Erectile tissue in the clitoris and penis. Cross section showing the two corpora cavernosa near the top surface of the penis, and the corpus spongiosum surrounding the urethra near the bottom surface.
Adderall (amphetamine and dextroamphetamine) is a stimulant that affects chemicals in the brain that are associated with hyperactivity and impulse control. Adderall is used in attention deficit hyperactivity disorder (ADHD).
Of these causes, drugs are the most common cause overall, followed by mental disorders. Rarely, certain antibiotics and drugs used to treat high blood pressure cause changes in personality and behavior. Less commonly, Lyme disease, sarcoidosis, syphilis, or a vitamin deficiency causes personality and behavior changes.