Chemically, dantrolene is a hydantoin derivative, but does not exhibit antiepileptic activity like other hydantoin derivates such as phenytoin.

Medicinal name:
  • Dantrolene Sodium 100 MG Oral Capsule [Dantrium]
  • Dantrolene Sodium 50 MG Oral Capsule [Dantrium]
  • Dantrolene Sodium 25 MG Oral Capsule [Dantrium]

Dantrium - Pharmacology:

Dantrium depresses excitation-contraction coupling in skeletal muscle by binding to the ryanodine receptor 1, and decreasing intracellular calcium concentration. Ryanodine receptors mediate the release of calcium from the sarcoplasmic reticulum, an essential step in muscle contraction.

Dantrium mini report

Dantrium NDA
NDA - A product marketed under an approved New Drug Application
Dantrium ORAL
Dantrium CAPSULE
Start - Stop data
Start - Stop data
not occurred

Dantrium for patients

Based upon data in human volunteers, it will sometimes be appropriate to tell patients who receive Dantrium Intravenous that decrease in grip strength and weakness of leg muscles, especially walking down stairs, can be expected postoperatively. In addition, symptoms such as "lightheadedness" may be noted. Since some of these symptoms may persist for up to 48 hours, patients must not operate an automobile or engage in other hazardous activity during this time. Caution is also indicated at meals on the day of administration because difficulty swallowing and choking has been reported. Caution should be exercised in the concomitant administration of tranquilizing agents.

Hepatotoxicity seen with Dantrium Capsules: Dantrium (dantrolene sodium) has a potential for hepatotoxicity, and should not be used in conditions other than those recommended. Symptomatic hepatitis (fatal and non-fatal) has been reported at various dose levels of the drug. The incidence reported in patients taking up to 400 mg/day is much lower than in those taking doses of 800 mg or more per day. Even sporadic short courses of these higher dose levels within a treatment regimen markedly increased the risk of serious hepatic injury. Liver dysfunction as evidenced by blood chemical abnormalities alone (liver enzyme elevations) has been observed in patients exposed to Dantrium for varying periods of time. Overt hepatitis has occurred at varying intervals after initiation of therapy, but has been most frequently observed between the third and twelfth month of therapy. The risk of hepatic injury appears to be greater in females, in patients over 35 years of age, and in patients taking other medication(s) in addition to Dantrium (dantrolene sodium). Dantrium should be used only in conjunction with appropriate monitoring of hepatic function including frequent determination of SGOT or SGPT.

Fatal and non-fatal liver disorders of an idiosyncratic or hypersensitivity type may occur with Dantrium therapy.

Dantrium Interactions

Dantrium is metabolized by the liver, and it is theoretically possible that its metabolism may be enhanced by drugs known to induce hepatic microsomal enzymes. However, neither phenobarbital nor diazepam appears to affect Dantrium metabolism. Binding to plasma protein is not significantly altered by diazepam, diphenylhydantoin, or phenylbutazone. Binding to plasma proteins is reduced by warfarin and clotibrate and increased by tolbutamide.

Cardiovascular collapse in patients treated simultaneously with varapamil and dantrolene sodium is rare. The combination of therapeutic doses of intravenous dantrolene sodium and verapamil in halothane/a-chloralose anesthetized swine has resulted in ventricular fibrillation and cardiovascular collapse in association with marked hyperkalemia. It is recommended that the combination of intravenous dantrolene sodium and calcium channel blockers, such as verapamil, not be used together during the management of malignant hyperthermia crisis until the relevance of these findings to humans is established.

Administration of dantrolene may potentiate vecuronium-induced neuromuscular block.

Manufacturers name:

  • Procter & Gamble Pharmaceuticals
  • JHP Pharmaceuticals LLC

Dantrium tags categories:

Generic name, Overdose, Half Life Dantrium, Food Interactions, Chemical, etc..

Dantrium see also FDA report

Brand Names containing Dantrolene

Chemical structure:
O N N + N _ O O + N _ O O H H H H H H H H H H C14H10N4O5 2D chemical structure C14H10N4O5 SVG | 2D structure chemical names, chemical properties, classification C14H10N4O5