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Clinical Trials

"Phases" for Cancer Clinical Trials

Cancer treatments are tested in three to four phases before they become standard treatment. Each phase of testing seeks answers to specific questions.

Phase I

  • How does the new treatment affect the human body?
  • How should the new treatment be given?
  • What is the safe dose for the new treatment?
  • About 15-30 people participate
  • The CU Cancer Center is the only place in the Rocky Mountain region that offers Phase I trials

Phase II

  • Does the new treatment affect a certain cancer?
  • How does the new treatment affect the human body?
  • Fewer than 100 people participate
  • The CU Cancer Center has more Phase II trials than any other center in the region

Phase III

  • How does the new treatment compare to the current or standard treatment?
  • 100 to thousands of people participate

Phase IV

  • How safe and effective is the new treatment in the long term?
  • Several hundred to thousands of people participate

For more information about participating in clinical research trials, please read the NCI online booklet, Taking Part in Cancer Treatment Research Studies.

 

Cancer trials: tips for using the search feature

  • The "cancer trials" tab on the Clinical Trials Search page shows the cancer areas that have trials open for enrollment. If a specific cancer area is not listed, we do not currently have an open trial in that area.
  • The All Cancers category lists Phase I clinical cancer trials only.
  • We refresh our clinical trials list every Thursday night. Check back for new trials.
  • Pediatric cancer clinical trials are not included in our database.
  • To see a national list of clinical cancer trials, visit www.clinicaltrials.gov.