bipolar disorde
"I have been taking 1200mg daily (900mg daily 1/2 of the time), but for over 18 years.  This drug does appear to soften the lows and highs.  However extreme moods still occur while on this drug, it appears to be effective.  This seems to be the staple Bipolar drug, and many cocktails prescribed by doctors include this.  I have not seen any bad side effects from this, other than being very thirsty from time to time.  With that, I do carry more water weight than the average person.  I know this because I will often weigh myself before going to sleep, then go to the bathroom various times through the night and morning, and find that I "lose" upwards to 5 pounds.  The yearly or 6 month blood tests are annoying, but so far my kidneys are okay."