Drug substance

{
  "id": "MLC-T-ONC-002594",
  "term": "Drug substance",
  "field": "Oncology and biomedicine",
  "definition": "The main ingredient in a medicine that causes the desired effect of the medicine. Some medicines contain more than one drug substance that act in different ways in the body. Also called active pharmaceutical ingredient, API, and pharmacologic substance.",
  "synonyms": [
    "active pharmaceutical ingredient",
    "API",
    "pharmacologic substance"
  ],
  "references": [
    "NCI Dictionary of Cancer Terms"
  ],
  "url": "https://mlchart.com/terminology/oncology/drug-substance/"
}