More than 13 M people are hit by stroke each year. Subarachnoid Haemorrhage (SAH) is a specific type of stroke, caused by bleeding into the space surrounding the brain. The short-term mortality rate is approximately 50%, and more than 50% of survivors make an incomplete recovery, enduring life-long neurological and cognitive impairment. SAH represents 5% of all strokes but affects people of all ages (with a peak at ~55 years), accounting for 25% of all productive life-years lost to all subtypes of stroke. The socioeconomic burden of SAH almost equals that of ischemic stroke, a condition 20 times more frequent than SAH. Despite the huge burden, healthcare systems, the society, and the economy, current drug therapies have little or no effect, and all attempts to develop new drugs have so far failed. With EDVance project, we will pursue clinical validation of EDV2209 and establish its safety and efficacy in SAH patients. Our aim is to develop a pharmacological treatment for SAH, based on a fundamentally different approach: EDV2209 reduces the upregulation of cerebrovascular contractile receptors that occurs after SAH, reducing vasoconstriction. By ensuring that the blood vessels remain open, brain cells are continuously supplied with oxygen and nutrients, which is vital to reduce tissue damage.