"Will I think different thoughts or lose my sense of humor by taking a stimulant?"
Larry Silver, M.D.
As long as the dosage is correct, the medication should not affect your personality or sense of humor. What it will do is curb your hyperactivity, inattention, and impulsivity.
An excessively high dose could temporarily “flatten” your personality, causing you to seem unusually quiet or withdrawn. If you or someone close to you notices such changes after you start taking the drug, alert your doctor. He can lower the dose or switch you to another drug.
Any changes to your personality are transient. If you don't like the way you feel when on a stimulant, tell your doctor that you'd like to stop taking it.