Skip to content
The Health Depot acquired by Green Shield Holdings (click here)
The Health Depot acquired by Green Shield Holdings (click here)
Health Store Pharmacy Health Education My Meds
Additional Info
Robaxisal Extra Strength contains two active ingredients: 500 mg acetylsalicylic acid (ASA) to relieve back pain and 400 mg methocarbamol to relax tense back muscles.
Medicinal Ingredients: Methocarbamol 400 mg, Acetylsalicylic acid 500 mg. Non-Medicinal Ingredients: Corn starch, hypromellose, magnesium stearate, methylcellulose, modified starch, polyethylene glycol, povidone, sodium lauryl sulfate, sodium starch glycolate, stearic acid.
There is enough drug in this package to seriously harm a child. Keep all medicine safely away from children. Do not take more than the recommended dose unless your doctor tells you to. Talk to your doctor before you take this medication if you: have asthma; are allergic to acetylsalicylic acid, salicylates, methocarbamol or to any of the listed ingredients; suffer from stomach problems, peptic ulcers, liver disease, gout, blood coagulation defects, or anemia; are pregnant or nursing; are having surgery in five to seven days; are taking other pain relievers; are taking any prescription drug. Ask your doctor about Reye’s Syndrome, a rare and serious illness, before giving this medication to a child or teenager who has chicken pox or flu symptoms. Stop use and contact your doctor if after taking this medication, you have: bleeding or irritation of the stomach, nausea, vomiting, pain, any loss of hearing, including ringing or buzzing in the ears, trouble breathing, rash, hives or itching. May cause drowsiness or dizziness. Use caution when operating machinery or motor vehicles. Do not drink alcohol. Talk to your doctor if you still have symptoms after 5 days. If you take too much medicine by mistake, call your doctor or Poison Control Centre right away even if you have no symptoms.
Adult Dosage: Adult Dosage: Take 1-2 caplets, every 6 hours. Do not exceed 8 caplets in 24 hours. Use only on the advice of a doctor. Caution: muscle relaxants like methocarbamol can cause side effects such as drowsiness, dizziness, lightheadedness, stomach upset, nausea/vomiting, or blurred vision. If any of these effects persist or worsen, tell your doctor or pharmacist promptly. Talk to your doctor or one of our pharmacists to see if this medication is right for you.
Muscle relaxants, like methocarbamol in Robaxisal, can interact with other medications, vitamins, or herbs you may be taking. An interaction is when a substance changes the way another medication works. This can be harmful or prevent the medications from working well.

To help avoid interactions, speak with your doctor or one of pharmacists. We can limit potential medications interactions with care by helping to personalize medications to you. Be sure to tell our pharmacists about all medications, vitamins, or herbs you’re taking. To find out how this drug might interact with something give one of our pharmacists a call.

Alcohol interaction:
Drinking alcohol can increase the sedating effect of this drug and many others. If you drink alcohol, it is important to let your doctor and our pharmacy team know.

Interactions that increase the risk of side effects:
Taking Robaxisal with certain drugs that also cause drowsiness raises your risk of this side effect. Examples of these drugs include:

Anxiety drugs: such as lorazepam, diazepam, clonazepam, or alprazolam.
Pain killers: particularly opiates such as oxycodone, hydromorphone, hydrocodone, tramadol, codeine or morphine.
Certain antidepressants: such as amitriptyline, nortriptyline, doxepin, and imipramine.
Antipsychotics: such as chlorpromazine, haloperidol, ripseridone, olanzapine or quetiapine
Over-the-counter products: such as kava-kava, valerian root, gravol (dimenhydrinate) or Benadryl (diphenhydramine).

*This is few examples of potential interactions. If you would like to learn more about if Robaxisal is right for you please speak to one of our pharmacy team members

Warnings for other groups:
For pregnant women: Methocarbamol found in Robaxisal is a category C pregnancy drug. That means two things:

Research in animals has shown adverse effects to the fetus when the mother takes the drug.
There haven’t been enough studies done in humans to be certain how the drug might affect the fetus.
Talk to your doctor if you’re pregnant or planning to become pregnant. This drug should be used only if the potential benefit justifies the potential risk to the fetus.

For women who are breastfeeding: Methocarbamol may pass into breast milk and may cause side effects in a child who is breastfed. Talk to your doctor if you breastfeed your child. You may need to decide whether to stop breastfeeding or stop taking this medication.

For seniors: The kidneys of older adults may not work as well as they used to. This can cause your body to process drugs more slowly. As a result, more of a drug stays in your body for a longer time. This raises your risk of side effects. It may be wise to start on a lower dose or a different dosing schedule. This can help keep levels of this drug from building up too much in your body.

For children: This medication should not be used in people younger than 16 years of age.

Similar Products