I used to take Lithium Carbonate, which is the prescription form of lithium, commonly prescribed for Bipolar Disorder. I took it for over a year, and then I began getting a tremor from it.
I decided to try Lithium Orotate. To my surprise, this has been working as well as the Lithium Carbonate. Except I don't have the tremor side effect.
I don't notice any side effects with Lithium Orotate. I do notice problems if I don't take it though, so I take it regularly. I take it as seriously as I would take a prescribed medication.
It doesn't make me feel drugged, or less motivated, or less creative, or anything negative. It just makes me feel normal. Oh, I still occasionally have Bipolar Disorder related mood problems, but certainly not as severe as without the lithium. Lithium orotate is not a cure, but it comes close. It reduces many of my symptoms of both mania and depression.
I buy the 120 mg dosage (containing 4.8mg of elemental lithium) by Advanced Research. For awhile I was only taking 3 pills day, but I now I take 4 pills a day. I take 2 pills in the morning and 2 in the evening. It is hard to figure out the correct dosage. I think it has to do with individual differences and perhaps how much you weigh. Some people only take one or two pills a day. Best to consult your doctor.
I buy this Lithium Orotate from iherb.com If you haven't shopped at iherb before, you can get a $5 coupon for your first order by using this referral code: LIN282
There isn't any scientific proof that Lithium Orotate really works. Doing some internet searching, I've actually found more links about how it doesn't work than about how it does. However, there are many positive reviews on iherb.
By the way, it is also sold under the brand name Serenity.
Wikipedia does have a useful summary of it here. It has also been used to treat alcoholism, aggression, and more.