Final answer:
The term that describes the process when one drug changes the way another drug affects the body is drug interaction. Drug interactions can occur when two or more drugs are taken together and can either enhance or diminish the effects of each drug.
Step-by-step explanation:
The term that describes the process when one drug changes the way another drug affects the body is drug interaction. Drug interactions can occur when two or more drugs are taken together and can either enhance or diminish the effects of each drug. For example, taking a drug that inhibits the liver enzymes responsible for breaking down another drug can increase the concentration and effects of that drug in the body.