Madagascar Periwinkle

[―λlτεrηιτγ-]

Pharmacology

The hypoglycemic activity of alkaloids isolated from Catharanthus roseus have been studied pharmacologically and a natural remedy derived from the plant has been marketed under the proprietary name Vinculin® as a treatment for diabetes.
Alcoholic whole plant extracts at high dose (500 mg/kg) exhibited significant antihyperglycemic activity and has absence of acute toxicity. The extract effectively reverses the changes in the blood sugar level and the beta-cell population. The exact phytoconstituents responsible for the antidiabetic effect are not known yet.

http://www.tropilab.com/periwinkletincture.html

Catharanthus  roseus
Don,  also known  as  Vinca,  which  is  used  by  the  population  in Madagascar  in  treating  diabetes.

https://www.researchgate.net/publication/253241700_Bioactive_compounds_from_zoanthids_CnidariaAnthozoa_A_brief_review_with_emphasis_on_alkaloids