Risperidone
"I was prescribed this by both my Psychiatrist and Therapist at age 35 for Asperger's Syndrome.  It works like shock therapy - you will feel better just so you don't have to take this any more.  0.25 mg (Half of the lowest dose) causes, for me: stomach cramps, headache, dizziness, feeling like my heart was racing, the 'munchies' (I go eat lots of potato chips), falling asleep, then waking up disoriented, and dry mouth.  I can't imagine the highest dose.  I'd probably die.  I had very vivid dreams.  However this medicine seemed to cure my irritability and nightmares which is what it was prescribed for.  The side effects it causes, however, are worse."