Dantrolene (By mouth)
Skeletal Muscle Relaxant, Direct Acting (About this – PubMed Health)
Uses of This Medicine
Dantrolene is used to help relax certain muscles in your body. It relieves the spasms, cramping, and tightness of muscles caused by certain medical problems such as multiple sclerosis (MS), cerebral palsy, stroke, or injury to the spine. Dantrolene does not cure these problems, but it may allow other treatment, such as physical therapy, to be more helpful in improving your condition. Dantrolene acts directly on the muscles to produce its relaxant effects.
Dantrolene is also used to prevent or treat a medical problem called malignant hyperthermia that may occur in some patients during or following surgery or anesthesia. Malignant hyperthermia consists of a group of symptoms including very high fever, fast and irregular heartbeat, and breathing problems. It is believed that the tendency to develop malignant hyperthermia is inherited.
This medicine is available only with your doctor’s prescription.
Other uses (PubMed Health)
How To Use
Take your medicine as directed. Your dose may need to be changed several times to find what works best for you.
Missed dose: Take a dose as soon as you remember. If it is almost time for your next dose, wait until then and take a regular dose. Do not take extra medicine to make up for a missed dose.
Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light.
Drugs and Foods to Avoid
Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.
Some medicines can affect how dantrolene works. Tell your doctor if you are also using any of the following:Estrogen Heart or blood pressure medicine
When Not To Use
This medicine can cause the following problems:Liver problems
Your doctor will do lab tests at regular visits to check on the effects of this medicine. Keep all appointments.
This medicine may make you dizzy or drowsy. Do not drive or do anything else that could be dangerous if you are not alert.
Keep all medicine out of the reach of children. Never share your medicine with anyone.
Possible side effects
Summary More details
Call your doctor right away if you notice any of these side effects:
Fast, pounding, or uneven heartbeat, chest pain, trouble breathing
If you notice these less serious side effects, talk with your doctor:
Dizziness, drowsiness, lightheadedness
Muscle weakness, tiredness
If you notice other side effects that you think are caused by this medicine, tell your doctor.
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
More side effects of this drug
Brand names include
There may be other brand names for this medicine.