An alkaloid extracted from the oleander family, a derivative of vincamine.
Selectively inhibits cerebral vascular smooth muscle calcium-dependent phosphodiesterase, increases cGMP, dilates cerebral blood vessels, and then increases cerebral blood flow and improves cerebral circulation, but has little effect on cardiovascular and blood pressure.
It is used for dizziness, headache, memory disorder, movement disorder, aphasia, hypertensive encephalopathy, etc. It is also used for mental or neurological symptoms caused by cerebral blood circulation disorder.