Substance intoxication is a transient condition of altered consciousness and behavior associated with recent use of a substance. It is often maladaptive and impairing, but reversible. If the symptoms are severe, the term "substance intoxication delirium" may be used.
Contact high is a phenomenon that occurs in, otherwise sober, people who experience a drug-like effect just by coming into contact with someone who is under the influence of a psychoactive drug. In a similar way to the placebo effect, a contact high may be caused by classical conditioning as well as by the physical and social setting.
Slang terms include: getting high (generic), being stoned, cooked, or blazed (usually in reference to cannabis), and many more specific slang terms for particular intoxicants. Alcohol intoxication is graded in intensity from buzzed, to tipsy (all the way up to drunk, hammered, plastered, smashed, wasted, destroyed, shitfaced and a number of other terms). The term rolling is a common word used to describe being under the influence of MDMA and for LSD the phrases frying or tripping have been used. “Tripping” is a term that is considered applicable to virtually all hallucinogens which includes psychedelics, dissociatives, deliriants and possibly certain types of hypnotics.