Ritalin (methylphenidate) and lisdexamfetamine (commonly known by the brand name Vyvanse) are both medications used to treat Attention Deficit Hyperactivity Disorder (ADHD), but they differ in several key aspects:
1. **Chemical Structure**:
- **Ritalin** (methylphenidate) is a central nervous system stimulant and has a different chemical structure than lisdexamfetamine.
- **Lisdexamfetamine** is a prodrug, meaning that it is inactive until


