Important medicinal properties.
Cardiovascular diseases:
– hypertonic disease;
– Ischemic disease;

Gastrointestinal diseases:
– peptic ulcer with high acidity;

Biologically active substances of a plant, its toxicity and safety.
The plant contains the following substances:
– tannins – up to 4%;
– essential oil – about 0.05%;
– resin – about 16%;
– Traces of alkaloids – 12-55 mg /%;
– phytosterols;

Recipes for the use of periwinkle.
Infusion.
Preparation: 1 tablespoon of crushed leaves and thin stems add to 1 cup boiling water, leave for two hours, drain.
Dose: drink half a cup 3-4 times a day.

Alcohol Oil Extract
Preparation: coarsely cut grass is moistened with a sufficient amount of 40% alcohol and infused for 12 hours in a sealed container at room temperature, stirring occasionally. Then, sunflower oil is added to the mass, gently heated in a water bath for 2-4 hours, then squeezed and filtered through a dry filter. Store in a dark, cool place in a well-closed glass container.

Contraindications:
– bradycardia;
– thrombophlebitis;
– hypotension.