I already wanted to reproach you for inattention, but then I realized that you were looking at a slightly different description. What you are referring to is the instructions for the medicine Angiozil Retard, which contain trimetadizine. But on the same site there is an instruction directly to trimetadizine:
Триметазидин, таблетки, покрытые пленочной оболочкой, 20 мг. Показания, противопоказания, режим дозирования, побочное действие, передозировка, лекарственное взаимодействие КАНОНФАРМА ПРОДАКШН
www.vidal.ru
scrolling down a bit, you will definitely see this:
"
Применение у детей
Применение препарата у детей и подростков в возрасте до 18 лет противопоказано (эффективность и безопасность не установлены)."
translate:
"
Use in children
The use of the drug in children and adolescents under the age of 18 years is contraindicated (efficacy and safety have not been established)."