"took 18mg concerta for 5 days. on day two, i woke up and cleaned and tidied the whole house, my partner thought something was wrong with me! then the side effects came... nausea, depression, anxiety. by the time i was coming down at around 3pm i had to stay at home, i was unable to drive my car or even just go out. my doc wanted to try me on 5mg ritalin 3x a day quick release but i refused. after reading the reviews on here about dexamphetamine i started them this morning. 5mg 3x a day. hopefully this will be the one for me."