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Patients who seek medical care after self-administering mind-altering substances may have used any of a large variety of chemicals. Several of these agents are discussed elsewhere in this manual (eg, amphetamines [See Amphetamines], cocaine [See Cocaine], marijuana [See Marijuana], phencyclidine [See Phencyclidine (PCP) and Ketamine], and toluene [See Toluene and Xylene]). The drugs discussed in this chapter, LSD and other hallucinogens, have become known in some circles as entactogens (“to touch within”), enhancing sensations and promoting illusions. Several have been used widely for personal experimentation as well as clinically to facilitate psychotherapeutic interviews. Although the use of LSD and other hallucinogens has declined over the past decades, these agents are nevertheless still abused. Table II–32 lists some common and uncommon hallucinogens.

Table II-32 Hallucinogens

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