Of the three different Periwinkles described on the main Periwinkle page, Madagascar or "Rosy" Periwinkle is by far the most important plant medicinally, generating hundreds of millions per year in the pharmaceutical industry as a promising addition to the arsenal against childhood leukemia, Hodgkin's Disease,  testicular cancer and cancerous tumors, high blood pressure, and uncontrolled bleeding, not to mention the fact that it has powerful tranquilizing properties. Unfortunately, this plant can also be poisonous if used inappropriately.  Therefore, the remainder of the Rosy Periwinkle section is for informational purposes only.

Historically,  Rosy Periwinkle has been used to treat high blood sugar in diabetics, and many cultures still drink teas made out of the plant for this purpose.  Unfortunately, recent testing has indicated that it has no effect on this particular disease.

Externally, Rosy Periwinkle leaves can be bruised and applied directly to the affected area for wasp stings, to relieve eye inflammation,  and to stop bleeding.  Alternatively, the leaves can be boiled and a cloth soaked with the liquid and applied to the affected area, or an ointment can be made using oils from the plant. 

Vinca Major & Vinca Minor appear to be quite similar as far as medicinal qualities, but can also be poisonous if used inappropriately.  Therefore, the rest of the information in this section should be used for information only, and not for practical use.  Internally the leaves have been used for improved oxygen and blood flow, especially in cerebral veins and arteries for improvement of cognitive function,  tinnitus, depression, fatigue, problems associated with menopause, heavy menstruation, mild hypertension, headache, congestion, and as a gargle for sore throats.

Externally, a oil or ointment can be made, or the leaves can be bruised and applied directly for dermatitis, eczema, acne, bleeding gums, nosebleeds, mouth ulcers, and bleeding hemorrhoids,

ONE LAST WORD OF WARNING - Periwinkles are members of the Dogbane family, many members of which are big-time poisonous when ingested.  Therefore, if you are going to try internal concoctions made at home, do it with extreme caution and in extreme moderation.  Don't try this herb when pregnant or if you have kidney, liver, or lung disease.  Externally, I know of no side-effects when used properly.