Robaxisal Extra Strength (Methocarbamol/ASA)

Prescription Prescription Required     Customer Reviews
Robaxisal Extra Strength Brand
Dosage Quantity & Price
Methocarbamol/ASA (Generic alternate to Robaxisal Extra Strength) Generic

We don't sell this generic-version medication.

  • We are Certified
  • Cipa Certified Canadian
  • Norton Shopping Guarantee
  • 5 Star Excellence award from Shopper Approved for collecting at least 100 5 star reviews

Table of contents:

Robaxisal Extra Strength is a medication used to treat back pain, muscle spasms, tense neck muscles, strains, and sprains. It has a dual-acting formula that contains an analgesic (acetylsalicylic acid) to relieve pain and a muscle relaxant (methocarbamol) to get to the source of pain. It contains two active ingredients: 500 mg of acetylsalicylic acid (ASA) to relieve pain and 400 mg of methocarbamol to relax tense back muscles.

Methocarbamol is a muscle relaxant that is used to treat muscle spasms and pain, while aspirin is a nonsteroidal anti-inflammatory drug (NSAID) that helps to decrease pain and inflammation. Together, these two drugs work to relieve pain and muscle spasms.

Use and Dosage

Robaxisal Extra Strength is an oral medication that comes in the form of caplets that are meant to be taken orally. It can be taken with or without food. The dosage and duration of treatment with Robaxisal Extra Strength should be determined by a doctor or healthcare provider.

To use Robaxisal Extra Strength Caplets, take 2 caplets with a glass of water or milk every 6 hours. Do not take more than 8 caplets in 24 hours. It should be used only on the advice of a physician, and you should use the smallest effective dose. Follow the instructions on the label and the advice of your healthcare provider when taking any medication.

If you miss a dose of Robaxisal Extra Strength, take it as soon as you remember. However, if it is almost time for your next dose, skip the missed dose and continue with your regular dosing schedule. Do not take a double dose to make up for a missed one.

Side Effects

Common Side Effects of Robaxisal Extra Strength (Methocarbamol/ASA):

  • Diarrhea
  • Dizziness
  • Heartburn
  • Dry mouth
  • Blurred vision
  • Confusion
  • Constipation
  • Dizziness
  • Double vision
  • Drowsiness
  • Eye redness
  • Flushing (warmth redness or tingly feeling)
  • Headache
  • Itching
  • Lightheadedness
  • Loss of balance or coordination
  • Memory problems
  • Nausea
  • Sleep problems (insomnia)
  • Spinning sensation
  • Stomach upset
  • Stuffy nose
  • Vomiting

Serious Side Effects of Robaxisal Extra Strength (Methocarbamol/ASA):

  • Anaphylaxis
  • Chills
  • Confusion
  • Feeling like you might pass out
  • Fever
  • Flu symptoms
  • Jaundice (yellowing of your skin or eyes)
  • Lightheadedness
  • Liver problems
  • Seizures (convulsions)
  • Serious eye symptoms such as sudden vision loss, blurred vision, tunnel vision, eye pain or swelling, or seeing halos around lights
  • Serious heart symptoms such as:
    • Fast, irregular, or pounding heartbeats
    • Fluttering in your chest
    • Shortness of breath
    • Sudden dizziness, lightheartedness, or passing out
    • Severe headache, confusion, slurred speech, arm or leg weakness, trouble walking, loss of coordination, feeling unsteady, very stiff muscles, high fever, profuse sweating, or tremors
    • Slow heart rate

Forms and Strength

Robaxisal Extra Strength (Methocarbamol/ASA) is available in the following forms and strength:

Robaxisal Extra Strength: Caplet

  • 400/500 mg


  • It should not be taken by individuals who are allergic to acetylsalicylic acid (ASA), methocarbamol, or any of the other ingredients in the product.
  • Robaxisal Extra Strength may cause drowsiness or dizziness, and people should avoid driving or using heavy machinery until they know how the medication affects them.
  • Methocarbamol in Robaxisal Extra Strength may affect kidney function, and it should be used with caution in patients with renal (kidney) impairment.
  • ASA in Robaxisal Extra Strength may interact with other medications such as blood thinners and may increase the risk of gastrointestinal bleeding.
  • Robaxisal Extra Strength should not be taken during pregnancy, particularly during the third trimester, unless the potential benefits outweigh the risks. It may also pass into breast milk, so it should not be taken while breastfeeding without consulting a healthcare professional.
  • Robaxisal Extra Strength may cause stomach upset, and people with a history of stomach ulcers or other gastrointestinal problems should use it with caution and under the advice of a healthcare provider.
  • ASA in Robaxisal Extra Strength may increase the risk of bleeding, and it should be used with caution in patients with bleeding disorders or who are taking blood-thinning medications.
  • Methocarbamol in Robaxisal Extra Strength may cause liver damage, and it should be used with caution in patients with liver disease or impaired liver function.
  • Robaxisal Extra Strength may interact with other medications, including antidepressants, tranquilizers, and other muscle relaxants. Inform the healthcare provider of all medications, vitamins, and supplements being taken to avoid potential drug interactions.
  • Robaxisal Extra Strength should be used with caution and only under the direction of a healthcare provider in individuals with a history of alcohol or drug abuse.

Frequently Asked Questions (FAQ)

How long does it take for Robaxisal Extra Strength to start working?

The onset of action for Robaxisal Extra Strength may vary, but it typically starts working within 30 minutes to 1 hour after taking the medication.

Can I take Robaxisal Extra Strength with other medications?

Talk to your healthcare provider or pharmacist before taking Robaxisal Extra Strength with other medications. It may interact with other drugs, including blood thinners, other pain relievers, and muscle relaxants.


It's important to purchase Robaxisal Extra Strength from verified Canadian pharmacy.

Additional information

Generic name:






Quantities Available:

18, 40