Proper Use of This Medicine

If you are unable to swallow the capsules, you may empty the number of capsules needed for one dose into a small amount of fruit juice or other liquid. Stir gently to mix the powder with the liquid before drinking. Drink the medicine right away. Rinse the glass with a little more liquid and drink that also to make sure that you have taken all of the medicine.

Dantrolene may be taken with or without food or on a full or empty stomach. However, if your doctor tells you to take the medicine a certain way, take it exactly as directed.

Take this medicine only as directed by your doctor . Do not take more of it and do not take it more often than your doctor ordered. Dantrolene may cause liver damage or other unwanted effects if too much is taken.

Dosing—The dose of dantrolene 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 dantrolene. If your dose is different, do not change it unless your doctor tells you to do so:

The number of capsules 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 taking dantrolene.

• For oral dosage form (capsules):
  • For prevention or treatment of a malignant hyperthermic crisis:
    • Adults—Dose is based on body weight and must be determined by your doctor. The usual dose is 4 to 8 milligrams (mg) per kilogram (kg) (1.8 to 3.6 mg per pound) of body weight. The doctor will instruct you exactly when and how often to take your medicine.
  • To relieve spasms:
    • Adults—To start, 25 mg once a day. The doctor may increase your dose as needed and tolerated. However, the dose is usually not more than 100 mg four times a day.
    • Children—Dose is based on body weight and must be determined by your doctor. To start, the dose is usually 0.5 mg per kg (0.23 mg per pound) of body weight twice a day. The doctor may increase the dose as needed and tolerated. However, the dose is usually not more than 3 mg per kg or 100 mg four times a day.
• For injection dosage form:
  • For prevention or treatment of a malignant hyperthermia crisis:
    • Adults, teenagers, and children—Dose is based on body weight and must be determined by your doctor.

Missed dose—If you miss a dose of this medicine and remember within an hour or so of the missed dose, take it right away. Then go back to your regular dosing schedule. But if you do not remember until later, skip the missed dose and go back to your regular dosing schedule. Do not double doses.

Storage—To store this medicine:

• Keep out of the reach of children.
• Store away from heat and direct light.
• Do not store this medicine in the bathroom, near the kitchen sink, or in other damp places. Heat or moisture may cause the medicine to break down.
• Do not keep outdated medicine or medicine no longer needed. Be sure that any discarded medicine is out of the reach of children.