Lamictal is a preferred method of treating the depressive phase of the manic depressive illness. It does little to nothing to the manic phase. For some folks, little, and for others, nothing. Its classification as a mood stabilizer is thus somewhat misleading; it stabilizes from depression to baseline, yes, and, by removing the edge of the depressive phase, it indirectly prevents mania, both because the episodes of bipolar often depend on one another - mania is followed by depression and vice versa, so having less depression results in having less elevation, and, also, because Lamictal reduces or eliminates the use of AD that CAN flip a bipolar person into mania. In that sense, the classification as a mood stabilizer as warranted - Lamictal, as opposed to AD's, does not pose the danger of doing too much, i.e. flipping a person into mania; the role of Lamictal is to reduce the depression without causing mania, and in that sense, yes, it is a MS. So it is confusing to some extent.

Since you have a good, trustworthy dr., just keep reporting your symptoms and you will get the help you need.