How long does it take to work and how do you know if it's working?

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by Drugs.com
Results from clinical trial indicate that it can take about 2 months to see a response to treatment with Opdivo, but some patients will respond more quickly and others will take longer. Your doctor will order periodic tests, such as CT (computed tomography) and PET (positron emission tomography) scans and MRI (magnetic resonance imaging) to see if you are responding to treatment.

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