This tool explains what the interaction is and how it occurs, the level of importance and how to handle the drug interaction. It will also display any interactions between your chosen medicines, alcohol, food, beverages, or medical conditions. The meaning of INTERACTION is mutual or reciprocal action or influence. How to use interaction in a sentence. This disambiguation page lists articles associated with the title Interaction. If an internal link incorrectly led you here, you may wish to change the link to point directly to the intended article. Interaction between is used when referring to the relationship or communication between two entities, while interactions between is used when discussing multiple relationships or communications among several entities. Medscape's Drug Interaction Checker helps you build safer, more effective treatment plans by quickly identifying potential interactions between medications, supplements, and even common foods. In ecology, a biological interaction is the effect that a pair of organisms living together in a community have on each other. They can be either of the same species (intraspecific interactions), or of different species (interspecific interactions). Use WebMD’s Drug Interaction Checker to identify potential interactions between medications, supplements, and foods. Reduce side effects and support safer treatment decisions. My instinctive response is: interaction of x with y is to describe what x is doing to y, but not what y is doing to x. Interaction between x and y describes what both are doing with each other. 'Interaction between' is used when referring to the relationship or communication between two or more entities, while 'interaction of' is used to describe the combination or influence of different elements. INTERACTION definition: 1. an occasion when two or more people or things communicate with or react to each other: 2. an…. Learn more.