experience on the new serenity pill,anyone

Has anyone tried the Serenity Pill , which is a form of lithium? It supposedly has less side effects and better tolerated. Is it stronger than than the regular lithium? The lithium that my significant other takes worked when he started taking it because the mania frequency dropped, but now it's gotten worse. He wants to be stable, but his thinking is eveywhere. He can't help it.