Myotonia congenita

How might myotonia congenita be treated?

Treatment for myotonia congenita depends on the symptoms and severity in each person. People with mild symptoms may just need to modify their activities. Those with more severe muscle stiffness might consider or need sodium channel blockers or other medications to relieve symptoms. Medication options may include:

  • Mexiletine - this is a sodium channel blocker and is the best documented treatment option. It may significantly reduce muscle stiffness.
  • Phenytoin or carbamazepine - these are anticonvulsants that have been reported to help symptoms in some people.
  • Quinine (an antimalarial), dantrolene (a muscle relaxant), or acetazolamide (a diuretic) may help symptoms in some cases.

Exercise is known to temporarily relieve myotonia. Some people with myotonia congenita have reported more long-term relief with gymnastics, but this has not been studied in controlled trials. Anesthesia should be used with caution in people with myotonia congenita.

Last updated on 05-01-20

Where To Start

Muscular Dystrophy Association

Muscular Dystrophy Association has information and resources about Myotonia congenita. Please click on the link to access this resource.

Last updated on 04-27-20

Name: Muscular Dystrophy Family Foundation P.O. Box 776
Carmel, IN, 46082, United States
Phone: +1-317-615-9140 Email: Url: MDFF provides financial assistance, quality programs and services for the Muscular Dystrophy community in Indiana.
Name: European Alliance of Neuromuscular Disorders Associations MDG Malta 4 Gzira Road
Gzira, Intl GAR 04
Phone: 003-56 -21 346688 Email: Url:
Name: Neuromuscular Disease Foundation 269 South Beverly Drive, Suite 1206
Beverly Hills, CA, 90212 , United States
Phone: 310-736-2978 Url:
Name: Muscular Dystrophy Association MDA 222 S Riverside Plaza Suite 1500
Chicago, IL, 60606, United States
Toll Free: 1-833-275-6321 (Helpline) Email: Url:

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