CFR›Title 21›Chapter I›Part 340›21 CFR Part 340 Subpart B Citation21 CFR Part 340 Subpart BContainsSection § 340.10CorpusDaily eCFRDisplayed edition2026-10-02Last updated2026-10-02 Subpart B—Active Ingredient Sections § 340.10 § 340.10 Stimulant active ingredient. Authority21 U.S.C. 321, 351, 352, 353, 355, 360, 371.Source53 FR 6105, Feb. 29, 1988, unless otherwise noted.