Lithium
"Lithium provides a ton of stability for ultra-rapid cyclers.  The drawbacks are it interacts with almost everything in certain ways and it is fairly hard on the liver.  My primary care physician and psychiatrist work together to try to provide options that won't affect my liver as much as a result.  Because of the amount of stability it provides, I don't think I'll ever be able to go off of it.  I may be able to lower it by trying changes to other things.  But it just works too well at giving stability.  I don't like when the pharmacist says it out loud because it's a dead giveaway of what you're taking it for.  "