Synthetic / Semi synthetic sources

• when the nucleus of the drug is from natural sources as well as its chemical structure is altered

  Synthetic
• Examples of synthetic

  Emetine, Bismuth Iodide
• When the nucleus of drug obtained from natural source is retained but the chemical structure is altered


  Semi synthetic
• Examples of semi synthetic source

  Apomorphine, Diacetyl morphine, Ethinyl Estradiol, Homatropine, ampicillin and methyl testosterone
• Most of the drugs used nowadays (such as antianxiety drugs, anti convulsants) are semisynthetic forms