Periwinkle is an herb. The parts that grow above the ground are used to make medicine. Don’t confuse periwinkle with Madagascar periwinkle.
Despite serious safety concerns, periwinkle is used for “brain health” (increasing blood circulation in the brain, supporting brain metabolism, increasing mental productivity, preventing memory and concentration problems and feebleness, improving memory and thinking ability, and preventing early aging of brain cells).
Periwinkle is also used for treating diarrhea, vaginal discharge, throat ailments, tonsillitis, chest pain, high blood pressure, sore throat, intestinal pain and swelling (inflammation), toothache, and water retention (edema). It is also used for promoting wound healing, improving the way the immune system defends the body, and for “blood-purification.”
A chemical in periwinkle called vincamine can be converted in the laboratory to the compound vinpocetine, which is marketed as a dietary supplement.
- Preventing brain disorders.
- Sore throat.
- Intestinal swelling (inflammation).
- Chest pain.
- High blood pressure.
Periwinkle is unsafe. It can cause side effects such as nausea, vomiting, and other stomach and intestinal symptoms. It can also cause nerve, kidney, and liver damage. Large amounts can cause very low blood pressure.
Special Precautions & Warnings:
Periwinkle is unsafe for anyone to use, but people with certain conditions are especially at risk for harmful side effects.
Periwinkle has a drying effect on tissues. This means it can make constipation worse. Don’t use it.
2. Low blood pressure:
Periwinkle can lower blood pressure. If you already have low blood pressure, using periwinkle can make it drop too low. Don’t use it.
Periwinkle can lower blood pressure. There is a concern that it might interfere with blood pressure control during and after surgery. Stop using periwinkle at least 2 weeks before a scheduled surgery.