Prior to the launch of solriamfetol (Sunosi) for narcolepsy and obstructive sleep apnea, the Drug Enforcement Administration designated it as a Schedule IV drug, indicating that it has a low potential for abuse and a low risk of dependence. Around the same time, results from the phase 3 TONES 3 study were published, showing the drug’s efficacy in increasing wakefulness and reducing sleepiness.