Doxecitine + doxribtimine treats children and adults with genetically confirmed thymidine kinase 2 deficiency whose symptoms began at or before 12 years of age. The disease impairs energy production in muscles. These medicines provide mitochondrial DNA precursors and may improve motor function, although their mechanism in humans is not fully confirmed.
Dissolve the powder in water and take it orally in three equal daily doses with food. A specialist calculates the dose by body weight and increases it gradually according to tolerability. Use the recommended measuring devices, not household spoons. Administration through a feeding tube requires specific instructions.
Important side effects are diarrhoea, vomiting, abdominal pain and increased liver enzymes. Digestive fluid losses can cause dehydration and electrolyte imbalance, especially in children. Liver tests are needed before treatment and during follow-up; the doctor may reduce the dose or temporarily interrupt treatment.
Contact the doctor urgently for severe diarrhoea, repeated vomiting, reduced urination, unusual sleepiness, jaundice or dark urine. Report pregnancy, breastfeeding and kidney disease. Treatment does not cure the genetic defect or replace breathing support, nutritional care and rehabilitation. Benefit is assessed through changes in strength and movement.