From the Manufacturer:
The combination of ingredients in Uterol is specifically designed to relieve and eliminate PMS symptoms.
They work by lowering levels of prolactin as well as affecting dopamine receptors in the body. The three key ingredients have been shown again and again in documented research, tests and studies, as well as throughout a history of use both in the United States and internationally, to be not only effective, but safe.
For most women, these ingredients are far superior to “traditional/conventional” treatments (heating pads, prescriptions, etc.) in reducing and eliminating breast tenderness and swelling, depressive moods and anxiety, cramps and muscle spasms and various other symptoms related to PMS caused by hormone fluctuations.