Ziac is for high blood pressure
and I doubt you have this at 20! Do you know why it was given to you?
Imitrex is for migraines, do you get migraine headaches? Lexapro is used to treat anxiety and obcessive compulsive disorders (OCD). This is where one keeps doing something repeatedly, like handwashing, cleaning, checking locks, etc. People with OCD often have ADHD as well. Lexapro can calm you and help you concentrate, but it doesn't sound like it's working for you.