ADHD Might be masking Narcolepsy

🧠 Exploring the Link Between ADHD & Narcolepsy

In the scholarly article, Attention-Deficit/Hyperactivity Disorder Patients May Have Undiagnosed Narcolepsy, written in 2020, the authors were researching the possibility that when someone has ADHD that they might also have undiagnosed Narcolepsy. While their research pool was small due to the global pandemic at the time of writing, their research yielded thought-provoking results. According to the authors, no previous studies compare ADHD patients with healthy controls to identify narcolepsy comorbidity. 

Larger research pools are generally more desirable because they increase statistical power and make findings more reliable and generalizable across diverse populations. However, smaller or more targeted samples can be especially helpful in early exploratory research, rare populations, or highly controlled studies where depth, specificity, and precision are more important than broad generalization.

👥 Study Design and Participant Overview

The researchers had a participant pool of 26 adults. 14 of which were formally diagnosed with ADHD, and the remaining 12 were controls of similar age. All participants were caucasian and were provided written informed consent. The exclusion process was extensive. Any participant who had been diagnosed with a psychotic disease, or had scored highly on the alcohol disorder test were excluded from the study. Participants who had taken several medications were also excluded.

⚠️ Key Findings

The researchers found that 3 people diagnosed with ADHD might actually also have narcolepsy, which had been missed. No one in the comparison group showed this issue. While the number was too small to be considered statistically significant, it still matters in real-world care. It suggests clinicians should look more closely for narcolepsy in people with ADHD, which could lead to better diagnosis and treatment for those affected.

With the participant pool being small, this result does indicate that narcolepsy may be more frequently misdiagnosed. This could be due to the fact that ADHD medications are similar to the medications used to treat narcolepsy, so symptoms impairing function are naturally mitigated, though possibly not completely, but there are differences. The researchers suggest that the participants who were identified as also narcoleptic may benefit from taking the medication modafinil rather than methylphenidate, and it may improve their overall well-being.

📚 What Other Research Says

Because the study had a small number of participants, the results aren’t definitive, but they do suggest that narcolepsy might be missed more often than we think, especially in people with ADHD. Research like Exploring the Intersection of Narcolepsy and Attention Deficit Hyperactivity Disorder supports this idea, noting that the two conditions share symptoms like daytime sleepiness and trouble focusing, which can make them hard to tell apart. In fact, studies have found that a significant number of people with narcolepsy also show ADHD symptoms, further complicating diagnosis.

🔍 Challenges in Diagnosis and Treatment

One reason for misdiagnosis may be that ADHD medications are similar to those used for narcolepsy, so they can partially reduce symptoms and mask the underlying condition. However, the treatments aren’t identical, and some patients may feel better on a medication like modafinil instead of methylphenidate. The review also emphasizes that differences, such as specific sleep study findings, are important for making an accurate diagnosis, and that clinicians should carefully consider the possibility of both conditions occurring together.

🩺 What This Means for Real-World Care

Overall, the research suggests that people with ADHD may be more likely than previously thought to also have undiagnosed narcolepsy. Larger and more diverse studies are needed to better understand this connection, including differences across age, ethnicity, and socioeconomic status. The authors also highlight the need for continued research into treatment approaches—including medication choices and factors like iron levels—and stress the importance of a multidisciplinary approach to care.

References

Lukas, W., & Markku, P. (2020). Attention-Deficit/Hyperactivity Disorder Patients May Have Undiagnosed Narcolepsy. Cureus, 12(6) https://doi.org/10.7759/cureus.8436

Yoon, S. H., Kim, Y.-C., Seo, H. J., Kim, T. W., Jeong, J.-H., Um, Y. H., & Hong, S. C. (2024). Exploring the intersection of narcolepsy and attention deficit hyperactivity disorder: Similarities, differences, and clinical implications. Sleep Medicine Research, 15(1), 6–11. https://doi.org/10.17241/smr.2024.02187

As an Amazon Associate, I earn from qualifying purchases at no extra cost to you. Funds go to furthering the reach of Mental Health.