Robaxin is a trading name of Methocarbamol, which has been sold under it. The drug is used for the short-term treatment of musculoskeletal pain, which affects bones, joints, ligaments, tendons, or muscles. 

It was approved in the year 1957 in the United States for medical use. In 2018, the drug was the 120th most commonly prescribed medication in the U.S, with over 5 million prescriptions. 

Robaxin and Soma are muscle relaxants used to treat acute, painful musculoskeletal conditions. Robaxin injections have beneficial effects in the control of neuromuscular spasms caused by tetanus.

The drug is used along with other physical therapy & other treatment and may work by causing drowsiness & helping to relax the muscles.  The mechanism of action of Robaxin has not yet been fully established in humans.

Robaxin takes around 30 minutes to start working in your body and peaks within 2 hours.  The lasting effect maybe 4 hours, but it also depends on person to person. The drug may stay longer in a person who is 50 years of age or more than that. 

Dosage

Robaxin comes in the form of tablets and injections.  The dosage may vary from person to person depending on factors like age, gender, medical history, conditions, etc.  The amount of dosage will be directed by your physician after examining you and your medical conditions. 

Dosages and frequency of injections should be based on the condition being treated & the healing response. Higher dosages are recommended in the first 48 to 72 hours of treatment, and then the dosages could be gradually reduced to 4000mg per day. IV/IM therapy should not be administered without a drug-free interval of 48 hours.

For Moderate Symptoms:

Switch to oral after the initial dose of 1 g IV or IM.

For severe symptoms or post-operative conditions:

1 g IV or IM after every 8 hours. 

Maximum dose: 

3g in 24 hours.

Maximum duration:

3 consecutive days, may repeat a drug-free dose after the interval of 48 hours. 

Using Robaxin exactly as directed on the label or as prescribed by the healthcare physician is always recommended. Do not take additional dosages or for longer than prescribed. Follow the instructions & use the medicine exactly as directed. 

Side effects of Robaxin

Robaxin has been associated with a number of adverse effects. Some events may be due to an overly rapid rate of intravenous injection.

Common Robaxin side effects may include:

  • headache, dizziness, drowsiness
  • fever
  • confusion, problems with memory
  • nausea, vomiting, upset stomach
  • blurred vision, double vision
  • flushing (warmth, redness, or tingly feeling)
  • sleep problems (insomnia)
  • Lack of coordination

Side effects on the whole body: Anaphylactic reaction, angioneurotic edema, fever, headache

Side effects on the cardiovascular system: Bradycardia, flushing, hypotension, syncope, thrombophlebitis

Side effects on the Digestive system: Dyspepsia, jaundice (including cholestatic jaundice), nausea, and vomiting. 

Side effect on Hemic and lymphatic system: Leukopenia. 

Side effect on the Immune system: Hypersensitivity reactions

Side effects on the Nervous system: Amnesia, confusion, diplopia, dizziness or light-headedness, drowsiness, insomnia, mild muscular incoordination, nystagmus, sedation, seizures, vertigo. 

Side effects on Skin and special senses: Blurred vision, conjunctivitis, nasal congestion, metallic taste, pruritus, rash, and urticaria. 

If any of the side effects gets worsen or do not go away easily, visit your health care provider on an immediate basis. Also, the above list does not consist of all the side effects, if you experience any other side effects, do not hesitate to get medical assistance and treat it as soon as possible. Ask your physician about the complete and updated list of side effects. 

Drug Interactions

Robaxin can be dangerous if mixed with other drugs that make you drowsy or slow your breathing. Before taking this medication, ask a doctor about any interactions with sleeping pills, muscle relaxers, and anxiety/seizure medications.

Taking Robaxin with other drugs may cause severe or life-threatening side effects. Robaxin interacts with over-the-counter and prescription medicines, vitamins, and herbal products. Make sure to tell your healthcare physicians about all the medication you are taking in case of an interaction that could be dangerous for your health.

Precautions to be taken while using Robaxin

Before taking methocarbamol, tell your doctor or pharmacist if you are allergic to it or have any other allergies. This product contains inactive ingredients that can cause allergic reactions and be harmful otherwise. Before using Robaxin, it is vital to inform your doctor or pharmacist of all medical history, especially liver disease. 

Be careful while you are taking Robaxin. It may make you dizzy and drowsy, which can affect your vision. Drinking alcohol or taking marijuana (cannabis) can make it more dangerous to use the medication. If you do, please avoid driving and doing anything that requires alertness until further notice from your doctor.

Before having surgery, tell your doctor or dentist about all the products you use. It includes prescription drugs, nonprescription drugs, and herbal products alike so that they can better assess any possible drug interactions.

Is Robaxin safe during Pregnancy and Breastfeeding

Robaxin should not be used during pregnancy unless a physician deems it necessary. It has been reported that fetal abnormalities may result from methocarbamol exposure, and thus the safety of use is uncertain in the early stages of embryogenesis. Hence, methocarbamol tablets should not be used in women who may become pregnant, particularly during early pregnancy, unless the potential benefits outweigh the possible hazards.

Since Robaxin is excreted in dog milk, it may also be present in human breastmilk, which means that breastfeeding mothers should use caution when administering the medication to themselves. Robaxin may negatively affect breastfeeding infants, so it’s best to avoid taking Robaxin if you are nursing.

How to get Robaxin online?

You can buy Robaxin online using a valid doctor’s prescription from a legitimate pharmacy. While there are plenty of authentic pharmacies that sell medications online, you need to beware and cautious of fraudulent pharmacies that may sell counterfeit medications, especially if they do not necessarily require a prescription from you.

Conclusion

Robaxin belongs to the drug class of Skeletal muscle relaxants also used in the treatment of tetanus. 

If you or your physician decides to put you on this medication, kindly follow your physician’s directions. Know everything about the drug regarding the side effects, warnings, etc. 

Do not intimate to ask your queries to your doctor. The drug may not be effective for everyone, so do not hide your past or present medical condition to your doctor. 

References

  1. Forsyth, H.F., 1958. Methocarbamol (Robaxin) in orthopedic conditions: Preliminary report of one hundred cases. Journal of the American Medical Association167(2), pp.163-168. Available at: https://jamanetwork.com/journals/jama/article-abstract/323874 Accessed on 10/09/2021
  2. MOONEY, H.B., COHEN, S., DITMAN, K.S. and WHITTLESEY, J.R., 1961. Methocarbamol (Robaxin®) In the Treatment of Alcoholics. The Journal of new drugs1(6), pp.276-278. Available at: https://accp1.onlinelibrary.wiley.com/doi/abs/10.1177/009127006100100607 Accessed on 10/09/2021