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U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 27, 2025
All Titles
Title 21
Chapter I
Part 338 - PART 338—NIGHTTIME SLEEP-AID DRUG PRODUCTS FOR OVER-THE-COUNTER HUMAN USE
Subpart A [§ 338.1 - § 338.3] - Subpart A—General Provisions
Subpart B [§ 338.10 - § 338.10] - Subpart B—Active Ingredients
Subpart C [§ 338.50 - § 338.50] - Subpart C—Labeling
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