IV/IM therapy should not be administered for more than 3 consecutive days without a drug-free interval of 48 hours.
Use: As an adjunct to rest and physical therapy for the relief of discomfort associated with acute, painful musculoskeletal conditions.
Usual Adult Dose for Tetanus
Initial dose: 1 to 2 g IV followed by an additional 1 to 2 g via IV infusion
Maximal Initial Dose: 3 g
Repeat initial IV dose every 6 hours until NG tube or oral therapy is possible
Once NG tube is in place, may crush tablets, suspend in water or saline and administer through tube
- Total oral doses of up to 24 g may be needed based on patient response
Comments:
- There is clinical evidence to suggest this drug may have a beneficial effect in the control of the neuromuscular manifestations of tetanus.
- This drug should not replace the usual procedure of debridement, tetanus antitoxin, penicillin, tracheotomy, attention to fluid balance, and supportive care; if used, this drug should be added to the regimen as soon as possible.
Use: To control the neuromuscular manifestations of tetanus.
Usual Pediatric Dose for Tetanus
Initial dose: 15 mg/kg or 500 mg/m2 IV; repeat initial dose every 6 hours as needed
Maximum dose: 1.8 g/m2/day IV for 3 consecutive days
Maintenance dose: May be given by injection into tubing or by IV infusion with an appropriate quantity of fluid
Comments:
- There is clinical evidence to suggest this drug may have a beneficial effect in the control of the neuromuscular manifestations of tetanus.
- This drug should not replace the usual procedure of debridement, tetanus antitoxin, penicillin, tracheotomy, attention to fluid balance, and supportive care; if used, this drug should be added to the regimen as soon as possible.
Use: To control the neuromuscular manifestations of tetanus.
Renal Dose Adjustments
Oral therapy: No adjustment recommended
Injectable therapy: Not recommended in patients with renal insufficiency due to the high concentration of polyethylene glycol in the solution
Liver Dose Adjustments
Use with caution, dose adjustment may be required, especially in patients with cirrhosis; however, no specific guidelines have been suggested
Precautions
CONTRAINDICATIONS:
- Hypersensitivity to active substance or any product excipients
- Known or suspected renal pathology (injection; due to presence of polyethylene glycol 300 in the vehicle)
Safety and efficacy or oral therapy have not been established in patients younger than 16 years.
Safety and efficacy or injectable therapy have not been established in patients younger than 18 years, except in tetanus.
Consult WARNINGS section for additional precautions.
Dialysis
Data not available
Other Comments
Administration advice:
Oral Therapy: Take orally with or without food
Injectable Therapy:
- For IV and IM administration only; do not administer subcutaneously
- Total daily dose should not exceed 3 g per day (3 vials) for more than 3 consecutive days except in the treatment of tetanus; see below for special directions for use in tetanus
For IV Administration:
- May administer undiluted IV directly into vein at a maximum rate of 300 mg/minute (3 mL/minute)
- May dilute and administer via IV infusion using normal saline or D5W; 1 g (1 vial) should be diluted in no more than 250 mL
- Use caution to avoid vascular extravasation; this hypertonic solution may cause thrombophlebitis
- Patient should remain recumbent during and for at least 10 to 15 minutes following injection
For IM Administration:
- Inject no more than 500 mg (5 mL) into each gluteal region
- Injections may be repeated at 8-hour intervals; switch to oral therapy as soon as feasible
Special Directions for Use in Tetanus:
- Inject 1 or 2 g (10 or 20 mL) directly into tubing of inserted indwelling needle.
- Add 1 or 2 g (10 or 20 mL) to infusion bottle to allow for a total of 3 g (3 vials) as initial dose
Storage requirements:
- Once IV infusion is prepared: Do not refrigerate
IV compatibility: Compatible in normal saline and dextrose 5% solution
General:
- Polyethylene glycol 300 is present in the injectable formulation; large doses of polyethylene glycol 300 are known to increase preexisting acidosis and urea retention in patients with renal impairment; while the amount present is within the limits of safety, use is contraindicated in patients with renal impairment out of an abundance of caution.
Patient advice:
- Patients should understand that this drug may impair their mental and/or physical abilities to perform hazardous tasks such as driving, and they should be counseled appropriately.
- Patients should understand that this drug is a CNS depressant and patients should be cautioned about concomitant use of alcohol or other CNS depressants.
- Patients should be instructed to speak with their healthcare provider if they are pregnant, intending to become pregnant or breastfeeding.
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Related treatment guides
- Muscle Spasm
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Further information
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Methocarbamol – instructions for use
Methocarbamol
Instruction:
- Pharmacological action
- Readings
- Contraindications
- Pregnancy and breastfeeding
- Dosage and Administration
- Side effects
- Transport management
- Classification
Pharmacological action
Methocarbamol is a central muscle relaxant that blocks polysynaptic reflexes of the spinal cord, reduces nerve transmission in the spinal and supraspinal polysynaptic pathways and prolongs the refractory period of muscle cells. Methocarbamol does not affect the contraction of muscle fibers, motor end plates or nerve fibers.
Indications
- Painful muscle spasm in diseases and injuries of the musculoskeletal system;
- complementary treatment for tetanus.
Contraindications
- Hypersensitivity to methocarbamol.
- Renal insufficiency (for injectable form).
Pregnancy and breastfeeding
Use in pregnancy
FDA fetal category C.
No adequate and well-controlled clinical studies have been conducted on the safety of methocarbamol during pregnancy.
The use of methocarbamol in pregnant women is not recommended, unless absolutely necessary, when the expected benefit to the mother outweighs the potential risk to the fetus.
Use during breastfeeding
Special studies on the safety of the use of methocarbamol during breastfeeding have not been conducted.
It is not known if the drug is excreted in breast milk. A risk to the infant cannot be ruled out.
It is recommended to stop breast-feeding if the drug is used.
Dosage and Administration
Children, tetanus only, IV: 15 mg/kg or 500 mg/m 2 every 6 hours, maximum dose 1.8 g/m 2 /day for 3 days.
Adults: muscle spasm – by mouth: 1.5 g 4 times a day for 2-3 days, then 4-4.5 g / day in 3-6 divided doses; intramuscularly, intravenously (if it is impossible to ingest): 1 g 3 times a day for 3 days; tetanus IV: 1–2 g bolus, then infusion, 1–2 g, maximum total dose 3 g; if necessary, this scheme is repeated every 6 hours.
Side effects
The frequency of adverse reactions has not been determined.
From the cardiovascular system
Bradycardia, hyperemia, hypotension, syncope, thrombophlebitis.
From the side of the central nervous system
Amnesia, ataxia, confusion, dizziness, drowsiness, headache, insomnia, metallic taste, sedation, convulsions, dizziness.
Skin
Itching, skin rash, urticaria.
From the gastrointestinal tract
Dyspepsia, nausea, vomiting.
Hematological and oncological disorders
Leukopenia.
From the liver
Cholestatic jaundice, jaundice.
Hypersensitivity
Anaphylaxis, angioedema, hypersensitivity reactions.
Local
Local exfoliation of the skin (injection), pain at the injection site.
On the part of the organ of vision
Blurred vision, conjunctivitis, diplopia, nystagmus.
Respiratory
Nasal congestion.
Other
Fever.
Influence on the ability to drive vehicles and control mechanisms
Due to the fact that methocarbamol can cause dizziness and drowsiness, it is necessary to refrain from driving vehicles and engaging in activities that require increased concentration of attention and speed of psychomotor reactions.
Classification
ATX
M03BA03
Pharmacological group
n-anticholinergics (muscle relaxants)
ICD codes 10
A35 Other forms of tetanus
R25.3 Fasciculation
R52.9 Pain, unspecified
FDA pregnancy category
C
(risk not excluded)
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Information about the active substance Methocarbamol is intended for medical and pharmaceutical professionals, for reference purposes only. The instructions are not intended to replace professional medical advice, diagnosis or treatment. The information contained here may change over time. The most accurate information on the use of preparations containing the active substance Metocarbamol is contained in the manufacturer’s instructions attached to the package.
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Methocarbamol
Composition
Methocarbamol
Formulations
Tablet
Therapeutic indications
As a short-term adjunct to the symptomatic treatment of acute musculoskeletal disorders associated with painful muscle spasms.
Dosage and Administration
For oral use.
Dosage
Adults: The usual dose is 2 tablets four times daily, but therapeutic response has been achieved with doses as low as 1 tablet three times daily.
Elderly: Half the maximum dose or less may be sufficient to obtain a therapeutic response.
Pediatric population
Not recommended.
Liver disorders
In patients with chronic liver disease, the half-life may be increased. Therefore, consideration should be given to increasing the dose interval.
Contraindications
Coma or precoma. Known brain damage or epilepsy. Myasthenia gravis.
Special warnings and precautions
Methocarbamol 750 should be used with caution in patients with renal or hepatic impairment.
Effects on the ability to drive and use machines
This product may cause drowsiness and patients receiving it should not drive or operate machinery unless their physical and mental abilities are not affected – especially if other drugs that may cause drowsiness are also being taken.
Side effects
Adverse reactions reported concomitantly with methocarbamol include
Body as a Whole: Angioedema, anaphylactic reaction, fever, headache.
Cardiovascular system: Bradycardia, flushing, hypotension, syncope.
Digestive system: Dyspepsia, jaundice (including cholestatic jaundice), nausea and vomiting.
Blood and lymphatic system: Leukopenia.
Nervous System: Restlessness, anxiety, tremor, amnesia, confusion, diplopia, dizziness or vertigo, dizziness, drowsiness, insomnia, mild muscle incoordination, nystagmus, convulsions (including grand mal).
Skin and special sensations: Blurred vision, conjunctivitis with nasal congestion, metallic taste, itching, rash, urticaria.
Reporting suspected adverse reactions
It is important to report suspected adverse reactions after a medicinal product has been approved. This allows you to constantly monitor the balance of benefit / risk of the drug. Healthcare professionals are asked to report any suspected adverse reactions through the Yellow Card System, website: www. mhra.gov.uk/yellowcard.
Overdose
Limited information is available on the acute toxicity of methocarbamol. An overdose of methocarbamol is often combined with alcohol or other CNS depressants and includes the following symptoms: nausea, drowsiness, blurred vision, hypotension, seizures, and coma. One adult survived after deliberately ingesting 22 to 30 grams of methocarbamol without serious toxicity. Another adult survived a dose of 30 to 50 grams. The main symptom in both cases was extreme drowsiness. Treatment was symptomatic and recovery was uneventful. However, there have been cases of fatal overdose.
Treatment of overdose includes symptomatic and supportive treatment. Supportive measures include maintaining an adequate airway, monitoring urination and vital signs, and administering intravenous fluids if necessary. The usefulness of hemodialysis in the treatment of overdose is unknown.
Pharmacodynamics
Pharmacotherapeutic group: Muscle relaxants, centrally acting drugs
Methocarbamol-750 is used as a short-term adjunct to the symptomatic treatment of acute disorders of the musculoskeletal system associated with painful muscle spasms.
The mechanism of action of methocarbamol in humans has not been established, but may be due to general depression of the central nervous system. It has no direct effect on the contractile mechanism of the striated muscle, motor lamina or nerve fiber.
Pharmacokinetics
Methocarbamol is absorbed from the gastrointestinal tract and produces peak plasma concentrations in about 1-3 hours. Its activity comes from an intact molecule, and only a small part is converted to guaifenesin.
Impaired renal function
The clearance of methocarbamol in patients with impaired renal function on maintenance hemodialysis was reduced by approximately 40% compared with the normal population, although the mean half-life in the two groups was the same (1.2 and 1. 1 hour respectively).
Hepatic disorders
In patients with liver cirrhosis secondary to alcoholism, the mean total clearance of methocarbamol was reduced by approximately 70% compared with the normal population (11.