Question: What are the treatments for CADASIL ?
Answer: There is no treatment to halt this genetic disorder. Individuals are given supportive care. Migraine headaches may be treated by different drugs and a daily aspirin may reduce stroke and heart attack risk. Drug therapy for depression may be given. Affected individuals who smoke should quit as it can increase the risk of stroke in CADASIL. Other stroke risk factors such as hypertension, hyperlipidemia, diabetes, blood clotting disorders and obstructive sleep apnea also should be aggressively treated..
Source: NINDS

Question: what research (or clinical trials) is being done for CADASIL ?
Answer: The National Institute of Neurological Disorders and Stroke (NINDS) conducts stroke research and clinical trials at its laboratories and clinics at the National Institutes of Health (NIH) and through grants to major medical institutions across the country. Scientists are currently studying different drugs to reduce cognitive problems seen in patients with CADASIL. Researchers are also looking at ways to overcome an over-reaction to hormones that lead to high blood pressure and poor blood supply in patients with CADASIL.
Source: NINDS