Vinca an herbal remedy with a rich history in folk medicine,Vinca is the common name for a pair of perennial flowering shrubs belonging to the dogbane (Apocynaceae) family. The herb has been used for centuries to treat a variety of ailments and was a favorite ingredient of magical charms in the Middle Ages.
While not approved by the Food and Drug Administration (FDA),Vinca has been reported to have a number of beneficial effects. Unfortunately, there is scarcely any scientific evidence to support these claims. Both forms of the herb have been used as an astringent for centuries and may be useful in alleviating excessive bleeding during menstruation , according to some herbalists.
Vinca is not known to be harmful when taken in recommended dosages, though it is important to remember that the long-term effects of taking the herb (in any amount) have not been investigated. Periwinkle should not be used by people with low blood pressure or constipation .
Taking too much Vinca can cause a potentially dangerous drop in blood pressure (symptoms include dizziness and fainting). In case of overdose, seek emergency care. Vinca may cause flushing and gastrointestinal problems.