This is the state of being physically or psychologically dependent on some substance. Common abused substances include: ethyl alcohol (grain alcohol) opioids (opium, heroin, hydrocodone, hydromorphone, oxycodone, meperidine [Demerol]) hallucinogens (LSD, psilocybin, DMT, morning glory seeds) mescaline, MDA, PMA, STP amphetamines cocaine inhalants (solvents and aerosols)