Medical scientists typically do the following:

• Design and conduct studies that investigate both human diseases and methods to prevent and treat them
• Prepare and analyze medical samples and data to investigate causes and treatment of toxicity, pathogens, or chronic diseases
• Standardize drug potency, doses, and methods to allow for the mass manufacturing and distribution of drugs and medicinal compounds
• Create and test medical devices
• Develop programs that improve health outcomes, in partnership with health departments, industry personnel, and physicians
• Write research grant proposals and apply for funding from government agencies and private funding sources
• Follow procedures to avoid contamination and maintain safety

Many medical scientists form hypotheses and develop experiments, with little supervision. They often lead teams of technicians and, sometimes, students, who perform support tasks. For example, a medical scientist working in a university laboratory may have undergraduate assistants take measurements and make observations for the scientist’s research.

Medical scientists study the causes of diseases and other health problems. For example, a medical scientist who does cancer research might put together a combination of drugs that could slow the cancer’s progress. A clinical trial may be done to test the drugs. A medical scientist may work with licensed physicians to test the new combination on patients who are willing to participate in the study.

In a clinical trial, patients agree to help determine if a particular drug, a combination of drugs, or some other medical intervention works. Without knowing which group they are in, patients in a drug-related clinical trial receive either the trial drug or a placebo—a pill or injection that looks like the trial drug but does not actually contain the drug.

Medical scientists analyze the data from all of the patients in the clinical trial, to see how the trial drug performed. They compare the results with those obtained from the control group that took the placebo, and they analyze the attributes of the participants. After they complete their analysis, medical scientists may write about and publish their findings.

Medical scientists do research both to develop new treatments and to try to prevent health problems. For example, they may study the link between smoking and lung cancer or between diet and diabetes.

Medical scientists who work in private industry usually have to research the topics that benefit their company the most, rather than investigate their own interests. Although they may not have the pressure of writing grant proposals to get money for their research, they may have to explain their research plans to nonscientist managers or executives.

Medical scientists usually specialize in an area of research within the broad area of understanding and improving human health. Medical scientists may engage in basic and translational research that seeks to improve the understanding of, or strategies for, improving health. They may also choose to engage in clinical research that studies specific experimental treatments.