With the discovery of new “toxins.” the onus is not only on the manufacturer but also on the user This means fully evaluating the health and safety effects of the substances produced and used As health care professionals, we must continue to increase our knowledge and skills In order to maintain a healthy and safe work environment. The role of OHNs in managing health and safety programs is continually expanding Complying with the legislative regulations such as state right-to-know laws and the Hazard Communication Standard, requires the OHN to possess an ongoing knowledge and understandng of toxicology Toxicology allows us a better understanding of how our bodies react with the changing environment that surrounds each one of us A basic understanding of toxicology is a stepping stone to understanding the complexities of occupational health.