Does food affect the effect of Medikinet CR and what should I do if I do not see the effect of the treatment?

According to the manufacturer: "Medikinet CR should be taken with or after food to achieve a sufficiently long duration of action and to avoid rapid increases in plasma concentrations of the active substance. Methylphenidate hydrochloride is absorbed from Medikinet CR much more rapidly when this medicinal product is taken in an empty state. In this case, the release of the active substance may not be sufficiently prolonged. Therefore, Medikinet CR should not be taken without food." "Medikinet CR should be administered in the morning and lunchtime, with or after food." If the therapy is not effective enough, you should consult your doctor. I enclose a link to an article that may be helpful: https://www.gdziepolek.pl/artykuly/adhd-choroba-czy-wymysl