People some time mean AC as MS yet they are meant usually for epileptic i.e. used
for BP off-label (e.g lamictal). Whereas AP
for schizophrenia mainly also
for BP off-label so usually used for BP in psychosis. The only MS i know of in books is the lithium. So why people can't be more clear saying instead of you should use an MS just say you should consider lithium. Some articles (medical) say there is no agreement on the meaning of an MS.