This clinical trial studies Multiple Myeloma, a type of blood cancer affecting plasma cells in the bone marrow. The study evaluates a new drug called iberdomide (also known as CC-220) both alone and in combination with other established treatments including dexamethasone and daratumumab. The purpose is to determine the highest safe dose of iberdomide and to assess how well it works in treating patients whose cancer has returned or did not respond to previous treatments.
The treatment involves taking iberdomide capsules by mouth, either alone or together with other medications. Some participants will receive dexamethasone tablets orally, while others may also receive daratumumab as an injection under the skin. The study has multiple parts to test different drug combinations and doses.
The researchers will monitor how patients respond to the treatment by measuring changes in their cancer, tracking side effects, and studying how the body processes the medication. They will also look at how long the treatment keeps the cancer under control and how long patients survive after starting treatment. The study is expected to continue until early 2028.



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