Displaying 3 results of Solriamfetol Stable Isotopes Solriamfetol is a medication used to treat excessive sleepiness caused by sleep apnea, narcolepsy, or shift work disorder. It works by increasing the levels of certain chemicals in the brain that promote wakefulness. Stable isotopes refer to non-radioactive forms of the elements used in the manufacture of the medication, which allows for more consistent and reliable production.