How much Periwinkle is usually taken?
The amount of vinpocetine used in most studies is 15 mg one to three times per day.17 Vinpocetine should be taken with food, as it has been shown to be better absorbed with meals than when taken away from meals.18 It may take three to six weeks before any improvement is noted.19 A tincture can be taken in the amount of 1 to 2 ml three times per day.20 A tea can be made by infusing 1 teaspoon of herb into a cup of water for 10 to 15 minutes; three cups per day should be drunk.21 Research has not been conducted to determine whether a tincture or a tea provides enough periwinkle compounds to have the same effects as vinpocetine.
