Doxecitine/doxribtimine

Doxecitine/doxribtimine
Doxecitine (top) and doxribtimine (bottom)
Combination of
DoxecitinePyrimidine nucleoside
DoxribtiminePyrimidine nucleoside
Clinical data
Trade namesKygevvi
AHFS/Drugs.comkygevvi
License data
ATC code
Legal status
Legal status
Identifiers
KEGG

Doxecitine/doxribtimine, sold under the brand name Kygevvi, is a fixed-dose combination medication used for the treatment of thymidine kinase 2 deficiency. It contains the pyrimidine nucleosides, doxecitine (deoxycytidine) and doxribtimine (thymidine).

The most common side effects include diarrhea, vomiting, increase in liver enzymes, and abdominal pain.

Doxecitine/doxribtimine was approved for medical use in the United States in November 2025.