Definition: A change in the way a drug acts in the body when taken with certain other drugs, herbals, or foods, or when taken with certain medical conditions. Drug interactions may cause the drug to be more or less effective, or cause effects on the body that are not expected.
Synonyms (terms occurring on more labels are shown first): drug interactions, interactions, drug interaction, drug interaction with, drug-drug interaction, drug- drug interaction, DrugInteractions, inter- actions, Drug Drug Interaction
More information: PubMed search and possibly Wikipedia