Vinpocetine (brand names: Cavinton, Intelectol; chemical name: ethyl apovincaminate) is a semisynthetic derivative of vincamine, which is extracted from the periwinkle plant. It increases cerebral blood flow and is said to improve memory.

It is an inhibitor of Phosphodiesterases I and IV, with an IC50 of approximately 10-5 M.

The substance is widely sold as a supplement on the Internet and has been sold via health food stores, however there appears to be some controversy over the possibility of adverse reaction, and low initial dose is recommended by some retailers. Vinpocetin is included in many performance enhancing supplements to help with delivery of nutrients to muscles after workout. There is one isolated claim of agranulocytosis.