Two drams of copaiba or of solid extract of belladonna or 2 grains Spanish flies daily may serve to restore the lost tone.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
It has an odor similar to that of copaiba, is bitter and aromatic.
"The Medicinal Plants of the Philippines"
T. H. Pardo de Tavera
Dr. Rean also classed it as equal to copaiba in efficiency.
"The Medicinal Plants of the Philippines"
T. H. Pardo de Tavera