 [ Symptoms ] my ex wife keeps messing with my sons dosage of his adhd medicine dextroamphetamine is that safe  my ex wife keeps messing with my sons dosage of his adhd medicine dextroamphetamine is that safe she on her own says i dont think that he needs his second dose if he is not in school so every few days she is changing up his dosage [ Disease ] with his doctor is knowledge many parents can skip doses especially on weekends or late evenings so it is safe she should not be increasing his dosage without the expressed okay from his doctor however