Rauwolscine (alpha-yohimbine) is an alkaloid from Rauwolfia plants. Structurally close to yohimbine, it blocks alpha-2 adrenergic receptors. This action can alter blood flow and metabolic signaling.
People sometimes take it to sharpen workout performance or improve body composition. Human evidence is thin. Because it produces stimulant-like effects, users usually take it in the morning so it doesn't disturb sleep.
Side effects include a faster heart rate, jitters, and higher blood pressure. Anyone with a heart condition or anxiety disorder should be careful with this compound.