Senthilkumar, P.TANUVAS2018-07-202018-07-202017http://krishikosh.egranth.ac.in/handle/1/5810061292Modern medicines, which are based on synthetic drugs and on antibiotics, have only become available during the last 150 years. Previously, humans had to rely on drugs from nature, mostly from plants, but also from fungi and animals. Medicinal systems around the world, which had been developed thousands of years ago, heavily relied on herbal medicine.en-USVeterinary ScienceVeterinary Pharmacology and ToxicologyBook chapter