The commenters noted that controlling suvorexant as a schedule IV controlled substance is appropriate because it is similar to zolpidem.
Under the CSA, each controlled substance is classified into one of five schedules based upon its potential for abuse, its currently accepted medical use in treatment in the United States, and the degree of dependence the substance may cause. 21 U.S.C. 812. The initial schedules of controlled substances established by Congress are found at 21 U.S.C. 812, and the current list of all scheduled substances is published at 21 CFR part 1308.
Determination to Schedule Suvorexant.
[Federal Register Volume 79, Number 167 (Thursday, August 28, 2014)] From the Federal Register Online via the Government Printing Office DEPARTMENT OF JUSTICE Drug Enforcement Administration.
Schedules of Controlled Substances: Placement of Suvorexant into Schedule IV.
(2) methanone (suvorexant) has a currently accepted medical use in treatment in the United States.