Lamictal (lamotrigine)

Lamictal is one of those medications I actually like prescribing, which is not a sentence I get to write very often in psychiatry. The people 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 those things. 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, technically. The mechanism is something about voltage-gated sodium channels and glutamate release, which is a 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 need to come down tonight, lithium or Seroquel. Lamictal is the long game, the keep-the-floor-from-dropping-out game, not the put-out-the-fire game.

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 actually doing anything. There’s no shortcut, there’s no version where you skip the slow part, and 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 should not 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 basically a hundred percent… that’s not just some shit I’m saying. The next one is coming and you don’t get to know when. That’s the trade. 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. You don’t feel sedated, you don’t feel zombified, you don’t feel flat. 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 continues. Which is supposed to be the point of psychiatric medication and almost never actually is.

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. None of those are deal-breakers for most people.

What it doesn’t do, and this is the part that matters: weight gain, sexual side effects worth mentioning, sedation, 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 that’s actually 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 patient’s getting things done, sleeping less, productive, kind of charged up, and they think those were just good weeks. The depression lands four months later like a truck. Nobody connects the dots until somebody walks through the timeline with them.

The pattern 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 periods of being totally fine in between, plus stretches 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, 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 with “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 patient who’s been carrying bipolar II for a decade without a name on it. Spouse-reported pattern is gold here, because the patient himself often 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 just 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.” Not transformed. Not high-functioning. Just consistent… the bad weeks are bad weeks instead of episodes, the good stretches don’t crash into anything four months later. The patient himself often has a harder time describing what’s different, because the absence of an episode isn’t a sensation, it’s the lack of one.

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 the autonomy piece. 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 honest take on what’s likely to work and what the trade-offs are, 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-scenario answer for most patients is “we tried it for a few months and it didn’t help much,” which is a perfectly tolerable outcome.

If you want to see what you can do without medication first, naming the bipolar II out loud (and treating it as the thing it actually is instead of “I get sad sometimes”), tightening sleep hygiene because sleep loss is the most reliable trigger for both the hypomanic episodes and the depressive ones, cutting back on alcohol because alcohol is fuel for both poles, you can put a real dent in it. Some people manage. Others get six months in and realize the structural intervention 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 feeling like 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 patients reading this with wives or girlfriends in mind, because the contraceptive change affects the levels in your bloodstream). It changes your levels 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.

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. 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, doesn’t make you feel different, doesn’t wreck your sleep or your sex life or your scale. It just shows up. Which is, again, supposed to be the point of psychiatric medication.

Sources

1. 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.
2. 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.
3. 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.