Converting Vyvanse to Concerta

Introduction to Conversion

The American Academy of Child and Adolescent Psychiatry recommends starting Concerta at 36mg once daily in the morning when switching from Vyvanse 40mg, as there is no established direct dose equivalency between lisdexamfetamine and methylphenidate, requiring empiric dosing with subsequent titration based on clinical response 1

Lisdexamfetamine and methylphenidate are fundamentally different medication classes with distinct mechanisms of action and pharmacokinetics, making direct dose equivalency calculations impossible 1

The American Academy of Child and Adolescent Psychiatry expects immediate therapeutic effects within hours of the first Concerta dose, similar to other stimulant medications, and full clinical benefit does not require weeks of treatment 1

The Mayo Clinic recommends monitoring blood pressure and heart rate, as cardiac conduction effects can occur with methylphenidate 2

The American Academy of Child and Adolescent Psychiatry advises against assuming equivalent efficacy at any particular dose ratio, as individual response varies significantly between amphetamine and methylphenidate classes 1
The American Academy of Child and Adolescent Psychiatry warns against attempting mathematical dose conversions based on stimulant equivalency tables, as these are unreliable for cross-class switches 1
The American Academy of Child and Adolescent Psychiatry recommends avoiding taking Concerta with high-fat meals if consistent timing relative to food intake cannot be maintained, as this can affect absorption 1