(Med-Vet Pharmaceuticals) Calmex is often used as a supplemental aid in performance, show, and race horses. Excellent for competition, training, and trailering. Calmex contains 2000 mg magnesium oxide, 1500 mg thiamine (B1), 1000 mg tryptophan, 1000 mg taurine, 500 mg inositol, 500 mg pyridoxine (B6), 500 mg riboflavin (B2), 50 mg niacin, 1000 mcg folic acid, and 500 mcg vitamin B12 per ounce. Give 1/2 to 3/4 ounce twice daily as needed. Powder.