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How soon after starting Xalkori will my symptoms improve?

You may start to see improvements in the first few months after starting Xalkori (crizotinib), which is used for a certain kind of lung cancer. In two studies, more than half of people taking the medicine experienced improvements in their tumors. Of this group, more than half experienced their improvements in eight weeks. Others took longer.

The U.S. Food and Drug Administration approved this drug because studies showed it shrank some of the cancerous tumors in patients' lungs. There are currently no studies showing that the drug helps people live longer.

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