Which medication is commonly used to treat narcolepsy?

Modafinil is commonly used to treat narcolepsy, as it has been shown to improve wakefulness and reduce excessive daytime sleepiness associated with this condition. It is a wakefulness-promoting agent that works by influencing neurochemical pathways in the brain that are involved in the regulation of sleep and wakefulness.

Dextroamphetamine and amphetamine are stimulant medications that can also be effective in managing narcolepsy by promoting wakefulness. However, they may have a higher potential for abuse and more side effects compared to modafinil, which makes modafinil a preferred option in many cases.

Eszopiclone, on the other hand, is primarily a sleep aid and is not typically used to treat narcolepsy. It is prescribed for the treatment of insomnia, which is distinctly different from the excessive daytime sleepiness experienced by individuals with narcolepsy.

In summary, the use of modafinil is well-supported in clinical practice for managing narcolepsy symptoms, making it the most appropriate choice for treatment among those listed.