Synribo (generic: omacetaxine) is a prescription medication used to treat chronic myeloid leukemia (cancer of the white blood cells) in adults.  Synribo belongs to a group of drugs called protein synthesis inhibitors, which slow the growth of cancer cells.

This medication comes in an injectable form to be given just under the skin twice daily for 14 days of a 28-day cycle.

Common side effects of Synribo include diarrhea and a decrease in platelets, red blood cells, and white blood cells.  Synribo can cause drowsiness.