Effect of Raised Head of the Bed on Lying Blood Pressure in Autonomic Failure

This study tests whether simply raising the head of the bed at night can lower dangerously high blood pressure that occurs when lying flat in people with autonomic failure — a condition where the nervous system cannot properly regulate blood pressure. **You may be eligible if...** - You have been diagnosed with autonomic failure - You experience high blood pressure when lying down (supine hypertension) - You are between 18 and 85 years old **You may NOT be eligible if...** - You are a medical student (excluded per protocol) - You are pregnant - You have heart failure, symptomatic coronary artery disease, liver disease, or a history of stroke or heart attack - You have serious allergies or severe asthma Talk to your doctor to see if this trial is right for you.