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What is it? Overview Usage Side Effects and Warnings

Dantrolene Overview

Written by FoundHealth.

(DAN troe leen)

U.S. Brand Names


Canadian Brand Names


Pharmacologic Category

Skeletal Muscle Relaxant

What key warnings should I know about before taking this medicine?

• This medicine may cause liver problems especially when high doses are used. The risk is greatest in females, patients older than 35 years of age, and patients taking other medicines. Your healthcare provider will be watching your liver tests. Using the smallest dose possible decreases the risk of liver problems. If you do not see an improvement in your symptoms after 45 days of use, talk with healthcare provider.

Reasons not to take this medicine

• If you have an allergy to dantrolene or any other part of this medicine.

• Tell healthcare provider if you are allergic to any medicine. Make sure to tell about the allergy and how it affected you. This includes telling about rash; hives; itching; shortness of breath; wheezing; cough; swelling of face, lips, tongue, or throat; or any other symptoms involved.

• If you are breast-feeding.


• If you have liver disease.

• If spasticity helps you keep your balance.

How does it work?

• Dantrolene works through the brain to relieve pain.

How is it best taken?

• Take this medicine with or without food. Take with food if it causes an upset stomach.

• This medicine is used in combination with rest, physical therapy, pain medicine, and other therapies.


• The medicine is given as a shot into a vein.

What do I do if I miss a dose? (does not apply to patients in the hospital)

• Take a missed dose as soon as possible.

• If it is almost time for the next dose, skip the missed dose and return to your regular schedule.

• Do not take a double dose or extra doses.

• Many times this medicine is taken on an as needed basis.

What should I monitor?

• Change in condition being treated. Is it better, worse, or about the same?

How should I store this medicine?

• Store at room temperature.

• Protect capsules from moisture. Do not store in a bathroom or kitchen.

• The injection will be given to you in a healthcare setting. You will not store it at home.

General statements

• If you have a life-threatening allergy, wear allergy identification at all times.

• Do not share your medicine with others and do not take anyone else's medicine.

• Keep all medicine out of the reach of children and pets.

• Most medicines can be thrown away in household trash after mixing with coffee grounds or kitty litter and sealing in a plastic bag.

• Keep a list of all your medicines (prescription, natural products, supplements, vitamins, over-the-counter) with you. Give this list to healthcare provider (doctor, nurse, nurse practitioner, pharmacist, physician assistant).

• Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or in Canada to Health Canada's Canada Vigilance Program at 1-866-234-2345.

• Talk with healthcare provider before starting any new medicine, including over-the-counter, natural products, or vitamins.

Created: 2006-10-13 11:46:18.0

Modified: 2010-05-14 09:45:08.0

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