A 50-year-old member asked:
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how long do the drugs for chemotherapy and rituxan (rituximab) stay in the system after you're finished?

2 doctor answers
Dr. Devon Webster
21 years experience Medical Oncology
Up to 3 months: Chemotherapy leaves the body very quickly, usually within 24 hours. Rituxan (rituximab) is a monoclonal antibody, which is a protein. It's half-life is one-week, meaning it takes 7 days for half the amount to be gone from your system, and another 7 days for half of the remaining amount to be gone, etc. Rituxan can still be measured in the blood up to 3 months after a dose!
Answered on Apr 10, 2020
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Dr. William A Biermann
45 years experience Medical Oncology
The chemotherapy may leave the body quickly, but the side effects like numbness may last for a long time. Many patients really want to know when they will not feel lingering side effect. That depend on the time it takes for the body to heal.
Jul 14, 2012
Dr. John Goldman
54 years experience Rheumatology
Depends on the drug: Rituxan (rituximab) for RA can have an effect that can last for even over a year . For cancer the dose the other chemotherapy drug duration will depend on the drug itself.
Answered on Mar 8, 2020

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