Republican presidential candidate Ben CarsonBenjamin (Ben) Solomon CarsonThe Federal Reserve is setting America up for economic disaster Baltimore's failing schools are a tragedy of criminal proportions The US can grow its own farm workers MORE on Tuesday suggested using "medical ways" — such as decreasing people's conscious defenses — to extract information from terror suspects.

"I believe there are a number of ways to extract information, including some medical ways of putting people into a less-than-conscious state, which allows information to be extracted," he said on CNN.

The retired neurosurgeon said the average person might understand it as "truth serum." He specifically referenced sodium amytal as a possible treatment.

"There are ways where you decrease a person's conscious defenses, and they might be much more willing to give information," he said.

Carson added that there are a variety of different things that can be used for this purpose.

"We've made some advances in that kind of science," he said.