Study: Too much coffee can lead to hallucinations

June 7, 2011 10:43:59 AM PDT
A new study shows drinking five cups or more a day of coffee can cause hallucinations. The study claims it causes people to hear sounds and voices that don't really exist.

Researchers at La Trobe University in Australia played a "fuzzy sound" for 92 study participants; those who were very stressed and had at least five cups of coffee reported hearing music within the sounds. The researchers describe caffeine as "the most commonly used psychoactive drug."