Methylphenidate

Cancer-related fatigue is a common and debilitating late effect in pediatric brain tumor survivors. Currently, evidence-based recommendations to ameliorate this condition are lacking. The researchers will investigate the ability of methylphenidate to improve fatigue and cognition in pediatric brain tumor survivors suffering from cancer-related fatigue. Methylphenidate is a drug (central nervous stimulant) most commonly used in the treatment of hyperkinetic disorders such as attention-deficit/hyperactivity disorder (ADHD). If methylphenidate shows an effect, the prospects are important for this patient group, since methylphenidate may then be included as part of the treatment of brain tumor-related fatigue.

PHACYLOB PHArmaCokinetics of methYLphenidate in adult patients with Attention-Deficit Hyperactivity Disorder (ADHD) : comparison between patients with and without OBesity. Its aim is to determine whether, for a comparable treatment dose, there are differences in the pharmacokinetic of methylphenidate between ADHD patients with obesitý and ADHD patients but without obesitý. More specifically, we will assess whether blood concentrations of methylphenidate (MPH; long acting form) are significantly higher or lower in either group at different times of the day. To meet this objective, we are conducting this pharmacokinetic clinical trial with blood sampling and repeated clinical measurements just prior to MPH administration (= at T0) and then, at different times after administration, i.e. at times (T): T 30 minutes, T 1 hour, T2h, T3h, T4h, T6h, T8h after MPH administration. As far as MPH is concerned, this is the usual treatment. However, we may hypothesize that the distribution in the body may differ according to weight: hence the interest of this study

To explore the relationship of treatment-related changes in electrophysiology and those in metabolomics for identification of the underlying metabolic mechanisms for the electrophysiological effects of methylphenidate in children with ADHD.