Is ritalin the same chemical as methylinAdderall is a central nervous system stimulant that affects chemicals in the brain . . . . Ritalin . the articles; those same . . . Learn about the prescription medication Methylin . other words, you’ve just received a prescription that has the same chemical compound as Ritalin . Methylin Vs. . . . . . . What is the normal adult dose of methylin? Is Methylin ER the same as Ritalin SR?ADHD Home > HealthPages > Ritalin Chemical Formula . . . . .... more