dantrolene Health Article

What are the possible side effects of dantrolene?

If you experience any of the following serious side effects, stop taking dantrolene and seek emergency medical attention:

• an allergic reaction (difficulty breathing; closing of your throat; swelling of your lips, tongue, or face; or hives);

• a rash or itching;

• black, bloody, or tarry stools or severe diarrhea;

• yellow skin or eyes; or

• seizures.

Other, less serious side effects may be more likely to occur. Continue to take dantrolene and talk to your doctor if you experience

• drowsiness, dizziness, weakness or fatigue;

• diarrhea, constipation, upset stomach, or decreased appetite;

• difficulty swallowing (use caution to prevent choking);

• headache or insomnia;

• depression or confusion;

• blurred or abnormal vision; or

• increased urination.

Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.

What other drugs will affect dantrolene?

Dantrolene may increase the effects of other drugs that cause drowsiness, including antidepressants, alcohol, antihistamines, sedatives (used to treat insomnia), pain relievers, anxiety medicines, and other muscle relaxants. Tell your doctor about all medicines that you are taking, and do not take any medicine unless your doctor approves.

Drugs other than those listed here may also interact with dantrolene. Talk to your doctor and pharmacist before taking any prescription or over-the-counter medicines.

Where can I get more information?

Your pharmacist has more information about dantrolene written for health professionals that you may read.

What does my medication look like?

Dantrolene is available with a prescription under the brand name Dantrium. Other brand or generic formulations may also be available. Ask your pharmacist any questions you have about this medication, especially if it is new to you.

• Dantrium 25 mg--orange/light-brown capsules

• Dantrium 50 mg--orange/dark-brown capsules

• Dantrium 100 mg--orange/light-brown capsules

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.