Narrator: This is Science Today. Many people think sleeping pills will ensure a good night's sleep and improve function the next day. But Daniel Kripke, a psychiatry professor at the University of California, San Diego, has done extensive research on sleeping pills and says that's not the case.
Kripke: Taking a sleeping pill does not help people function. They produce a delusion of improvement. Many of the sleeping pills leave people in a fog. But what's surprising is that there's some evidence that even the very short acting sleeping pills produce some impairment of performance.
Narrator: You also won't win any popularity contests.
Kripke: A surprising finding in some studies is that people who take sleeping pills are found to be less likeable by their friends and relations. They do seem grumpier and we find in some studies that sleeping pills make people more depressed.
Narrator: For Science Today, I'm Larissa Branin.