"i&#039;ve only experienced two side effects while taking this medication: lethargy, which is intermittent, and prolonged orgasm - which i enjoy.  it does it&#039;s job, making emotions much easier to control.  i thought taking this would make me happy all the time, but i didn&#039;t notice anything like a &quot;switch&quot; going on or off.  i&#039;m glad, i still have emotions, they are just more muted - the bad ones.  again, love this medicine for it&#039;s ability to prolong ejaculation."