Safety Study of Dantrolene to Treat Cerebral Vasospasm After Subarachnoid Hemorrhage

2014-08-27 03:19:50 | BioPortfolio


Subarachnoid hemorrhage (SAH) is a devastating acute brain injury due to bleeding onto the brain surface from a ruptured aneurysm. Cerebral vasospasm (cVSP; critical narrowing of brain arteries) is a known complication after SAH and significantly increases disability and death after SAH. Vasospasm is difficult to treat and can lead to stroke. Animal studies have shown that the muscles in the artery wall play a role in cVSP.

Dantrolene has been FDA approved and extensively used in clinical practice as a muscle relaxant for more than 30 years. It has been shown to provide some benefit in animal studies of cVSP, as well as in a small number of humans. Therefore, we plan to undertake this study to evaluate the safety and tolerability of treatment with dantrolene in patients with cVSP after SAH, and to determine the maximal tolerated dose to be used in future studies to determine if treatment with Dantrolene can improve the outcome of patients with cVSP after SAH.


Our main objectives are: 1) to evaluate the safety and tolerability of varying doses of dantrolene, by determining the treatment related adverse events, in patients with cVSP after SAH; and 2) to determine the maximal tolerated dose to be adopted in subsequent studies and 3) to determine efficacy trends of dantrolene on brain vessels as assessed by ultrasound of brain vessels (transcranial Doppler).

We hypothesize that dantrolene is well-tolerated and has minimal serious adverse effects in patients with cVSP after SAH. The results can potentially bring a new treatment to patients with SAH. cVPS after SAH is a frequent cause of disability and death. A successful study demonstrating the safety of dantrolene in would be of considerable public health significance.

Study Design

Allocation: Non-Randomized, Control: Dose Comparison, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment


Cerebral Vasospasm After Subarachnoid Hemorrhage


Dantrolene, Dantrolene


Massachusetts General Hospital
United States




University of Massachusetts, Worcester

Results (where available)

View Results


Published on BioPortfolio: 2014-08-27T03:19:50-0400

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Medical and Biotech [MESH] Definitions

Skeletal muscle relaxant that acts by interfering with excitation-contraction coupling in the muscle fiber. It is used in spasticity and other neuromuscular abnormalities. Although the mechanism of action is probably not central, dantrolene is usually grouped with the central muscle relaxants.

Bleeding into the SUBARACHNOID SPACE due to CRANIOCEREBRAL TRAUMA. Minor hemorrhages may be asymptomatic; moderate to severe hemorrhages may be associated with INTRACRANIAL HYPERTENSION and VASOSPASM, INTRACRANIAL.

Bleeding into the intracranial or spinal SUBARACHNOID SPACE, most resulting from INTRACRANIAL ANEURYSM rupture. It can occur after traumatic injuries (SUBARACHNOID HEMORRHAGE, TRAUMATIC). Clinical features include HEADACHE; NAUSEA; VOMITING, nuchal rigidity, variable neurological deficits and reduced mental status.

Bleeding into one or both CEREBRAL HEMISPHERES due to TRAUMA. Hemorrhage may involve any part of the CEREBRAL CORTEX and the BASAL GANGLIA. Depending on the severity of bleeding, clinical features may include SEIZURES; APHASIA; VISION DISORDERS; MOVEMENT DISORDERS; PARALYSIS; and COMA.

Bleeding into one or both CEREBRAL HEMISPHERES including the BASAL GANGLIA and the CEREBRAL CORTEX. It is often associated with HYPERTENSION and CRANIOCEREBRAL TRAUMA.

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