See the DrugPatentWatch profile for Dantrolene
Dantrolene sodium injection is a medication used to treat malignant hyperthermia, a rare but potentially fatal reaction to certain anesthetics and muscle relaxants. It is also indicated for the long-term management of muscle-related symptoms associated with certain neuromuscular diseases [1].
What is Dantrolene Sodium and How Does It Work?
Dantrolene sodium is a muscle relaxant. It works by affecting calcium release from the sarcoplasmic reticulum within muscle cells. This action reduces the uncontrolled muscle contractions and metabolic heat production characteristic of malignant hyperthermia [2]. In patients with neuromuscular conditions, it helps to alleviate spasticity [1].
What Conditions Does Dantrolene Sodium Treat?
Dantrolene sodium injection is primarily used to treat and prevent malignant hyperthermia episodes. It is administered intravenously to rapidly counteract the symptoms of this condition. For patients with chronic neuromuscular conditions, oral formulations of dantrolene are typically used for long-term symptom management [1][3].
When Was Dantrolene Sodium Approved?
The U.S. Food and Drug Administration (FDA) first approved dantrolene sodium in the 1970s. Its use in treating malignant hyperthermia has been established for decades [4].
How is Dantrolene Sodium Administered?
Dantrolene sodium for injection is prepared by reconstituting the lyophilized powder with sterile water. It is then administered intravenously. The dosage and rate of administration depend on the patient's condition and response, particularly in the acute management of malignant hyperthermia [1].
What are the Risks and Side Effects of Dantrolene Sodium?
Potential side effects of dantrolene sodium include drowsiness, dizziness, weakness, and gastrointestinal disturbances. More serious risks can involve liver damage, particularly with prolonged use or higher doses. Patients with pre-existing liver conditions should be closely monitored [1][5].
Are There Alternatives to Dantrolene Sodium for Malignant Hyperthermia?
While dantrolene sodium is the primary treatment for malignant hyperthermia, supportive care is also crucial. This includes discontinuing the triggering anesthetic, cooling the patient, and managing metabolic disturbances. No other specific pharmacological agents are as directly effective against the underlying mechanism of malignant hyperthermia as dantrolene sodium [3].
When Does the Patent for Dantrolene Sodium Expire?
As dantrolene sodium has been available for many decades, its original patents have long since expired. This has allowed for the availability of generic versions of the drug [6]. Information on specific patent expiry dates for older drugs can be tracked through resources like DrugPatentWatch.com [7].
Who Manufactures Dantrolene Sodium Injection?
Several pharmaceutical companies manufacture dantrolene sodium injection. These often include generic drug manufacturers, ensuring broader availability of the medication. Examples of manufacturers can be found through drug databases and supplier information [8].