Lamictal is one of those medications I actually like prescribing, which is not a sentence I get to write very often in psychiatry.
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Lamictal is one of those medications I like prescribing, which isn’t a sentence I get to write very often in psychiatry. The guys on it tend to stay on it for years and they don’t complain about it, which is unusual. Most psych meds, half the appointment is hearing what the drug is doing wrong… patient gained twenty pounds, can’t get hard anymore, brain feels foggy, feels flat, sleep got weird. Lamictal mostly doesn’t do any of that. That’s most of the reason I reach for it.
It’s an antiepileptic (a seizure medication, originally) that turned out to be a mood stabilizer. The mechanism is something about voltage-gated sodium channels and glutamate release, which is a fancy way of saying we know which knobs it’s turning but not exactly why it works. For our purposes it keeps the bottom of your mood from falling out. If you’ve got bipolar II (the version where the lows are the problem and the “highs” are mostly just feeling productive for a few days), this is the drug.
For acute mania, full-blown bipolar I, manic-and-not-sleeping-for-a-week, Lamictal does nothing. If you’re hypomanic right now and you need to come down tonight, that’s lithium or Seroquel. Lamictal is the slow drug that keeps the floor from dropping out from under you over the long haul, and it’s no good at all when there’s already a fire to put out.
The titration is real and you can’t skip it
There’s one famous risk and it’s the one you’ve probably already googled: Stevens-Johnson syndrome, a severe skin reaction that in its worst version peels the top layer of your skin off and lands you in a burn unit. It’s rare and it’s scary and the rule about it is simple. The risk goes up if you ramp the dose too fast, so we don’t ramp it fast.
Standard titration is 25mg daily for two weeks, then 50mg daily for two weeks, then 100mg for a week, then 200mg, which is where most adults end up. That’s five or six weeks before you’re at a dose that’s doing anything, and there’s no shortcut, no version where you skip the slow part. If somebody (a previous prescriber, a friend, somebody on Reddit) tells you it’s fine to start at 100mg, that person is a damn liar and you shouldn’t listen to them.
If you’re also on Depakote (valproate, another mood stabilizer), the starting dose is half. Depakote jacks up Lamictal levels in your bloodstream. Going the other way, if you’re on Tegretol (carbamazepine, an older seizure drug) or an oral contraceptive with estrogen, those clear Lamictal out of your system faster, so you may end up needing a higher dose. The starter pack has a titration card in it for a reason. Use the card.
About the rash
Most rashes on Lamictal aren’t Stevens-Johnson. Most are regular drug rashes that come and go and don’t mean much. The problem is no prescriber can tell which is which from a photo you text us on a Friday afternoon, so the rule is simple, almost annoyingly so. Any rash in the first eight weeks, stop the drug and call. If the rash is near your mouth, your eyes, or your groin, or if you’ve got a fever with it, that’s the ER, tonight, not tomorrow morning, not after you finish whatever you were doing. The ER.
The lifetime risk of Stevens-Johnson on Lamictal if you titrate correctly is about one in a thousand, maybe lower. The risk of another depressive episode in untreated bipolar II is about as close to certain as this field gets, and it climbs the longer you wait (Judd et al. 2003). The next one is coming and you don’t get to know when. That’s the trade, and most patients, once they’re walked through the math, are fine with it.
What’s nice to hear about Lamictal
Here’s the part that doesn’t get said enough, because the conversation gets dominated by the rash warning. Lamictal mostly doesn’t make you feel like you’re on a medication at all, no sedation, no zombie fog, no flatness. You just don’t slide into the four-month depressive episode that was going to flatten you. The drug runs in the background and your life keeps going, which is what psychiatric medication is supposed to do and so rarely manages.
The most common side effect is a headache during the titration weeks, which usually clears by week four. Mild nausea, same deal, fades. A small group of patients get a flat affect on it, where they describe feeling slightly less than themselves, and for those guys we either drop the dose or switch. Maybe ten percent get insomnia, in which case we move the dose to the morning (FDA Lamictal label). None of those are deal breakers for most people.
What it doesn’t do, and this is the part that matters, is the stuff the other options do. No weight gain, no sexual side effects worth mentioning, no sedation, no blood draws every three months. Lithium has the data but it also has all four of those things. Depakote will fatten you up and hand you tremors. Atypical antipsychotics like Seroquel will work but you’ll wake up at 230 pounds in eight months. Lamictal doesn’t do any of that, which is another tick in the Lamictal-is-better column for the bipolar II crowd specifically.
What gets called depression but is really bipolar II
A real chunk of guys who come in with “treatment-resistant depression” turn out to have bipolar II that nobody asked about. The hypomanic stretches don’t feel like a problem because the guy’s getting things done, sleeping less, productive, kind of charged up, and he figures those were just good weeks. Then the depression lands four months later like a truck, and nobody connects the dots until somebody walks through the timeline with him.
The thing that should get a prescriber asking the question is the guy who’s had two or three discrete depressive episodes that lasted a few months each, with stretches of being totally fine in between, plus periods in his twenties or thirties where he barely slept for three or four days at a time and felt great about it. That’s the picture. SSRIs (the standard first-line antidepressants like Lexapro or Zoloft) can sometimes make bipolar II worse, kicking patients into a mixed state or destabilizing the mood pattern further (Pacchiarotti et al. 2013), which is why getting the diagnosis right before the prescription matters.
The patient where Lamictal earns its keep
The kind of guy who comes in saying “I keep getting depressed every couple of years, the antidepressants help a little but not really, and my wife says I disappear into the couch for a few months at a time” is often the guy who’s been carrying bipolar II for a decade without a name on it. The spouse-reported pattern is gold here, because the patient himself usually can’t see the cycle from inside it. He just feels like himself when he’s up, and miserable when he’s down, and the gaps between feel like regular life.
Once Lamictal gets to 200mg and stays there for a few months, the most common report from spouses is “he just seems more consistent.” Nothing dramatic, nobody’s getting transformed into some high-functioning new person, the bad weeks are just bad weeks now instead of episodes and the good stretches don’t crash into anything four months later. The patient himself usually has a harder time saying what’s different, because you don’t really feel an episode that never showed up, you just feel its absence.
Most psych meds, half the appointment is hearing what they’re doing wrong. Lamictal mostly doesn’t do those things.
Where I land on medication, and where you land is up to you
The thing that gets buried in conversations about mood stabilizers is who actually gets to decide. If you’re sitting here with a bipolar II diagnosis and you want to try the medication, you get the medication. I’m a provider, not a parent. My job is to give you the real take on what’s likely to work and what the trade offs are, and your job is the choice. I hardly ever say no on Lamictal specifically, because the side effect profile is so clean that the worst case for most patients is “we tried it for a few months and it didn’t help much,” which is a perfectly tolerable place to land.
If you want to see what you can do without medication first, you’ve got some real levers. Name the bipolar II out loud and treat it as the thing it is instead of “I get sad sometimes.” Tighten up your sleep, because sleep loss is the most reliable trigger for both the hypomanic episodes and the depressive ones. Cut back on the booze, because alcohol is fuel for both poles. Do that and you can put a real dent in it. Some guys manage that way. Others get six months in and realize the structural stuff isn’t going to be enough on its own and they want the drug. Both choices are fine. Both are common.
What not to do
Don’t double up on a missed dose. If you miss more than three or four days in a row, call before you restart. The rash risk resets to baseline after that long off the drug, which means we may need to re-titrate from 25mg, which is annoying but a lot less annoying than the burn unit.
Don’t drink heavily on it… not because there’s some dangerous interaction lurking underneath, just because alcohol is a depressant and you’re on a medication for depression, and the math on that doesn’t really pencil out. A beer with dinner, fine. Five beers on a Saturday is going to feel worse than it used to, and you’re going to wake up Sunday convinced the drug isn’t working when really you just sabotaged it.
Tell your prescriber if you’re starting or stopping an oral contraceptive (relevant for the guys reading this with wives or girlfriends in mind, because the contraceptive change affects the levels in your bloodstream). It moves your levels around and we may need to adjust the dose.
If you see a rash in the first eight weeks, you call. Don’t take a photo and decide on your own. Don’t text your wife to look at it and ask her what she thinks. Call.
Bipolar II with depressive episodes
Works best when the lows are the problem and the highs are barely visible. Less impressive for full bipolar I and useless for acute mania happening right now.
Five or six weeks, slow on purpose
25mg for 2 weeks, 50mg for 2 weeks, 100mg for a week, 200mg target. Halve all of that if you’re on Depakote. Don’t skip the slow part.
Any rash in the first 8 weeks, stop and call
Mouth, eyes, groin, or fever with the rash = ER tonight. The Stevens-Johnson risk is real but rare; the rule is what keeps it rare.
Bottom line
For bipolar II depression, Lamictal is what I start with most of the time. The titration is six weeks of slow building and paying attention to your skin, and after that, for most people, it just runs in the background and they go on with their lives without thinking much about it. The drug doesn’t ask for attention, it doesn’t make you feel different, it doesn’t wreck your sleep or your sex life or your scale. It just shows up and does its job quietly, which is the whole point of a psychiatric medication and almost the only time you’ll catch one pulling it off.
Sources
- Geddes JR, Calabrese JR, Goodwin GM. Lamotrigine for treatment of bipolar depression: independent meta-analysis and meta-regression of individual patient data from five randomised trials. Br J Psychiatry. 2009;194(1):4-9. PMID 19118318.
- Judd LL, Akiskal HS, Schettler PJ, et al. A prospective investigation of the natural history of the long-term weekly symptomatic status of bipolar II disorder. Arch Gen Psychiatry. 2003;60(3):261-269. PMID 12622659.
- Lamotrigine (Lamictal) US prescribing information, adverse reactions. U.S. Food and Drug Administration / DailyMed. DailyMed.
- Goodwin GM, Bowden CL, Calabrese JR, et al. A pooled analysis of 2 placebo-controlled 18-month trials of lamotrigine and lithium maintenance in bipolar I disorder. J Clin Psychiatry. 2004;65(3):432-441. PMID 15096085.
- Mockenhaupt M, Messenheimer J, Tennis P, Schlingmann J. Risk of Stevens-Johnson syndrome and toxic epidermal necrolysis in new users of antiepileptics. Neurology. 2005;64(7):1134-1138. PMID 15824335.
- Pacchiarotti I, Bond DJ, Baldessarini RJ, et al. The International Society for Bipolar Disorders (ISBD) task force report on antidepressant use in bipolar disorders. Am J Psychiatry. 2013;170(11):1249-1262. PMID 24030475.
