leave off the extras, we never know which drugs don't mix well. Alternating treatments might be ok but mixing is seldom a good idea. Horses and humans differ a great deal with their digestive tract, so use twice the amount when dosing as recommended for horse weight. Fenbendazole 10% by Safeguard is a true miracle worker and has saved countless lives for both adults and children. Fenben also shrinks tumors, when combined with certain vitamins.