The drug, a hormone replacement that alleviates the symptoms of menopause, is made from the urine of pregnant mares, according to a letter published today by the Johnson City Press of Johnson City, TN.
A search for ‘premarin horses’ suggests that it’s true, and may qualify as animal cruelty, but Western Horse Watchers does not know if the practice goes on today.
Side effects include blood clots, stroke and breast cancer.
Western Horse Watchers Association 