Vitex can reduce the effectiveness of oral contraceptives; it has actually shown significant efficacy in infertility treatment. It should not be used when pregnant or nursing. Finally, it should not be used with drugs that are dopamine antagonists. It is quite possible that there are other contraindications that will reveal themselves as the herb and oil are used more widely.
Use of essential oil Vitex must still be regarded as experimental, and the author suggests that any woman using the oil must be fully informed of the relative newness of the oil. Practitioners may wish to consider signed consent forms. Any data on response to the oil, including intolerance, is very valuable and is welcomed by the author.
Can a woman with breast cancer issues use Vitex? According to Northrup and other sources, yes. It is not a phytoestrogen, nor does is stimulate estrogen production. Of course, any woman dealing with breast cancer issues should seek the counsel of a medical professional before using Vitex or any hormone balancing program.
Vitex agnus castus is no magic bullet. It does not work for everyone, but it does work remarkably well for a lot of women. It works best in the context of a holistic health maintenance program. Factors which should be addressed include diet, exercise, attitude, stress management and spiritual balance. I have found essential oil Vitex agnus castus to be a steady friend in my own navigation of menopause. With further use and research, it is quite possible that this ancient plant will take its place at the cutting edge of women�s medicine.