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Nausea and Vomiting (PDQ®)

Patient Version

Radiation Therapy and Nausea and Vomiting

Radiation therapy may cause nausea and vomiting.

Radiation therapy may cause nausea and vomiting, especially in patients who are receiving radiation therapy to the gastrointestinal tract, liver, or brain. The risk for nausea and vomiting increases as the dose of radiation and the size of the area being treated increase. Nausea and vomiting caused by radiation therapy usually occur one-half hour to several hours after treatment. Patients may have fewer symptoms on days they do not have radiation therapy.

  • Updated: December 12, 2013