I was diagnosed with ADHD at age 13 when my parents were at a loss as to why I could not focus on my schoolwork and homework. They gave me Ritalin at the time,

I was diagnosed with ADHD at age 13 when my parents were at a loss as to why I could not focus on my schoolwork and homework. They gave me Ritalin at the time, which only made me hostile (their words; I don't recall)