Skip Navigation
Department of Health and Human Services www.hhs.gov
  • Home
  • Glossary of Terms
 
 

Glossary of Terms

We know that many of the concepts used on this site can be difficult to understand. For that reason, we have provided you with a glossary to help you make sense of the terms used in Comparative Effectiveness Research. Every word that is defined in this glossary should appear highlighted throughout the Web site. When you come upon a highlighted term and would like to read the full definition, you can either click on the word to visit the glossary or roll your mouse over the word for a pop-up definition.

 

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Adverse Reaction

Definition: Any negative or unwanted effect from a drug, device, or medical test.

Example: For example, some people might experience dizziness when they start a medication. The dizziness is an adverse reaction.

Related Terms