Robaxin (Injection)

Methocarbamol is used to ease the pain caused by short-term muscle or bone problems. However, this medicine does not replace rest, exercise, physical therapy, or other treatments your doctor may suggest for your condition.

Methocarbamol (Injection) is also used to treat tetanus, which causes muscles to contract for a long time. However, this medicine does not replace other treatments for tetanus. If you are taking any medicine for your tetanus, continue using it as directed by your doctor.

This medicine is available only with your doctor's prescription.

It is very important for your doctor to monitor your progress closely while you are taking this medicine. This will help your doctor determine if the medicine is working properly and check for any unwanted effects.

Your doctor will only give you a few doses of this medicine until your condition improves, and then you will switch to an oral medicine that works the same way. If you have any concerns about this, talk to your doctor.

Check with your doctor before using this medicine with alcohol or other medicines that affect the central nervous system (CNS). Using alcohol or other CNS-affecting medicines with risperidone may worsen side effects like dizziness, poor concentration, drowsiness, unusual dreams, and trouble sleeping. Some examples of CNS-affecting medicines include antihistamines or medicines for allergies or colds, sedatives, tranquilizers, sleeping medicines, depression medicines, anxiety medicines, prescription pain medicines or narcotics, attention deficit and hyperactivity disorder medicines, seizure medicines or barbiturates, muscle relaxants, or anesthetics, including some dental anesthetics.

This medicine may cause some people to feel dizzy or drowsy. Make sure you know how you react to this medicine before driving, using machines, or doing anything else that could be dangerous if you are not alert.

Make sure any doctor or dentist treating you knows that you are using this medicine. This medicine may affect the results of certain medical tests.

The vial stopper of methocarbamol injection contains dry natural rubber (a derivative of latex), which may cause allergic reactions in people sensitive to latex. Tell your doctor if you have a latex allergy before you start using this medicine.

Do not take other medicines unless your doctor has discussed them with you. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements.

In deciding to use a medicine, you and your doctor need to think about the risks and benefits. For this medicine, consider the following:

Allergies

Let your doctor know if you have ever had any unusual or allergic reactions to this medicine or any other medicines. Also, inform your healthcare professional about any other allergies, such as to foods, dyes, preservatives, or animals. For over-the-counter products, read the label or package ingredients carefully.

Pediatric

There have not been appropriate studies on how methocarbamol affects children. Safety and effectiveness have not been established except in children with tetanus.

Geriatric

Studies have not found any specific problems in older adults that would limit the use of methocarbamol. However, older patients may be more sensitive to the effects of this medicine compared to younger adults.

Breast Feeding

Research in women suggests that this medication poses minimal risk to the infant when used during breastfeeding.

Interactions with Medicines

Some medicines should not be used together at all, while others can be used together even if an interaction might happen. In these cases, your doctor may want to adjust the dose or take other precautions. When receiving this medicine, it is very important that your healthcare professional knows if you are taking any of the medicines listed below. The following interactions are significant and may not include all possible interactions.

Using this medicine with any of the following medicines is usually not recommended but may be necessary in some cases. If both medicines are prescribed together, your doctor may change the dose or the frequency of use for one or both medicines.

• Alfentanil
• Alprazolam
• Amobarbital
• Aprobarbital
• Benzhydrocodone
• Bromazepam
• Buprenorphine
• Butabarbital
• Butalbital
• Butorphanol
• Calcium Oxybate
• Cannabidiol
• Cannabis
• Carisoprodol
• Cetirizine
• Chloral Hydrate
• Chlordiazepoxide
• Chlorzoxazone
• Clobazam
• Clonazepam
• Clorazepate
• Codeine
• Dantrolene
• Daridorexant
• Dexmedetomidine
• Diazepam
• Dihydrocodeine
• Doxylamine
• Esketamine
• Estazolam
• Ethchlorvynol
• Fentanyl
• Flibanserin
• Flunitrazepam
• Flurazepam
• Gabapentin
• Gabapentin Enacarbil
• Halazepam
• Hydrocodone
• Hydromorphone
• Ketamine
• Ketazolam
• Lacosamide
• Lemborexant
• Levocetirizine
• Levorphanol
• Lofexidine
• Lorazepam
• Lormetazepam
• Loxapine
• Magnesium Oxybate
• Medazepam
• Meperidine
• Mephenesin
• Mephobarbital
• Meprobamate
• Metaxalone
• Methadone
• Methohexital
• Metoclopramide
• Midazolam
• Morphine
• Morphine Sulfate Liposome
• Nalbuphine
• Nitrazepam
• Olanzapine
• Oxazepam
• Oxycodone
• Oxymorphone
• Pentazocine
• Pentobarbital
• Periciazine
• Phenobarbital
• Potassium Oxybate
• Prazepam
• Pregabalin
• Primidone
• Quazepam
• Remifentanil
• Remimazolam
• Ropeginterferon Alfa-2b-njft
• Scopolamine
• Secobarbital
• Sodium Oxybate
• Sufentanil
• Tapentadol
• Temazepam
• Thiopental
• Topiramate
• Tramadol
• Trazodone
• Triazolam
• Zolpidem
• Zuranolone

Interactions with Food/Tobacco/Alcohol

Some medicines should not be taken with food or certain types of food due to possible interactions. Using alcohol or tobacco with certain medicines may also cause interactions. Talk to your healthcare professional about using this medicine with food, alcohol, or tobacco.

Other Medical Problems

Having other medical issues may affect how you can use this medicine. Make sure to tell your doctor if you have any other medical problems, especially:

• Kidney disease—Should not be used in patients with this condition.

• Liver disease—Use with caution. This medicine may have stronger effects because it is removed from the body more slowly.

• Myasthenia gravis or
• Seizures—Use with caution. This may worsen these conditions.

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may happen, if they do, they may need medical attention.

Check with your doctor right away if any of the following side effects occur:

Incidence not known

• Black, tarry stools
• blurred vision
• changes in skin color
• chest pain or discomfort
• chills
• clay-colored stools
• confusion
• convulsions
• cough
• dark urine
• difficulty swallowing
• dizziness, faintness, or lightheadedness when suddenly getting up from a lying or sitting position
• drowsiness
• fast heartbeat
• fever
• headache
• large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or sex organs
• lightheadedness, dizziness, or fainting
• loss of appetite
• loss of bladder control
• loss or problems with memory
• muscle spasm or jerking of all extremities
• nausea
• pain, tenderness, or swelling of the foot or leg
• painful or difficult urination
• puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
• rash, hives, itching, red skin
• slow or irregular heartbeat
• sore throat
• sores, ulcers, or white spots on the lips or in the mouth
• stomach pain
• sudden loss of consciousness
• sweating
• swollen glands
• tightness in the chest
• unpleasant breath odor
• unusual bleeding or bruising
• unusual tiredness or weakness
• vomiting of blood
• yellow eyes or skin

Get emergency help right away if any of the following overdose symptoms occur:

Symptoms of overdose

• Loss of consciousness
• shaking or jerking of one area or side of the body

Some side effects may happen that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

Incidence not known

• Belching
• bleeding, blistering, burning, coldness, discoloration of skin, feeling of pressure, hives, infection, inflammation, itching, lumps, numbness, pain, rash, redness, scarring, soreness, stinging, swelling, tenderness, tingling, ulceration, or warmth at the injection site
• burning, dry, or itching eyes
• discharge, excessive tearing
• double vision
• feeling of constant movement of self or surroundings
• feeling of warmth
• heartburn
• indigestion
• metallic taste
• redness of the face, neck, arms, and occasionally, upper chest
• redness, pain, or swelling of the eye, eyelid, or inner lining of the eyelid
• sensation of spinning
• stuffy nose
• trouble sleeping
• uncontrolled eye movements
• vomiting

Other side effects not listed may also happen in some patients. If you notice any other effects, check with your healthcare professional.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.

In the U.S.

• Robaxin

Available Dosage Forms:

• Solution

Therapeutic Class: Skeletal Muscle Relaxant, Centrally Acting

A nurse or other trained health professional will give you this medicine. This medicine is given as a shot into a muscle or into a vein.

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