Melatonin → United States

OTC dietary supplement; no restrictions

Details

Melatonin is sold over-the-counter as a dietary supplement in the United States and is not regulated as a controlled substance. Travelers may carry personal-use quantities (typically 30-90 day supply) in carry-on or checked baggage without prescription; FDA does not require declaration for finished dietary supplements. International travelers should keep products in original retail packaging — bulk-loose tablets without manufacturer labelling may attract CBP scrutiny under the dietary supplement adulteration rules.

Quantity limit

Personal use

Legal reference

DSHEA (Dietary Supplement Health and Education Act)

Practical advice

Personal-quantity melatonin (OTC supplement) clears as routine in destinations where it is OTC. In prescription-only markets (e.g. UK, France, Germany), declare with prescription if asked.

Customs authority

U.S. Customs and Border Protection (CBP) · https://www.cbp.gov