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Aneurysmal Subarachnoid Hemorrhage

Part of Intracranial Hemorrhage

11 published articles · Updated continuously

Clinical Trial Landscape

Clinical Trials for Aneurysmal Subarachnoid Hemorrhage

7 trials tracked for Aneurysmal Subarachnoid Hemorrhage: 3 in phase 3 or 4 and 2 with published results. The most-cited published study has 45 citations.

7Trials tracked
3Phase 3 & 4
0Recruiting
2With published results
Phase distribution
Phase 4 2 Phase 3 1 Phase 2 3 Other / NA 1
  1. Phase 3 Clinical Research Study With Clazosentan to Evaluate Its Effects on Preventing Complications Due to the Narrowing of the Blood Vessels (Vasospasm) in the Brain, Caused by Bleeding Onto the Surface of the Brain Completed · 45 cited
  2. Phase 4 Gabapentin for Headache in Aneurysmal Subarachnoid Hemorrhage Completed · 21 cited
  3. Phase 4 Acetazolamide Challenge With Perfusion in the Prediction of Cerebral Vasospasm Completed
  4. Phase 2 Subarachnoid Hemorrhage and Soluble Epoxide Hydrolase Inhibition Trial Completed
  5. Phase 2 The Effects of Tiopronin on 3-Aminopropanal Level & Neurologic Outcome After Aneurysmal Subarachnoid Hemorrhage Completed
  6. Phase 2 Induced Suppression of Platelets Activity in Aneurysmal SAH Management (iSPASM) Completed
Show 1 more trials
  1. N/A Safety and Efficacy of Non-invasive Vagus Nerve Stimulation in the Treatment of Headache in Subarachnoid Hemorrhage Completed

Showing the 7 most-cited and recently-updated of 7 trials. Browse the full registry →

Trial data sourced from ClinicalTrials.gov. Counts describe the research landscape and are not a treatment recommendation. Informational only — not medical advice.

What the trials found For clinicians

Aneurysmal Subarachnoid Hemorrhage: what the trials found

Clinical trials have evaluated several pharmacological interventions for aneurysmal subarachnoid hemorrhage (aSAH). Clazosentan was assessed regarding its impact on clinical deterioration due to delayed cerebral ischemia (DCI) and clinically relevant cerebral infarction; results showed no statistically significant difference between groups in either outcome (p=0.7338 and p=0.177, respectively) 3. Furthermore, the modified Rankin Scale (mRS) at week 12 did not show a statistically significant difference between treatment arms (p=0.1983) 3.

Acetazolamide was evaluated for its effects on cerebral hemodynamics, resulting in a 20.722% relative percent change in cerebral blood flow and increases in brain imaging maps for both the left hemisphere (19.785%) and right hemisphere (21.659%) 2.

Gabapentin was investigated for pain management; however, no statistically significant differences were found between groups regarding average numeric pain scores (p=0.7), average narcotic consumption (p=0.79), or pain control satisfaction (p=0.66) 1.

Recent results — preliminary, needs further review

  • Tiopronin was evaluated in a phase 2 trial where mRS scores at discharge, 3 months, and 12 months were recorded (N=60) 4.

For the clinician treating this condition

  • Clazosentan did not demonstrate significant differences in DCI-related deterioration or cerebral infarction rates compared to control groups 3.
  • Acetazolamide is associated with measurable increases in cerebral blood flow and changes in bilateral hemisphere brain imaging maps 2.
  • Gabapentin showed no statistically significant impact on pain scores, narcotic requirements, or patient satisfaction in the studied cohort 1.

AI synthesis of 4 cited trials, updated Jun 29, 2026. Informational only — not medical advice; trial data sourced from ClinicalTrials.gov. How we use AI.

HCP Mode — summaries include clinical detail, trial data, and statistical outcomes.
Patient Mode — summaries use plain language, avoiding clinical jargon.

Research across Intracranial Hemorrhage

Related studies from across the Intracranial Hemorrhage family.

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Hydrocephalus and high Fisher grade blood distribution are strongly associated with post-procedural seizures in SAH
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Lumbar puncture identifies subarachnoid blood while CT angiography facilitates rapid vascular assessment in SAH
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A liver health score called FIB-4 shows a link to higher risks of stroke, poor recovery, and death in patients with brain injuries.
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Intracerebral hemorrhage survivors face annual rates of 2.1% recurrent ICH and 2.0% ischemic stroke
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Questions about Aneurysmal Subarachnoid Hemorrhage

Does where my aneurysm is located change my chances of dying from aneurysmal subarachnoid hemorrhage?

A large meta-analysis found no significant difference in mortality between anterior and posterior circulation aneurysm locations after aSAH.

Full answer →
Will my aneurysm location affect my survival after aneurysmal subarachnoid hemorrhage?

A large meta-analysis found no significant difference in survival between anterior and posterior circulation aneurysm locations after subarachnoid hemorrhage.

Full answer →
Can a five-variable model predict my 90-day outcome after aneurysmal subarachnoid hemorrhage?

Yes, a five-variable model using age, pre-morbid mRS, WFNS grade, modified Fisher grade, and ICH on CT can predict 90-day outcomes after aSAH with good accuracy (AUC 0.868-0.917).

Full answer →