Know the basics
What is orphenadrine used for?
Orphenadrine is a muscle relaxant. It works by blocking nerve impulses (or pain sensations) that are sent to your brain.
Orphenadrine is used together with rest and physical therapy to treat skeletal muscle conditions such as pain or injury.
Orphenadrine may also be used for other purposes not listed in this medication guide.
How should I take orphenadrine?
Take this medication exactly as it was prescribed for you. Do not take the medication in larger amounts, or take it for longer than recommended by your doctor. Follow the directions on your prescription label.
Take this medicine with a full glass of water.
Do not crush, chew, or break the extended-release tablet. Swallow the pill whole. Breaking or crushing the pill may cause too much of the drug to be released at one time.
Orphenadrine is only part of a complete program of treatment that may also include rest, physical therapy, or other pain relief measures. Follow your doctor’s instructions.
Orphenadrine may be habit-forming and should be used only by the person it was prescribed for. Orphenadrine should never be given to another person, especially someone who has a history of drug abuse or addiction. Keep the medication in a secure place where others cannot get to it.
How do I store orphenadrine?
Orphenadrine is best stored at room temperature away from direct light and moisture. To prevent drug damage, you should not store orphenadrine in the bathroom or the freezer. There may be different brands of orphenadrine that may have different storage needs. It is important to always check the product package for instructions on storage, or ask your pharmacist. For safety, you should keep all medicines away from children and pets.
You should not flush orphenadrine down the toilet or pour them into a drain unless instructed to do so. It is important to properly discard this product when it is expired or no longer needed. Consult your pharmacist for more details about how to safely discard your product.
Know the precautions & warnings
What should I know before using orphenadrine?
In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For this medicine, the following should be considered:
The dose of this medicine will be different for different patients. Follow your doctor’s orders or the directions on the label. The following information includes only the average doses of this medicine. If your dose is different, do not change it unless your doctor tells you to do so.
The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.
Appropriate studies have not been performed on the relationship of age to the effects of orphenadrine in the pediatric population. Safety and efficacy have not been established.
No information is available on the relationship of age to the effects of orphenadrine in geriatric patients. However, elderly patients are more likely to have age-related heart, liver, or kidney problems which may require caution in patients receiving orphenadrine.
Is it safe to take orphenadrine during pregnancy or breast-feeding?
There are no adequate studies in women for determining risk when using this medication during pregnancy or while breastfeeding. Please always consult with your doctor to weigh the potential benefits and risks before taking this medication.
Know the side effects
What are the side effects of orphenadrine?
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Stop using orphenadrine and call your doctor at once if you have any of these serious side effects:
- fast, pounding, or uneven heartbeats;
- confusion, anxiety, agitation, tremors, hallucinations;
- seizure (convulsions); or
- urinating less than usual or not at all.
Less serious side effects may include:
- dry mouth or throat;
- blurred vision, dilated pupils;
- drowsiness, dizziness;
- nausea, vomiting, constipation; or
Not everyone experiences these side effects. There may be some side effects not listed above. If you have any concerns about a side-effect, please consult your doctor or pharmacist.
Know the interactions
What drugs may interact with orphenadrine?
Orphenadrine may interact with other drugs that you are currently taking, which can change how your drug works or increase your risk for serious side effects. To avoid any potential drug interactions, you should keep a list of all the drugs you are using (including prescription drugs, nonprescription drugs and herbal products) and share it with your doctor and pharmacist. For your safety, do not start, stop, or change the dosage of any drugs without your doctor’s approval.
Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. Tell your healthcare professional if you are taking any other prescription or nonprescription (over-the-counter [OTC]) medicine.
Using this medicine with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.
- Morphine Sulfate Liposome
- Sodium Oxybate
Does food or alcohol interact with orphenadrine?
Orphenadrine may interact with food or alcohol by altering the way the drug works or increase the risk for serious side effects. Please discuss with your doctor or pharmacist any potential food or alcohol interactions before using this drug.
What health conditions may interact with orphenadrine?
Orphenadrine may interact with your health condition. This interaction may worsen your health condition or alter the way the drug works. It is important to always let your doctor and pharmacist know all the health conditions you currently have, especially:
- Enlarged esophagus or
- Enlarged prostate or
- Glaucoma or
- Intestinal blockage or
- Myasthenia gravis or
- Stomach ulcer or
- Urinary tract blockage—Orphenadrine should not be used in patients with these conditions.
- Heart problems (e.g., fast or irregular heartbeats, heart failure)—Use with caution. Orphenadrine may worsen these conditions.
Understand the dosage
The information provided is not a substitute for any medical advice. You should ALWAYS consult with your doctor or pharmacist before using this medication.
What is the dose of orphenadrinefor an adult?
Acute musculoskeletal conditions:
100 mg orally twice a day (morning and evening).
60 mg by intramuscular or intravenous injection. May repeat every 12 hours.
Quinine-resistant leg cramps:
100 mg orally at bedtime.
What is the dose of orphenadrinefor a child?
The dosage has not been established in pediatric patients. It may be unsafe for your child. It is always important to fully understand the safety of the drug before using. Please consult with your doctor or pharmacist for more information.
What should I do in case of an emergency or overdose?
In case of an emergency or an overdose, call your local emergency services or go to your nearest emergency room.
What should I do if I miss a dose?
If you miss a dose of orphenadrine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and take your regular dose as scheduled. Do not take a double dose.
Hello Health Group does not provide medical advice, diagnosis or treatment.
Review Date: May 30, 2016 | Last Modified: December 19, 2019
Orphenadrine. https://www.drugs.com/cdi/orphenadrine.html. Accessed July 14, 2016.
Orphenadrine. http://www.webmd.com/drugs/2/drug-18031/orphenadrine-citrate-oral/details. Accessed July 14, 2016.
Orphenadrine. https://medlineplus.gov/druginfo/meds/a682162.html. Accessed July 14, 2016.