Overview
11 DESCRIPTION KYGEVVI is a combination of doxecitine and doxribtimine, both of which are pyrimidine nucleosides. KYGEVVI is a powder for oral solution. Both doxecitine and doxribtimine are white to off-white powders and soluble in water. Doxecitine The chemical name of doxecitine is 4-Amino-1-((2R,4S,5R)-4-hydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)pyrimidin-2(1H)-one.
Mechanism of Action
12 CLINICAL PHARMACOLOGY 12.1 Mechanism of Action Administration of KYGEVVI is intended to incorporate the pyrimidine nucleosides, deoxycytidine and deoxythymidine, into skeletal muscle mitochondrial deoxyribonucleic acid (DNA). This action restores mitochondrial DNA copy number in TK2d mutant mice. 12.2 Pharmacodynamics The exposure-response relationship and time course of pharmacodynamic response for the safety and effectiveness of KYGEVVI have not been fully characterized. 12.3 Pharmacokinetics Following oral administration of doxecitine and doxribtimine in healthy adult subjects, the baseline-adjusted maximum plasma concentration (C max ) and area under the plasma concentration-time curve (AUC) increased in a less than dose proportional manner for doxecitine at doses ranging from 43...
Indications
- 1 INDICATIONS AND USAGE KYGEVVI is indicated for the treatment of thymidine kinase 2 deficiency (TK2d) in adults and pediatric patients with an age of symptom onset on or before 12 years. KYGEVVI is a combination of doxecitine and doxribtimine, both pyrimidine nucleosides, indicated for the treatment of thymidine kinase 2 deficiency (TK2d) in adults and pediatric patients with an age of symptom onset on or before 12 years. ( 1 )
Common Doses
- 260 mg
- 130 mg
- 520 mg
- 800 mg
Dosage
2 DOSAGE AND ADMINISTRATION Obtain baseline transaminase (alanine aminotransferase [ALT] and aspartate aminotransferase [AST]) levels in all patients prior to treatment initiation. ( 2.1 ) Recommended dosage ( 2.2 ): KYGEVVI Dosage Level KYGEVVI Dosage (mg/kg/day) Starting 260 mg/kg/day (consisting of 130 mg doxecitine and 130 mg doxribtimine) Intermediate 520 mg/kg/day (consisting of 260 mg doxecitine and 260 mg doxribtimine) Maintenance 800 mg/kg/day (consisting of 400 mg doxecitine and 400 mg doxribtimine) Titrate to the next dosage level based on tolerability after a minimum of 2 weeks at...
Contraindications
- 4 CONTRAINDICATIONS None. None. ( 4 )
Side Effects
- 6 ADVERSE REACTIONS The following clinically significant adverse reactions are described elsewhere in the labeling: Elevated Liver Transaminase Levels [see Warnings and Precautions (5.1) ] Gastrointestinal Adverse Reactions [see Warnings and Precautions (5.2) ] Most common adverse reactions (incidence ≥5%) are diarrhea, abdominal pain (including abdominal pain upper), vomiting, alanine aminotransferase increased (ALT), and aspartate aminotransferase increased (AST). ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact UCB, Inc. at 1-844-599-2273 or FDA at 1-800-FDA-1088 or www.fda.
Interactions
- No major interactions listed on the FDA label. Always consult a healthcare professional.