adverse reaction

{
  "id": "MLC-T-ONC-000290",
  "term": "adverse reaction",
  "field": "Oncology and biomedicine",
  "definition": "An undesired effect of a drug or other type of treatment, such as surgery. Adverse reactions can range from mild to severe and can be life-threatening. Also called adverse effect and adverse event.",
  "synonyms": [
    "adverse effect",
    "adverse event"
  ],
  "references": [
    "NCI Dictionary of Cancer Terms"
  ],
  "url": "https://mlchart.com/terminology/oncology/adverse-reaction/"
}