Drug effects research is a field of study that focuses on understanding the impact of various substances on the human body, both in terms of desired effects (such as pain relief or improved cognitive function) and potential negative side effects (such as addiction or organ damage). Researchers in this area may investigate how drugs interact with specific receptors in the body, the biochemical pathways involved in drug metabolism, and the long-term consequences of drug use on physical and mental health. This research is critical for informing drug development, public health policies, and treatment approaches for individuals dealing with substance abuse issues.