What is a common symptom of Narcolepsy?

Narcolepsy is characterized by several hallmark symptoms, two of which are specifically included in the correct choice. Recurrent irresistible sleep during the day is a defining feature of narcolepsy, leading to episodes of excessive daytime sleepiness that prompt individuals to fall asleep unexpectedly in various situations.

Cataplexy, which is a sudden loss of muscle tone often triggered by strong emotions, is another key symptom associated with narcolepsy. These episodes can vary in severity and can cause significant impairment in functioning.

The inclusion of both of these symptoms as part of the diagnosis highlights the diversity of experiences among those with narcolepsy and helps differentiate this disorder from other conditions that may cause excessive sleepiness or sleep disturbances.

The other symptom listed, difficulty maintaining sleep, while it may be present in some individuals, is not a primary symptom of narcolepsy. Instead, it is more often associated with other sleep disorders, such as insomnia. Thus, the combination of recurrent daytime sleep episodes and cataplexy distinctly identifies the common symptoms linked to narcolepsy.