How Narcolepsy Medications Work: Understanding the Effect of Medication on Narcolepsy and What to Expect from Treatment

Story-at-a-Glance

• Narcolepsy medications work by targeting specific neurotransmitter systems to compensate for the loss of orexin/hypocretin neurons. Different medication classes address different symptom profiles
• Traditional stimulants and wake-promoting agents like modafinil increase dopamine and histamine levels to combat excessive daytime sleepiness. These medications help 65-85% of patients improve alertness
• Sodium oxybate (and newer low-sodium formulations) uniquely treats multiple narcolepsy symptoms simultaneously. It reduces both cataplexy attacks and excessive sleepiness while improving nighttime sleep quality
• Breakthrough orexin receptor agonists represent the first treatments that address the root cause of narcolepsy by directly replacing the missing orexin signal. Recent trials show patients achieving near-normal wakefulness
• Matching medication mechanisms to your individual symptom pattern dramatically improves treatment outcomes compared to one-size-fits-all approaches. Consider whether you primarily experience excessive sleepiness, cataplexy, or disrupted nighttime sleep
• The effect of medication on narcolepsy varies significantly between individuals, with some patients achieving 80-90% symptom improvement while others require combination therapy to manage their condition

The Question That Changes Everything

When a 42-year-old taxi driver finally received his narcolepsy diagnosis after living with symptoms his entire adult life, his first question wasn’t about prognosis or lifestyle changes. It was simpler, more immediate: “Will this medication help me drive again?”

His story, documented in a clinical case report, captures what most people with narcolepsy desperately want to know: Will these medications actually work for MY symptoms? The answer depends less on finding a “wonder drug” and more on understanding how different medications address different aspects of this complex sleep disorder. Research increasingly shows this personalized approach.

The effect of medication on narcolepsy has transformed dramatically over the past two decades. Where treatment once meant managing symptoms with amphetamines and hoping for the best, we now understand narcolepsy at a molecular level—and that knowledge is translating into medications that don’t just mask sleepiness but target the underlying mechanisms causing it.

Understanding What’s Actually Broken

Before we can grasp how medications work, we need to understand what narcolepsy does to the brain. It’s not simply “being really sleepy”—it’s the loss of approximately 70,000 specialized neurons in the hypothalamus that produce a wake-promoting neurotransmitter called orexin (also known as hypocretin).

Narcolepsy Type 1 results from an autoimmune destruction of these orexin-producing neurons. This leaves the brain without its primary “stay awake” signal. Think of it as losing the conductor of an orchestra—the musicians (other wake-promoting systems) are still there. But without coordinated direction, the performance falls apart.

This explains why narcolepsy isn’t just one symptom but a constellation: excessive daytime sleepiness, cataplexy (sudden muscle weakness), hypnagogic hallucinations, and sleep paralysis. Each reflects a different aspect of dysregulated sleep-wake transitions.

What fascinated Dr. Emmanuel Mignot, the Stanford researcher who discovered orexin’s role in narcolepsy, was how selective this destruction is. Mignot won the 2023 Breakthrough Prize for this work. The autoimmune process targets only these 70,000 neurons among the brain’s 100 billion. This precision both causes the disease and points toward targeted treatments.

The Medication Landscape: Four Distinct Approaches

1. Traditional Stimulants: Amplifying What Remains

Methylphenidate (Ritalin) and amphetamines were narcolepsy’s first treatments, and they remain widely used today. These medications help reduce daytime sleepiness in 65-85% of patients by preventing the reuptake of dopamine and norepinephrine. They essentially turn up the volume on the brain’s remaining wake-promoting systems.

Consider a 17-year-old woman who suffered for six years with excessive daytime sleepiness that her teachers dismissed as laziness. After misdiagnoses of depression and dissociative disorder, she was finally correctly diagnosed with narcolepsy and treated with modafinil. Within two weeks, her hallucination symptoms completely disappeared, and she could function normally again.

The challenge? These medications increase wakefulness but don’t touch cataplexy or nighttime sleep fragmentation. They’re also Schedule II controlled substances with potential for abuse and side effects including elevated heart rate and blood pressure.

2. Wake-Promoting Agents: A Gentler Awakening

Modafinil (Provigil) and its refined form armodafinil (Nuvigil) represent a significant advance. These medications likely increase alertness by raising brain dopamine levels. However, they do so with a smoother, longer-lasting effect than traditional stimulants.

Large clinical studies demonstrate that modafinil reduces feelings of sleepiness and moderately improves the ability to stay awake during testing. Most people find it works for about eight hours, making a morning dose sufficient—though some split the dose to maintain afternoon alertness.

A fascinating recent development: pitolisant (Wakix), approved by the FDA in 2019 for adults and expanded to children aged 6 and older in 2024. It’s a first-in-class histamine H3 receptor antagonist/inverse agonist that works through an entirely different mechanism, increasing histamine levels in the brain. Notably, it’s non-scheduled—the only narcolepsy medication without addiction potential.

But here’s the limitation that many patients highlighted in FDA focus groups: these wake-promoting agents, while reducing sleepiness, often provide only minimal relief. Some patients reported feeling like they had “toothpicks holding my eyelids open 24 hours a day”—awake but not restored.

3. Sodium Oxybate: The Multitasking Molecule

This is where narcolepsy treatment gets interesting. Sodium oxybate (Xyrem) doesn’t fit neat categories. Based on multiple randomized, double-blind, placebo-controlled clinical trials, sodium oxybate has fairly good efficacy and is active on all symptoms of narcolepsy.

Think about that: ONE medication that reduces cataplexy, improves nighttime sleep quality, AND decreases daytime sleepiness.

How? The mechanism isn’t fully understood, but research in animals indicates oxybates produce sedation by binding to GABA receptors. Paradoxically, by dramatically improving nighttime sleep architecture—particularly deep sleep—patients experience better daytime alertness.

In patient focus groups, some called it “a wonder drug” and “a miracle,” with one parent noting their 14-year-old son would have very low quality of life without it. The taxi driver mentioned earlier? After treatment with sodium oxybate and CPAP (he also had sleep apnea), he was cleared to drive again. He expressed complete satisfaction with the management provided, denying any excessive daytime sleepiness or cataplexy attacks since treatment began.

The downsides aren’t trivial: nausea appears as the main adverse effect, the medication requires twice-nightly dosing (taken in the middle of the night), and it contains extremely high sodium content. However, newer formulations address these issues. Xywav (low-sodium oxybate) contains 92% less sodium, and once-nightly extended-release versions (Lumryz) are now available, dramatically improving adherence.

4. The Game-Changers: Orexin Receptor Agonists

Here’s where we shift from symptom management to addressing the root cause. Remember those 70,000 lost orexin neurons? What if we could bypass them entirely by directly stimulating their target receptors?

Dr. Yves Dauvilliers, who coordinates France’s National Reference Network for narcolepsy at the University of Montpellier, led groundbreaking research on orexin receptor agonists. The 2023 study, published in the New England Journal of Medicine, tested oveporexton (TAK-861), an oral orexin receptor 2 agonist. The results were striking.

The 2.5 mg dose restored normative wakefulness with a mean sleep latency of 32 minutes on the Maintenance of Wakefulness Test—compare that to the typical 8-10 minutes for untreated narcolepsy. Previous treatments increased resistance to sleep by 3-4 minutes; this one doubled it, Dauvilliers reported.

What excites sleep medicine experts most is the mechanism. This type of medication acts on orexin receptors and would be a more physiological or cause-directed treatment—giving what is missing in the brain, like giving insulin to diabetics who lack it.

Multiple pharmaceutical companies are now racing to develop orexin agonists. Takeda’s oveporexton, Alkermes’ alixorexton (ALKS 2680), and Centessa’s ORX750 all showed promising results in 2024 trials. The FDA has already granted Breakthrough Therapy designation to Takeda’s drug, and applications for approval are expected soon.

Matching Medications to Your Symptom Profile

Here’s what a top 0.1% sleep specialist would emphasize: narcolepsy medication isn’t one-size-fits-all—it’s about matching medication mechanisms to individual symptom profiles.

Consider three different patients:

Patient A: Primary complaint is overwhelming daytime sleepiness. No cataplexy, nighttime sleep relatively intact. Best match? Modafinil or pitolisant as first-line treatment, potentially adding stimulants if insufficient.

Patient B: Experiences frequent cataplexy attacks (several daily) along with moderate sleepiness and severely disrupted nighttime sleep. Sodium oxybate would be the most effective choice, possibly combined with modafinil for optimal daytime function.

Patient C: Primarily cataplexy with minimal sleepiness. Antidepressants like venlafaxine can reduce cataplexy by up to 90% in some patients, though they lack high-quality evidence from randomized trials.

This personalized approach explains why approximately 30% of participants discontinued oxybates in recent 12-week clinical trials. The discontinuation wasn’t because the drug doesn’t work, but because it wasn’t the right match for their symptom profile or they couldn’t tolerate the side effects.

The Treatment Timeline: What to Actually Expect

Let’s be honest about something the brochures gloss over: finding the right medication or combination takes time and patience.

A six-year-old girl’s case illustrates the diagnostic journey’s complexity. She was misdiagnosed at eight different hospitals over 10 months before receiving accurate diagnosis and treatment. Once properly diagnosed, she showed obvious improvement—but the delay cost her family emotionally and financially.

Even with correct diagnosis, medication adjustment isn’t instant. One young girl prescribed venlafaxine showed significant improvement in daytime sleepiness and cataplexy after one month. The positive effects remained sustained at three months. But that’s best-case scenario.

More typically, patients try multiple medications before finding their optimal regimen. The FDA patient focus groups revealed complex trial-and-error treatment regimens. People described struggles finding long-term effective and tolerable therapies.

There’s also the possibility that symptoms change over time. One study showed that anti-cataplectic medications were stopped without recurrence of cataplexy at 10 years of follow-up in 42% of patients. Cataplexy can improve or even disappear with age, while sleepiness typically persists or worsens.

The Combination Strategy

Here’s something that surprised me when reviewing the research: the combination of sodium oxybate and modafinil may be even more effective than either alone.

This makes biological sense. Sodium oxybate works primarily on nighttime sleep architecture and cataplexy through GABA mechanisms. Meanwhile, modafinil addresses daytime dopamine signaling. They’re complementary, not redundant.

An 18-year-old female patient with classic Type 1 narcolepsy presented to specialists with severe cataplexy triggered by laughter. She would literally melt to the ground while remaining aware of her surroundings. For pediatric cases like hers, oxybate is the only FDA-approved option for age 7 and above. However, combination therapy with wake-promoting agents is often added.

The art of medication management, as one sleep specialist noted, involves helping patients understand the pathophysiology and why specific medicines are chosen. It’s not just throwing drugs at symptoms but building a rational treatment strategy.

Side Effects, Safety, and the Long View

No medication discussion would be complete without addressing the elephant in the room: side effects.

In integrated safety analyses of pitolisant trials, treatment discontinuation due to adverse events occurred in only 3.5% of patients—quite favorable. Common issues included headache and insomnia. However, no clinically relevant effects on vital signs or lab values appeared.

Sodium oxybate presents different challenges. Depression and suicidal ideation must be considered, making it inadvisable to prescribe to depressed patients. The twice-nightly dosing also creates adherence challenges. However, newer once-nightly formulations help.

Traditional stimulants carry the most concerning side effect profile: potential for abuse, cardiovascular effects, and the development of tolerance over time requiring dose escalation.

What about the new orexin agonists? The main reported adverse effects include insomnia, increased urinary frequency, salivary hypersecretion, and headache. However, no subjects dropped out of studies. Earlier versions showed liver toxicity, but molecular modifications eliminated this issue.

Behavioral Therapy: The Missing Piece

Medication dominates narcolepsy treatment discussions, but experienced clinicians stress that pharmacotherapy alone isn’t optimal. Patients require non-pharmacological treatment including behavioral modifications. These include regular nighttime sleep schedules, avoiding sleep deprivation, short scheduled naps, and work and school accommodations.

This connects to a relevant article on GreatSleep.blog about sleep hygiene’s role in managing narcolepsy symptoms behaviorally. The combination approach produces better outcomes than either alone. Medications address neurochemical deficits, while behavioral strategies optimize circadian rhythms.

Strategic napping deserves special mention. Unlike “giving in” to sleepiness, scheduled 15-20 minute naps can significantly reduce the need for medication escalation. One patient described how planned naps after meals, combined with medication, allowed him to function normally despite his condition.

The Diagnostic Delay Crisis

Here’s something that frustrates every narcolepsy specialist: clinical data suggests a significant delay in diagnosis. The mean time from symptom onset to diagnosis is 10-15 years.

Think about that. More than a decade of struggling, being labeled lazy, losing jobs, straining relationships—all while effective treatments exist.

Why? People assume sleep deprivation is the only factor causing drowsiness, but at 15 or 20, it’s not normal to be drowsy in class if you’ve had enough sleep at night, as Dr. Dauvilliers emphasizes. Teachers, parents, even primary care physicians often miss the signs.

The pediatric picture is particularly concerning. Children rarely experience all four cardinal symptoms of narcolepsy. They often have more prolonged onset and diverse symptoms, making diagnosis challenging. That six-year-old girl received eight incorrect diagnoses—including epilepsy, syncope, and mental disorders—before someone recognized narcolepsy.

Looking Forward: What’s Coming Next

The narcolepsy treatment landscape in 2025 looks dramatically different than even five years ago. In 2024 alone, pitolisant was approved for pediatric narcolepsy. Additionally, sodium oxybate expanded its pediatric indications.

But the real excitement centers on orexin agonists. Multiple drugs are progressing through late-stage trials. Some experts predict FDA approvals within 1-2 years. While initial results are promising, further research is needed to determine their impact on REM sleep-dissociative symptoms and disrupted nocturnal sleep.

There’s also growing interest in earlier intervention. Could immune-based therapies, if administered immediately after narcolepsy onset, prevent or slow the autoimmune destruction of orexin neurons? Several immune-based therapies have been tested including intravenous immunoglobulins and corticosteroids. However, no current evidence guides these approaches. Well-designed controlled trials near disease onset are needed.

And what about prevention? The Stanford Center for Narcolepsy found that following specific influenza infections, the immune system confuses a portion of the flu virus with orexin-related proteins. This confusion leads to destruction of the neurons. Understanding this molecular mimicry might eventually enable targeted prevention in genetically susceptible individuals.

The Bottom Line: Hope Mixed With Realism

So, will medication help YOUR narcolepsy symptoms? The honest answer: probably yes. However, how much depends on matching treatment to your specific symptom profile, tolerating potential side effects, and maintaining realistic expectations.

Current treatments enable most patients to regain approximately 80% of normal function. That’s life-changing—but it’s not a cure. The effect of medication on narcolepsy is substantial but rarely complete.

What gives me genuine optimism isn’t just the pipeline of new drugs, though that’s exciting. It’s the fundamental shift in how we understand and approach narcolepsy treatment. We’ve moved from “here’s a stimulant, good luck” to personalized medicine. This approach considers your individual symptom constellation, comorbidities, lifestyle factors, and treatment goals.

The 42-year-old taxi driver got to drive again. The teenager previously labeled lazy could stay awake in class. The young girl suffering cataplexy attacks triggered by laughter could laugh without collapsing. These aren’t miracle cures. They’re the result of careful medication selection, dose optimization, and combination with behavioral strategies.

If you’re living with narcolepsy or suspect you might have it, the most important step isn’t finding the “best” medication. It’s working with a sleep specialist who understands that optimal treatment requires matching medication mechanisms to your unique pattern of symptoms. And if initial treatments don’t work perfectly, that’s not failure—it’s information guiding the next adjustment.

The effect of medication on narcolepsy has never been more promising. But promise requires partnership between patient and clinician, patience during the optimization process, and persistence when first attempts fall short. That’s the reality. And increasingly, it’s a reality that allows people with narcolepsy to reclaim their lives.

FAQ Section

Q: What is narcolepsy?

A: Narcolepsy is a chronic neurological sleep disorder characterized by the brain’s inability to properly regulate sleep-wake cycles. It results from the loss of approximately 70,000 neurons in the hypothalamus that produce orexin (hypocretin), a neurotransmitter critical for maintaining wakefulness. The main symptoms include excessive daytime sleepiness, sudden sleep attacks, cataplexy (sudden muscle weakness triggered by emotions), hypnagogic hallucinations (vivid dream-like experiences when falling asleep), and sleep paralysis. Narcolepsy Type 1 includes cataplexy and low cerebrospinal fluid orexin levels, while Type 2 lacks these features.

Q: What is the difference between stimulants and wake-promoting agents for narcolepsy?

A: Traditional stimulants like amphetamines and methylphenidate (Ritalin) work primarily by preventing the reuptake of dopamine and norepinephrine, creating a strong, immediate wakefulness effect. Wake-promoting agents like modafinil (Provigil) and armodafinil (Nuvigil) also increase dopamine but produce a smoother, longer-lasting effect with fewer side effects. Pitolisant (Wakix) works through an entirely different mechanism by blocking histamine H3 receptors. The key distinction: stimulants are Schedule II controlled substances with addiction potential, while modafinil is Schedule IV and pitolisant is non-scheduled, making them safer for long-term use.

Q: How do orexin receptor agonists differ from other narcolepsy medications?

A: Orexin receptor agonists represent the first medications that address the root cause of narcolepsy rather than just managing symptoms. While stimulants and wake-promoting agents boost other neurotransmitter systems to compensate for missing orexin, orexin agonists directly stimulate the orexin receptors themselves—essentially replacing the signal from the lost neurons. This is analogous to giving insulin to people with diabetes. Early clinical trials show these medications can restore near-normal wakefulness levels, with patients staying awake 32 minutes during testing compared to 8-10 minutes when untreated. These drugs are still in late-stage trials but expected to receive FDA approval within the next few years.

Q: What is sodium oxybate and why is it considered so effective?

A: Sodium oxybate (brand name Xyrem) is the sodium salt of gamma-hydroxybutyrate (GHB), a substance that works on GABA receptors in the brain. What makes it unique is its ability to treat multiple narcolepsy symptoms simultaneously: it reduces cataplexy attacks by up to 90%, improves nighttime sleep quality by increasing deep sleep stages, and paradoxically decreases daytime sleepiness by consolidating nighttime sleep. It’s the only medication proven effective for all major symptoms of narcolepsy. The main drawbacks are twice-nightly dosing (though once-nightly formulations now exist), high sodium content (addressed by newer low-sodium versions like Xywav), potential for abuse (it’s a Schedule III controlled substance), and side effects including nausea.

Q: What is cataplexy and how is it treated?

A: Cataplexy is a sudden, temporary loss of bilateral muscle tone triggered by strong emotions—typically positive ones like laughter, surprise, or excitement. During a cataplexy attack, people remain conscious but may experience anything from slight facial sagging to complete collapse. It’s caused by REM sleep phenomena (muscle atonia) intruding into wakefulness due to dysregulated orexin signaling. Treatment depends on frequency and severity: antidepressants (particularly SNRIs like venlafaxine) can reduce attacks by enhancing norepinephrine and serotonin, which suppress REM muscle atonia. Sodium oxybate is even more effective, reducing cataplexy frequency by up to 90% in clinical trials. People with infrequent attacks (once or twice yearly) may choose not to treat it, while those with multiple daily episodes typically require medication.

Q: What does the Multiple Sleep Latency Test (MSLT) measure?

A: The MSLT is the gold-standard diagnostic test for narcolepsy. After a full night of polysomnography (sleep study), patients are given four or five 20-minute nap opportunities, spaced two hours apart throughout the day, in a dark, quiet room. The test measures two things: (1) how quickly you fall asleep (sleep latency), and (2) whether REM sleep occurs abnormally early (within 15 minutes of sleep onset, called Sleep-Onset REM Periods or SOREMPs). Narcolepsy is diagnosed when average sleep latency is 8 minutes or less AND two or more SOREMPs occur. Normal individuals take 10-20 minutes to fall asleep and don’t enter REM sleep during brief daytime naps. The MSLT also helps assess treatment effectiveness, as medications should increase sleep latency closer to normal ranges.

Q: Can narcolepsy be cured?

A: Currently, no. Narcolepsy results from the permanent, irreversible loss of orexin-producing neurons through an autoimmune process. Once these neurons are destroyed, they don’t regenerate. However, this doesn’t mean narcolepsy is untreatable—medications can very effectively manage symptoms, with most patients regaining approximately 80% of normal function. The exciting developments in orexin receptor agonists may provide even better symptom control by directly replacing the missing orexin signal. Future research directions include: (1) preventing the autoimmune destruction if caught early enough, (2) stem cell approaches to replace lost neurons, and (3) gene therapy to make other neurons produce orexin. Some patients do experience spontaneous improvement of certain symptoms (particularly cataplexy) over decades, though excessive daytime sleepiness typically persists.

Q: Why does diagnosis take so long—sometimes 10-15 years?

A: The diagnostic delay in narcolepsy reflects several factors: (1) Excessive daytime sleepiness is commonly attributed to insufficient sleep rather than a medical condition, especially in adolescents and young adults. (2) Symptoms often develop gradually rather than suddenly, making it hard to pinpoint when problems began. (3) Many primary care physicians have limited experience with narcolepsy, which affects only about 1 in 2,000 people. (4) Psychiatric symptoms like depression and hallucinations often lead to misdiagnosis, particularly when cataplexy is absent or mild. (5) Children rarely present with the complete symptom cluster, leading to misdiagnoses of epilepsy, ADHD, depression, or behavioral problems. (6) Cataplexy can be subtle—mild facial sagging or knee buckling—and is frequently missed or misattributed.

Q: What is the Epworth Sleepiness Scale (ESS)?

A: The Epworth Sleepiness Scale is a simple, validated questionnaire that measures subjective daytime sleepiness. It asks you to rate (0-3) how likely you are to doze off in eight common situations: sitting and reading, watching TV, sitting inactive in a public place, as a car passenger for an hour, lying down in the afternoon, sitting and talking to someone, sitting quietly after lunch (no alcohol), and in a car while stopped in traffic. Scores range from 0-24, with scores above 10 indicating excessive daytime sleepiness requiring evaluation. For narcolepsy patients, scores are typically 15-20 or higher before treatment. The ESS is used both diagnostically and to monitor treatment effectiveness—successful medication should reduce scores significantly. However, it measures only perceived sleepiness, not the ability to stay awake, which is why objective tests like the MSLT are also needed.

Q: What is HLA-DQB1*06:02 and why does it matter?

A: HLA-DQB106:02 is a specific variant of the human leukocyte antigen (HLA) gene involved in immune system function. Approximately 90-95% of people with narcolepsy Type 1 (with cataplexy) carry this genetic variant, compared to about 25% of the general population. This doesn’t mean everyone with this variant develops narcolepsy—it’s a susceptibility factor, not a deterministic cause. The HLA system presents protein fragments to immune cells; in narcolepsy, this particular variant may present orexin-related proteins in a way that resembles certain viral proteins (particularly influenza), triggering an autoimmune attack on orexin neurons through a process called molecular mimicry. Testing for HLA-DQB106:02 can support a narcolepsy diagnosis but isn’t definitive—its absence makes Type 1 narcolepsy very unlikely, while its presence only slightly increases risk given how common it is in the general population.

Q: Can children have narcolepsy?

A: Yes, though pediatric narcolepsy presents differently and is often missed. Symptom onset typically occurs between ages 10-20, but cases have been documented in children as young as 5-6 years old. Key differences in children: (1) Symptoms develop more gradually, (2) They rarely have the complete symptom cluster at onset, (3) Excessive sleepiness may manifest as hyperactivity or irritability rather than obvious drowsiness, (4) Weight gain and obesity are more common than in adults, (5) Academic problems and behavioral issues may be the presenting complaint. In 2024, the FDA approved pitolisant for children aged 6 and older, and sodium oxybate is approved for children 7 and older, providing more treatment options. The challenge remains getting timely diagnosis—children are frequently misdiagnosed with ADHD, epilepsy, depression, or simply labeled as lazy or unmotivated.

Q: What does “maintenance of wakefulness” mean?

A: The Maintenance of Wakefulness Test (MWT) measures your ability to stay awake in a comfortable, quiet, darkened room during the day—basically testing your resistance to falling asleep when you’re trying to stay awake. Unlike the MSLT which measures how quickly you fall asleep when trying to nap, the MWT assesses whether you CAN stay awake. During the test, you sit in a comfortable chair in a dark room for four trials of 20 or 40 minutes, with instructions to try to stay awake. The test measures sleep latency (time until you fall asleep). Normal individuals remain awake for the full trial period. People with untreated narcolepsy typically fall asleep within 8-10 minutes. This test is particularly important for assessing treatment effectiveness and determining fitness for activities requiring sustained alertness (like driving). Successful medication should significantly increase MWT times, though rarely to completely normal levels.

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