Dantrolene (Systemic)

Brand Names : Dantrium, Dantrium Intravenous

Side Effects of This Medicine

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention. Serious side effects are very rare when dantrolene is taken for a short time (for example, when it is used for a few days before, during, or after surgery or anesthesia to prevent or treat malignant hyperthermia). However, serious side effects may occur, especially when the medicine is taken for a long time.

Check with your doctor immediately if any of the following side effects occur:

Less common

Convulsions (seizures); pain, tenderness, changes in skin color, or swelling of foot or leg; shortness of breath or slow or troubled breathing

Also, check with your doctor as soon as possible if any of the following side effects occur:

Less common

Bloody or dark urine; chest pain; confusion; constipation (severe); diarrhea (severe); difficult urination; mental depression; skin rash, hives, or itching; yellow eyes or skin

Other side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. However, check with your doctor if any of the following side effects continue or are bothersome:

More common

Diarrhea (mild); dizziness or lightheadedness; drowsiness; general feeling of discomfort or illness; muscle weakness; nausea or vomiting; unusual tiredness

Less common

Abdominal or stomach cramps or discomfort; blurred or double vision or any change in vision; chills and fever; constipation (mild); difficulty in swallowing; frequent urge to urinate or uncontrolled urination; headache; loss of appetite; slurring of speech or other speech problems; sudden decrease in amount of urine; trouble in sleeping; unusual nervousness

Other side effects not listed above may also occur in some patients. If you notice any other effects, check with your doctor.