Participating in Clinical Trials

Terms to Know

Try this 4 - question quiz to see how much you know about Participating in Clinical Trials: Terms to Know.

1. A placebo is




That's correct. A is the correct answer.

A placebo is a substance that has no active ingredients in it and is sometimes called a sugar pill. It looks like the experimental treatment and is given to some of the volunteers in the study. Researchers compare the results of taking a placebo with the experimental drug results.