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Generic name: Methocarbamol
Drug class: skeletal muscle relaxants

What is Robaxin?

Robaxin works as a muscle relaxer. It blocks nerve impulses that send pain signals to the brain.Robaxin can be used in conjunction with physical therapy and rest to treat muscle injuries or pain.The injection of Robaxin is used to treat tetanus (lockjaw), which causes painful muscle tightening.


If you have an allergy to methocarbamol, then Robaxin should be avoided.Tell your doctor before using Robaxin if you suffer from myasthenia gravis.After the first two or three days, you may need to lower your dosage.Robaxin can impair your reactions or thinking. You should be careful when driving or doing anything else that requires alertness. Alcohol can enhance certain side effects.

Before you take this drug

If you have an allergy to methocarbamol, then Robaxin should be avoided.

Tell your doctor any time any medication seems unsafe:

  • Kidney disease
  • A seizure;
  • Myasthenia gravis.

Methocarbamol can harm an unborn child. Prevent pregnancy by using effective birth control, and inform your doctor immediately if you fall pregnant.Breastfeeding may not be possible while taking this medication.You should ask your doctor if there are any risks.Anyone younger than 16 is not allowed to use Robaxin, unless it's for tetanus treatment.

How to take Robaxin?

Follow the instructions on your prescription label and read all medication guides or instruction sheets. Read all instructions and directions included on the prescription label. This medication is part of an overall treatment plan that may include physical therapy, rest, and other pain-relieving measures.Robaxin orally is taken by mouth. After the first two or three days, you may need to lower your dose. Follow your doctor's instructions carefully.The injection of Robaxin is given either as an intravenous infusion or into the muscle. This injection will be given by a healthcare provider.Before starting the oral version, you will usually receive a single injection.If you experience any pain or swelling when the IV is injected, tell your caregivers.This medication can interfere with certain medical tests. Inform any doctor that you use Robaxin.Store away from heat and moisture at room temperature. When not in use, keep the bottle tightly shut.

Details on dosage

Adult dose for muscle spasm:

For mild symptoms: 1g IV or IM, once. Then switch to oral
For severe symptoms or conditions postoperative: 1 g IV/IM every 8 hours
Maximum Dose: 3 g per 24 hours
Maximum Duration: Three consecutive days. Repeatable after a 48-hour drug-free period
In the first 48–72 hours, higher doses of the drug are recommended. Then doses can be reduced to 4000 mg/day.
It is not recommended to administer IV/IM for more than three consecutive days without an interval of at least 48 hours.
Use: As a supplement to rest and physical treatment for relief from acute, painful musculoskeletal disorders.

What happens if I miss the dose?

If you are almost due for your next dose, skip the missed one. Never take two doses of the same medicine at once.

What happens if I overdose?

Call 1-800-222-1222 for poison help or seek immediate medical attention.Overdose symptoms may include nausea, extreme drowsiness, fainting, seizures, or coma.

What should be avoided?

Do not drive or engage in any hazardous activities until you have a better understanding of how the medicine will affect you. Drowsiness or dizziness can lead to accidents or serious injuries.Alcohol consumption can have side effects when taken with this medication.

Side effects of Robaxin

If you experience any of the following symptoms of an allergic reaction: hives, difficulty breathing, swelling of your lips, face, tongue, or throat, contact emergency medical assistance immediately.

Call your doctor immediately if:

  • A feeling of lightheadedness, as if you could pass out.
  • Slow heartbeats
  • A seizure;
  • Jaundice
  • Experience pain, bruising or swelling at the site of injection.

Some of the common side effects associated with Robaxin include:

  • Headache, dizziness, drowsiness;
  • Fever;
  • Memory problems and confusion
  • Nausea, vomiting, upset stomach;
  • Double vision, or blurred vision, is another name for this phenomenon.
  • Flushing (warmth, redness, or tingly sensation);
  • Sleep problems (insomnia);
  • Lack of coordination

There may be other side effects.Call your physician if experiencing side effects; alternatively, reach out to the FDA at 1-800-FDA-1088 in order to report potential adverse events.

Interaction with other drug

Do not use Robaxin in combination with drugs that cause sleepiness or slow breathing.Methocarbamol may interact with other drugs, such as prescription and over-the-counter medicines, vitamins, and herbal products. Inform your doctor of all the medicines you are taking and those that you stop or start using.



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