How long does chemotherapy stay in your system?

2 answers | Last updated: Nov 14, 2016
A fellow caregiver asked...

How long does chemotherapy stay in your system after all treatments?

Expert Answers

Andrew Putnam, M.D. is a Palliative Care physician at Smilow Cancer Center at Yale New Haven Hospital and Yale University.

While the effects of chemotherapy can take place over a longer period of time (maybe weeks),  the actual chemicals that are chemotherapy are generally out of the person's system within 24 hours.  This assumes that the person's kidneys and liver are able to process the chemotherapy within a normal period of time

Community Answers

A fellow caregiver answered...

If that is the case then why does it take 3-5 days after chemotherapy to get the cold/mouth sores and such? Seems to me that it stays in your body longer than that.