text: Most drugs and drug candidates contain amine functional groups:
  * Chlorpheniramine is an antihistamine that helps to relieve allergic disorders due to cold, hay fever, itchy skin, insect bites and stings.
  * Chlorpromazine is a tranquilizer that sedates without inducing sleep. It is used to relieve anxiety, excitement, restlessness or even mental disorder.
  * Ephedrine and phenylephrine, as amine hydrochlorides, are used as decongestants.
  * Amphetamine, methamphetamine, and methcathinone are psychostimulant amines that are listed as controlled substances by the US DEA.
  * Thioridazine, an antipsychotic drug, is an amine which is believed to exhibit its antipsychotic effects, in part, due to its effects on other amines.
  * Amitriptyline, imipramine, lofepramine and clomipramine are tricyclic antidepressants and tertiary amines.
  * Nortriptyline, desipramine, and amoxapine are tricyclic antidepressants and secondary amines. (The tricyclics are grouped by the nature of the final amino group on the side chain.)
  * Substituted tryptamines and phenethylamines are key basic structures for a large variety of psychedelic drugs.
  * Opiate analgesics such as morphine, codeine, and heroin are tertiary amines.