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1) A substance/drug or nutrient that can cause, influence or otherwise induce stereotypical female behavior.
2) Any drug or medication taken purposefully to either prevent negative side-effects of the female menstrual cycle, or to act as a contraceptive.
"The doctors prognosis was that eating too many salads, tofu, and lowfat yogurt can cause an unhealthy imbalance of vagitamins.
There are two solutions to your bitch girlfriend. Make sure she takes her monthly vagitamins (midol, tylenol), and shaking her really hard."
(urbandictionary.com)