There are the anti-psychoitc meds that control manias, and there are anti-depressants which can control depression, but also cause mania. Then there is Seroquel which IS and anti-psychotic but depending on the dose can be used for mania or depression (or even as a sleep aid).
Lamictal is different. It's not an SSRI, it is an anti-seizure med and it is the only non-SSRI that lifts mood. I love Lamictal - probably wouldn't be alive still without it.