Almost every bipolar medication has some very scary side effects (either in the medium or the long term). Sadly receiving treatment for it is a constant balance of "If you do not treat it it might destroy your life" and "if you do treat it it might destroy your life".
For those bipolar folks out there, remember even lamotrigine can cause SJS (still very rare), which is why you should always ramp up the dose gradually. [2]
[1] https://www.fda.gov/drugs/drug-safety-and-availability/quest...
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3905385/