Quia-Cal™ is a fast acting oral paste that contains a concentrated blend of thiamine (vitamin B1), magnesium, and calcium to promote healthy nerves and disposition. Quia-Cal™ typically works within 1 hour to settle and focus your horse and can last up to 4 hours. Supplied in a convenient oral syringe with a tasty apple flavor. Ideal for performance horses as this product does not contain tryptophan, valerian root, or kava and will not cause drowsiness.