[Code of Federal Regulations] [Title 21, Volume 5] [Revised as of April 1, 2001] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR369.22] [Page 313] TITLE 21--FOOD AND DRUGS CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES--Continued PART 369--INTERPRETATIVE STATEMENTS RE WARNINGS ON DRUGS AND DEVICES FOR OVER-THE-COUNTER SALE--Table of Contents Subpart B--Warning and Caution Statements for Drugs Sec. 369.22 Drugs; warning and caution statements specifically required by law. PREPARATIONS CONTAINING HABIT-FORMING DERIVATIVES OF SUBSTANCES NAMED IN SECTION 502(d) OF THE ACT. (See Secs. 329.1, 329.10, and 329.20 of this chapter.) The statement ``Warning--May be habit forming'' is required to appear on the labels of all drugs containing derivatives designated in Sec. 329.1 of this chapter as habit forming, including exempt narcotic preparations described in Sec. 329.20(a) of this chapter and preparations containing one or more derivatives of barbituric acid, unless such drug is not suitable for internal use and is distributed and sold exclusively for such external use as involves no possibility of habit formation.