Latin name- Vitex agnus castus. Herbal tinctures are made by extracting the herbal constituents of a plant in a mixture of water & alcohol. Avoid During Pregnancy Herbs taken in theraputic dosages should be checked for safety & use during pregnancy & breast feeding in consultation with a qualified herbal practitioner. This herb should not be used internally during pregnancy unless prescribed by a qualified medical herbalist trained in the appropriate use of these substances. Best Not Taken in Conjunction With: Progestogenic drugs, the Contraceptive pill, Hormone replacement therapy.