Hallucinogen persisting perception disorder (HPPD) is a rare medical condition that can cause visual disturbances (sometimes called flashbacks) if you’ve taken hallucinogenic drugs in the past. With ...

“Hallucinate” is Dictionary.com’s word of the year — and no, you’re not imagining things. The online reference site said in an announcement Tuesday that this year’s pick refers to a specific ...

A recent review of the literature found ample evidence that some sedative hypnotic drugs can cause vivid sexual hallucinations. The analysis discovered that sexual fantasies are most often associated ...

LSD (lysergic acid diethylamide), also called “acid,” is a type of synthetic and mind-altering substance (psychedelic). This belongs to a class of drugs called hallucinogens. When you take LSD, even ...

When you hear the word "hallucination," you may think of hearing sounds no one else seems to hear or imagining your coworker has suddenly grown a second head while you're talking to them. But when it ...

While most people might think of hallucinating as something that afflicts the human brain, Dictionary.com actually had artificial intelligence in mind when it picked "hallucinate" as its word of the ...