This is false. I don’t know what this author was doing. Even reading Wikipedia would give you a better understanding than that.
Initial treatment for patients presenting with acute mania are antipsychotics like Risperdal or Geodon. After that they might try mood stabilizers like lamotrigine or seroquel, or any number of other things that are much more recent than lithium.
If you want to learn more about the wild world of psychopharmaceuticals, I recommend crazymeds.com, which also tells you a lot about how mentally ill people often view themselves. It’s fascinating even if you’re not crazy.