#addict  someone who is physiologically dependent on a substance; abrupt deprivation of the substance produces withdrawal symptoms
  supertype:  #drug_user__substance_abuser__substanceabuser__user  a person who takes drugs
  subtype:  #caffeine_addict__caffein_addict__caffeinaddict  someone addicted to caffeine
  subtype:  #drug_addict__junkie__junky  a narcotics addict
     subtype:  #cocaine_addict__cocaineaddict  a person addicted to cocaine
     subtype:  #heroin_addict  someone addicted to heroin
     subtype:  #opium_addict__opiumaddict__opium_taker__opiumtaker  someone addicted to opium
     subtype:  #withdrawer.drug_addict  a drug addict who is discontinuing the use of narcotics
  subtype:  #speed_freak__speedfreak  addict who habitually uses stimulant drugs (especially amphetamines)

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