[Verse 1]
Trigeminal neuralgia — electric bolts across the face,
Carbamazepine step up, the first-line holding its place,
Sodium channel blocker, slamming that voltage gate,
But before you even dose it, check the HLA straight —
HLA-B fifteen-oh-two, Southeast Asian descent,
Stevens-Johnson syndrome lurking if you don't prevent,
Oxcarbazepine cousin, cleaner on the liver side,
But hyponatremia creeping — check those sodium tides,
Salt dropping in the bloodstream, patients feeling strange,
Monitor electrolytes across the therapeutic range
[Chorus]
Carba-carba-mazepine, watch the sodium drop,
HLA screening, agranulocytosis don't stop,
Enzyme induction burning through the cytochrome chain,
Oxcarbazepine cousin, different but the same refrain —
Block that voltage channel, kill the trigeminal pain,
Screen before you prescribe or the harm will remain
[Verse 2]
Agranulocytosis — that's your white count crashing low,
Carbamazepine notorious, CBC before you go,
Enzyme induction raging through CYP three-A-four,
Your warfarin, your contraceptives falling through the floor,
Oral birth control patients — counsel hard on this,
Drug interactions multiplying, nothing you can miss,
Oxcarbazepine milder on the induction side,
Still pulls CYP three-A, though the pull ain't as wide,
Hyponatremia more pronounced with oxy than with carb,
Elderly patients especially — monitor each scar
[Chorus]
Carba-carba-mazepine, watch the sodium drop,
HLA screening, agranulocytosis don't stop,
Enzyme induction burning through the cytochrome chain,
Oxcarbazepine cousin, different but the same refrain —
Block that voltage channel, kill the trigeminal pain,
Screen before you prescribe or the harm will remain
[Verse 3]
Now the niche players rolling through the second row,
Lamotrigine — slow titration, rash is all you know,
Stevens-Johnson risk again if you escalate too fast,
Valproate for neuropathic — weight and liver last,
Teratogenic warning, neural tube defects loom,
Topiramate the weight-loss one, kidney stones in bloom,
Carbonic anhydrase inhibitor under the hood,
Cognitive side effects — patients call it brain-fog food,
Lacosamide enhancing slow inactivation clean,
Sodium channel modulator, the most nuanced we've seen
[Bridge]
Here's your word for the day — luculent — meaning clear,
Perfectly transparent, luminous, no smear,
A luculent diagnosis guides the drug you choose,
Carbamazepine for trigeminal, nothing left to lose —
but screen the HLA, check the sodium level twice,
Enzyme induction costs you — every drug has its price
[Chorus]
Carba-carba-mazepine, watch the sodium drop,
HLA screening, agranulocytosis don't stop,
Enzyme induction burning through the cytochrome chain,
Oxcarbazepine cousin, different but the same refrain —
Block that voltage channel, kill the trigeminal pain,
Screen before you prescribe or the harm will remain